WO2013125426A1 - 非水系電解質二次電池用正極材料とその製造方法、および該正極材料を用いた非水系電解質二次電池 - Google Patents
非水系電解質二次電池用正極材料とその製造方法、および該正極材料を用いた非水系電解質二次電池 Download PDFInfo
- Publication number
- WO2013125426A1 WO2013125426A1 PCT/JP2013/053472 JP2013053472W WO2013125426A1 WO 2013125426 A1 WO2013125426 A1 WO 2013125426A1 JP 2013053472 W JP2013053472 W JP 2013053472W WO 2013125426 A1 WO2013125426 A1 WO 2013125426A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- positive electrode
- secondary battery
- lithium
- electrolyte secondary
- electrode material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1391—Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/40—Complex oxides containing nickel and at least one other metal element
- C01G53/42—Complex oxides containing nickel and at least one other metal element containing alkali metals, e.g. LiNiO2
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/002—Methods
- B29B7/005—Methods for mixing in batches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/003—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor characterised by the choice of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/40—Complex oxides containing nickel and at least one other metal element
- C01G53/42—Complex oxides containing nickel and at least one other metal element containing alkali metals, e.g. LiNiO2
- C01G53/44—Complex oxides containing nickel and at least one other metal element containing alkali metals, e.g. LiNiO2 containing manganese
- C01G53/50—Complex oxides containing nickel and at least one other metal element containing alkali metals, e.g. LiNiO2 containing manganese of the type (MnO2)n-, e.g. Li(NixMn1-x)O2 or Li(MyNixMn1-x-y)O2
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/043—Processes of manufacture in general involving compressing or compaction
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/364—Composites as mixtures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
- H01M4/622—Binders being polymers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/16—Fillers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2509/00—Use of inorganic materials not provided for in groups B29K2503/00 - B29K2507/00, as filler
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0003—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular electrical or magnetic properties, e.g. piezoelectric
- B29K2995/0005—Conductive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3468—Batteries, accumulators or fuel cells
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/40—Electric properties
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/028—Positive electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a positive electrode material for a non-aqueous electrolyte secondary battery, a manufacturing method thereof, and a non-aqueous electrolyte secondary battery using the positive electrode active material.
- lithium ion secondary battery a material from which lithium can be desorbed and inserted is used for the active material of the negative electrode and the positive electrode.
- Such lithium ion secondary batteries are currently being actively researched and developed. Among them, lithium ion secondary batteries using a layered or spinel type lithium metal composite oxide as a positive electrode material are among them. Since a high voltage of 4V class can be obtained, practical use is progressing as a battery having a high energy density.
- active material materials examples include lithium cobalt composite oxide (LiCoO 2 ) that is relatively easy to synthesize, lithium nickel composite oxide (LiNiO 2 ) using nickel that is less expensive than cobalt, lithium Examples thereof include nickel cobalt manganese composite oxide (LiNi 1/3 Co 1/3 Mn 1/3 O 2 ), lithium manganese composite oxide (LiMn 2 O 4 ) using manganese, and the like.
- lithium nickel composite oxide and lithium nickel cobalt manganese composite oxide are attracting attention as materials with good cycle characteristics, low resistance and high output, and excellent battery characteristics. Low resistance is regarded as important.
- Patent Document 1 contains at least one element selected from Mo, W, Nb, Ta, and Re in an amount of 0.1 to 5 mol% with respect to the total molar amount of Mn, Ni, and Co.
- Lithium transition metal-based compound powder for lithium secondary battery positive electrode material has been proposed, and Mo, W, Nb, Ta and Li for the surface portion of primary particles and the total of metal elements other than Mo, W, Nb, Ta and Re
- the total atomic ratio of Re is preferably 5 times or more of the atomic ratio of the entire primary particle. According to this proposal, it is possible to achieve both low cost and high safety of the lithium transition metal compound powder for the lithium secondary battery positive electrode material, high load characteristics, and improved powder handling properties.
- the lithium transition metal compound powder is obtained by pulverizing raw materials in a liquid medium, spray-drying a slurry in which these are uniformly dispersed, and firing the obtained spray-dried body. For this reason, some of the different elements such as Mo, W, Nb, Ta, and Re are replaced with Ni that is arranged in a layered manner, and there is a problem that battery characteristics such as battery capacity and cycle characteristics deteriorate. Yes.
- Patent Document 2 discloses a positive electrode active material for a non-aqueous electrolyte secondary battery having at least a layered lithium transition metal composite oxide, the lithium transition metal composite oxide being composed of primary particles and aggregates thereof. It exists in the form of a particle composed of one or both of certain secondary particles, and has a compound having at least one selected from the group consisting of molybdenum, vanadium, tungsten, boron and fluorine on at least the surface of the particle.
- a positive electrode active material for a non-aqueous electrolyte secondary battery has been proposed, and a positive electrode active material for a non-aqueous electrolyte secondary battery having excellent battery characteristics even under a more severe use environment is obtained.
- the conductivity is improved, so that the thermal stability, load characteristics and output characteristics are improved. It is disclosed that initial characteristics are improved without impairing the improvement.
- the effect of the selected additive element is on the improvement of the initial characteristics, that is, the initial discharge capacity and the initial efficiency, and the effect on the output characteristics is based on the aspect ratio of the primary particles. Further, according to the disclosed manufacturing method, since the additive element is mixed with the hydroxide that has been heat-treated at the same time as the lithium compound and fired, a part of the additive element is replaced with nickel arranged in layers. There was a problem that caused the battery characteristics to deteriorate.
- Patent Document 3 discloses lithium having a surface layer containing at least one element selected from the group consisting of Mo and W and Li on the surface of a lithium composite oxide powder capable of occluding and releasing Li ions.
- a positive electrode active material for a secondary battery has been proposed. This proposal addresses the further increase in capacity, energy density, and size of lithium ion secondary batteries, so that a positive active material with good thermal stability can be produced without significantly degrading high initial discharge capacity. It is intended to provide, and no mention is made of improving the output characteristics.
- Patent Document 4 discloses a metal oxide carrier and a lithium ion conductive group or a lithium ion conductive metal oxide supported on the metal oxide carrier and having higher acidity than the metal oxide carrier.
- a lithium ion conductivity improving material characterized by having it has been proposed. According to this proposal, the use of the conductivity improver can effectively improve lithium ion conductivity and reduce lithium ion resistance in the battery.
- lithium ion conductivity is improved by adding a lithium ion conductivity improver to any of the positive electrode layer, the negative electrode layer, and the separator, the battery
- the purpose is to improve the lithium ion conductivity between the constituent materials, and not to reduce the resistance in charge / discharge of the positive electrode active material itself.
- the lithium ion resistance improving effect in the disclosed embodiments is sufficient.
- an object of the present invention is to provide a positive electrode material mixture for a non-aqueous electrolyte secondary battery that can provide a high output with a high capacity when used in a positive electrode.
- the present inventors have intensively studied the influence of the lithium metal composite oxide used as the positive electrode active material for the nonaqueous electrolyte secondary battery on the powder characteristics and the positive electrode resistance of the battery. It has been found that mixing the composite oxide powder and lithium tungstate can significantly reduce the positive electrode resistance of the battery and improve the output characteristics, thus completing the present invention.
- the manufacturing method of the first positive electrode material for a nonaqueous electrolyte secondary battery which is the invention of the present invention have the general formula Li z Ni 1-x-y Co x M y O 2 ( however, 0.10 ⁇ x ⁇ 0.35, 0 ⁇ y ⁇ 0.35, 0.97 ⁇ z ⁇ 1.20, M is an additive element, and at least one element selected from Mn, V, Mg, Mo, Nb, Ti and Al Lithium tungstate is mixed with a lithium metal composite oxide powder composed of primary particles and secondary particles formed by aggregation of primary particles.
- a second aspect of the present invention is a non-aqueous system comprising a step of washing the lithium metal composite oxide powder with water before mixing the lithium metal composite oxide powder and lithium tungstate according to the first invention. It is a manufacturing method of the positive electrode material for electrolyte secondary batteries.
- the amount of tungsten contained in the positive electrode material for a non-aqueous electrolyte secondary battery in the first and second inventions is the number of atoms of nickel, cobalt and M contained in the lithium metal composite oxide powder.
- a fourth invention of the present invention is characterized in that the lithium tungstate in the first to third inventions is at least one selected from Li 2 WO 4 , Li 4 WO 5 and Li 6 W 2 O 9. This is a method for producing a positive electrode material for a non-aqueous electrolyte secondary battery.
- the positive electrode material for a non-aqueous electrolyte secondary battery according to the fifth aspect of the present invention has a general formula Li z Ni 1-xy Co x M y O 2 (where 0.10 ⁇ x ⁇ 0.35, 0 ⁇ y ⁇ 0.35, 0.97 ⁇ z ⁇ 1.20, M is an additive element, and is represented by at least one element selected from Mn, V, Mg, Mo, Nb, Ti and Al)
- a positive electrode material for a non-aqueous electrolyte secondary battery comprising a mixture of a lithium metal composite oxide powder composed of primary particles and secondary particles formed by aggregation of primary particles and lithium tungstate.
- the amount of tungsten contained in the positive electrode material for a non-aqueous electrolyte secondary battery according to the fifth aspect is the sum of the number of atoms of nickel, cobalt and M contained in the lithium metal composite oxide powder.
- the positive electrode material for a non-aqueous electrolyte secondary battery is characterized in that the number of tungsten atoms is 0.1 to 3.0 atomic%.
- the seventh invention of the present invention is characterized in that the lithium tungstate in the fifth and sixth inventions is at least one selected from Li 2 WO 4 , Li 4 WO 5 , and Li 6 W 2 O 9.
- a positive electrode material for a non-aqueous electrolyte secondary battery characterized in that it preferably contains Li 4 WO 5 .
- the eighth invention of the present invention is a non-aqueous electrolyte secondary battery comprising a positive electrode comprising a positive electrode material for a non-aqueous electrolyte secondary battery according to the fifth to seventh inventions of the present invention.
- a positive electrode active material for a non-aqueous electrolyte secondary battery that can achieve a high output with a high capacity when used as a positive electrode material of a battery can be obtained. Moreover, the manufacturing method is easy and suitable for production on an industrial scale, and its industrial value is extremely large.
- the present invention will be described in detail. First, the positive electrode active material of the present invention will be described, and then a manufacturing method thereof and a non-aqueous electrolyte secondary battery using the positive electrode active material will be described.
- (1) positive electrode material for a nonaqueous electrolyte secondary battery of the positive electrode active material present invention have the general formula Li z Ni 1-x-y Co x M y O 2 ( however, 0.10 ⁇ x ⁇ 0.35,0 ⁇ y ⁇ 0.35, 0.97 ⁇ z ⁇ 1.20, M is an additive element, and is represented by at least one element selected from Mn, V, Mg, Mo, Nb, Ti and Al) It includes a mixture of lithium metal composite oxide powder composed of primary particles and secondary particles formed by aggregation of the primary particles and lithium tungstate.
- a high charge / discharge capacity is obtained by using the lithium metal composite oxide powder represented by the above general formula as the positive electrode active material as a base material. Furthermore, by mixing the lithium metal composite oxide powder and lithium tungstate, the output characteristics are improved while maintaining the charge / discharge capacity.
- the surface of the positive electrode active material is completely covered with a different compound, the movement (intercalation) of lithium ions is greatly restricted, and as a result, the advantage of the high capacity of the lithium composite oxide is eliminated. Will be. In addition, dissolving different elements in the lithium composite oxide tends to cause a decrease in capacity.
- the surface of the positive electrode active material can be intercalated on the surface of the positive electrode active material by coating the surface of the positive electrode active material with such a compound.
- post-treatment such as heat treatment is necessary for coating, which may lead to deterioration of excellent battery characteristics of the positive electrode active material.
- Lithium tungstate is also a compound with high lithium ion conductivity, but lithium tungstate is simply mixed with lithium metal composite oxide and dispersed between the particles of lithium metal composite oxide to promote lithium migration.
- the positive electrode resistance can be greatly reduced. Since this lithium tungstate is uniformly present in the positive electrode material, it acts on the electrolytic solution or the positive electrode active material to form a lithium conduction path between the electrolytic solution and the positive electrode active material interface, and the reaction of the active material The output characteristics can be improved by reducing the resistance.
- lithium tungstate When lithium tungstate is unevenly distributed in the positive electrode material, the movement of lithium ions between the lithium metal composite oxide particles becomes non-uniform, which places a load on specific lithium metal composite oxide particles. It tends to cause deterioration of cycle characteristics and increase of reaction resistance. Therefore, it is preferable that lithium tungstate is uniformly distributed in the positive electrode material.
- the average particle diameter of the lithium tungstate is preferably 0.1 to 10 ⁇ m, and more preferably 0.1 to 5 ⁇ m. If the average particle diameter is less than 0.1 ⁇ m, fine lithium tungstate particles that do not have sufficient lithium ion conductivity are included, and the above effect cannot be obtained in a portion where such fine particles are present. As in the case of non-uniform dispersion, the cycle characteristics may deteriorate and the reaction resistance may increase. On the other hand, if the particle diameter exceeds 10 ⁇ m, lithium tungstate cannot be uniformly dispersed in the positive electrode material, and the effect of reducing reaction resistance may not be sufficiently obtained.
- the average particle diameter can be measured using a volume integrated average value in a laser diffraction scattering method. In addition, when a particle diameter exceeds the said range, it is preferable to grind
- the amount of tungsten contained in this positive electrode material is preferably 0.1 to 3.0 atomic% with respect to the total number of nickel, cobalt and M atoms contained in the lithium metal composite oxide to be mixed. Thereby, it is possible to achieve both high charge / discharge capacity and output characteristics. If the amount of tungsten is less than 0.1 atomic%, the effect of improving the output characteristics may not be sufficiently obtained. If the amount of tungsten exceeds 3.0 atomic%, the lithium tungstate becomes too much and lithium metal composite oxidation. Lithium conduction between the product and the electrolyte may be hindered and the charge / discharge capacity may be reduced.
- the lithium tungstate is preferably at least one selected from Li 2 WO 4 , Li 4 WO 5 or Li 6 W 2 O 9, and more preferably includes Li 4 WO 5 . It is particularly preferable that 50 mol% or more of Li 4 WO 5 is contained in the lithium tungstate. These lithium tungstates have high lithium ion conductivity, and the above effects can be sufficiently obtained by mixing with lithium metal composite oxide powder.
- the lithium amount of the lithium metal composite oxide is 0.97 in terms of the ratio (Li / Me) of the sum of the number of atoms of nickel, cobalt, and M (Me) in the lithium metal composite oxide to the number of atoms of lithium (Li). ⁇ 1.20.
- Li / Me is less than 0.97, the reaction resistance of the positive electrode in the non-aqueous electrolyte secondary battery using the positive electrode material is increased, so that the output of the battery is lowered.
- Li / Me exceeds 1.20, the discharge capacity of the positive electrode active material decreases and the reaction resistance of the positive electrode also increases.
- Li / Me is preferably set to 1.10 or less.
- Co and additive element M are added in order to improve battery characteristics such as cycle characteristics and output characteristics. If x and y indicating these addition amounts exceed 0.35, they contribute to the Redox reaction. Since Ni decreases, the battery capacity decreases. On the other hand, if x indicating the amount of Co added is less than 0.10, sufficient cycle characteristics and thermal stability cannot be obtained. In order to obtain a sufficient battery capacity when used in a battery, y indicating the amount of M added is preferably 0.15 or less.
- lithium metal composite oxide particles composed of primary particles and secondary particles formed by aggregation of the primary particles are used. .
- the positive electrode material of the present invention has improved output characteristics by mixing lithium metal composite oxide powder and lithium tungstate, and is a powder such as the particle size and tap density of the lithium metal composite oxide as the positive electrode active material.
- the body characteristics may be within the range of a positive electrode active material that is usually used.
- the lithium metal composite oxide may be obtained by a known method, and one satisfying the above composition and powder characteristics can be used.
- the effects obtained by mixing lithium metal composite oxide powder and lithium tungstate include, for example, lithium cobalt composite oxide, lithium manganese composite oxide, lithium nickel cobalt manganese composite oxide, etc.
- the present invention can be applied not only to the positive electrode active material but also to a commonly used positive electrode active material for a lithium secondary battery.
- a general formula Li z Ni 1-xy Co x M y O 2 (where 0.10 ⁇ x ⁇ 0.35, 0 ⁇ y ⁇ 0.35, 0.97 ⁇ z ⁇ 1.10, M is at least one element selected from Mn, V, Mg, Mo, Nb, Ti and Al)
- lithium metal composite oxide powder composed of primary particles and secondary particles formed by aggregation of the primary particles and lithium tungstate are mixed.
- Lithium metal composite oxide powder and lithium tungstate are mixed sufficiently to make the dispersion of lithium tungstate uniform in the positive electrode material.
- a general mixer can be used.
- tungsten is used to such an extent that the shape of the lithium metal composite oxide particles is not destroyed by using a shaker mixer, a Laedige mixer, a Julia mixer, a V blender, or the like. What is necessary is just to mix thoroughly with lithium acid. Thereby, lithium tungstate can be uniformly distributed in the lithium metal composite oxide powder.
- the lithium metal composite oxide powder in order to improve the battery capacity and safety of the positive electrode material, can be further washed with water before the mixing step. Washing with water may be performed by a known method and conditions as long as lithium is not excessively eluted from the lithium metal composite oxide powder and the battery characteristics are not deteriorated.
- Washing with water may be performed by a known method and conditions as long as lithium is not excessively eluted from the lithium metal composite oxide powder and the battery characteristics are not deteriorated.
- it When washed with water, it may be dried and then mixed with lithium tungstate, or may be mixed with lithium tungstate without drying only by solid-liquid separation and then dried. The drying may be performed by a known method and conditions as long as the battery characteristics of the lithium metal composite oxide are not deteriorated.
- Non-aqueous electrolyte secondary battery of the present invention includes a positive electrode, a negative electrode, a non-aqueous electrolyte solution, and the like, and includes the same components as those of a general non-aqueous electrolyte secondary battery.
- the embodiment described below is merely an example, and the nonaqueous electrolyte secondary battery of the present invention can be variously modified based on the knowledge of those skilled in the art based on the embodiment described in the present specification. It can be implemented in an improved form. Moreover, the use of the nonaqueous electrolyte secondary battery of the present invention is not particularly limited.
- a positive electrode of a non-aqueous electrolyte secondary battery is produced as follows. First, a powdered positive electrode material, a conductive material, and a binder are mixed, and if necessary, a target solvent such as activated carbon and viscosity adjustment is added and kneaded to prepare a positive electrode mixture paste.
- a target solvent such as activated carbon and viscosity adjustment is added and kneaded to prepare a positive electrode mixture paste.
- each mixing ratio in the positive electrode mixture paste is also an important factor that determines the performance of the non-aqueous electrolyte secondary battery.
- the content of the positive electrode active material is 60 to 95 parts by mass in the same manner as the positive electrode of a general non-aqueous electrolyte secondary battery, It is desirable that the content of the conductive material is 1 to 20 parts by mass and the content of the binder is 1 to 20 parts by mass.
- the obtained positive electrode mixture paste is applied to the surface of a current collector made of, for example, an aluminum foil and dried to disperse the solvent. If necessary, pressurization may be performed by a roll press or the like to increase the electrode density. In this way, a sheet-like positive electrode can be produced.
- the produced sheet-like positive electrode can be cut into an appropriate size or the like according to the intended battery and used for battery production.
- the method for manufacturing the positive electrode is not limited to the above-described examples, and other methods may be used.
- the conductive agent for example, graphite (natural graphite, artificial graphite, expanded graphite, etc.), carbon black materials such as acetylene black, ketjen black, and the like can be used.
- the binder plays a role of anchoring the active material particles.
- PVDF polyvinylidene fluoride
- PTFE polytetrafluoroethylene
- fluorine rubber ethylene propylene diene rubber
- styrene butadiene cellulosic resin
- polyacrylic An acid or the like can be used.
- a positive electrode active material, a conductive material, and activated carbon are dispersed, and a solvent that dissolves the binder is added to the positive electrode mixture.
- a solvent that dissolves the binder is added to the positive electrode mixture.
- an organic solvent such as N-methyl-2-pyrrolidone can be used as the solvent.
- Activated carbon can be added to the positive electrode mixture in order to increase the electric double layer capacity.
- Negative electrode A negative electrode mixture in which a negative electrode active material capable of occluding and desorbing lithium ions is mixed with a binder and an appropriate solvent is added to the negative electrode. Is applied to the surface of a metal foil current collector such as copper, dried, and compressed to increase the electrode density as necessary.
- the negative electrode active material for example, natural graphite, artificial graphite, a fired organic compound such as phenol resin, or a powdery carbon material such as coke can be used.
- a fluorine-containing resin such as PVDF can be used as the negative electrode binder, as in the case of the positive electrode, and a solvent for dispersing these active materials and the binder can be N-methyl-2-pyrrolidone or the like.
- Organic solvents can be used.
- (C) Separator A separator is interposed between the positive electrode and the negative electrode.
- the separator separates the positive electrode and the negative electrode and retains the electrolyte, and a thin film such as polyethylene or polypropylene and a film having many minute holes can be used.
- Non-aqueous electrolyte The non-aqueous electrolyte is obtained by dissolving a lithium salt as a supporting salt in an organic solvent.
- the organic solvent include cyclic carbonates such as ethylene carbonate, propylene carbonate, butylene carbonate, and trifluoropropylene carbonate, chain carbonates such as diethyl carbonate, dimethyl carbonate, ethylmethyl carbonate, and dipropyl carbonate, tetrahydrofuran, 2- One kind selected from ether compounds such as methyltetrahydrofuran and dimethoxyethane, sulfur compounds such as ethylmethylsulfone and butanesultone, phosphorus compounds such as triethyl phosphate and trioctyl phosphate, etc. are used alone or in admixture of two or more. be able to.
- the non-aqueous electrolyte solution may contain a radical scavenger, a surfactant, a flame retardant, and the like.
- the shape of the non-aqueous electrolyte secondary battery of the present invention composed of the positive electrode, the negative electrode, the separator, and the non-aqueous electrolyte described above is cylindrical, Various types such as a laminated type can be used.
- the positive electrode and the negative electrode are laminated via a separator to form an electrode body, and the obtained electrode body is impregnated with a non-aqueous electrolyte and communicated with the positive electrode current collector and the outside.
- the positive electrode terminal and the negative electrode current collector and the negative electrode terminal communicating with the outside are connected using a current collecting lead or the like and sealed in a battery case to complete a non-aqueous electrolyte secondary battery. .
- the nonaqueous electrolyte secondary battery using the positive electrode active material of the present invention has a high capacity and a high output.
- a non-aqueous electrolyte secondary battery using a positive electrode active material obtained in a more preferable form for example, has a high initial discharge capacity of 165 mAh / g or more and a low positive electrode resistance when used for the positive electrode of a 2032 type coin battery. Higher capacity and higher output. Further, it has high thermal stability and is excellent in safety.
- the measuring method of the positive electrode resistance in this invention is illustrated below.
- the frequency dependence of the battery reaction is measured by a general AC impedance method as an electrochemical evaluation method
- the Nyquist diagram based on the solution resistance, the negative electrode resistance and the negative electrode capacity, and the positive electrode resistance and the positive electrode capacity is shown in FIG. Is obtained as follows.
- the battery reaction at this electrode consists of a resistance component due to charge transfer and a capacitance component due to the electric double layer. When these are expressed as an electric circuit, it becomes a parallel circuit of resistance and capacity. It is represented by an equivalent circuit in which circuits are connected in series. Fitting calculation is performed on the Nyquist diagram measured using this equivalent circuit, and each resistance component and capacitance component can be estimated.
- the positive electrode resistance is equal to the diameter of the semicircle on the low frequency side of the obtained Nyquist diagram. From the above, the positive electrode resistance can be estimated by performing AC impedance measurement on the manufactured positive electrode and performing fitting calculation on the obtained Nyquist diagram with an equivalent circuit.
- the coin-type battery 1 is composed of a case 2 and an electrode 3 accommodated in the case 2.
- the case 2 has a positive electrode can 2a that is hollow and open at one end, and a negative electrode can 2b that is disposed in the opening of the positive electrode can 2a.
- the negative electrode can 2b is disposed in the opening of the positive electrode can 2a, A space for accommodating the electrode 3 is formed between the negative electrode can 2b and the positive electrode can 2a.
- the electrode 3 includes a positive electrode 3a, a separator 3c, and a negative electrode 3b, which are stacked in this order.
- the positive electrode 3a contacts the inner surface of the positive electrode can 2a
- the negative electrode 3b contacts the inner surface of the negative electrode can 2b.
- the case 2 includes a gasket 2c, and relative movement is fixed by the gasket 2c so as to maintain a non-contact state between the positive electrode can 2a and the negative electrode can 2b.
- the gasket 2c also has a function of sealing a gap between the positive electrode can 2a and the negative electrode can 2b to block the inside and outside of the case 2 in an airtight and liquid tight manner.
- the coin-type battery 1 used was manufactured as follows. First, 52.5 mg of a positive electrode material for a non-aqueous electrolyte secondary battery, 15 mg of acetylene black, and 7.5 mg of polytetrafluoroethylene resin (PTFE) are mixed, press-molded to a diameter of 11 mm and a thickness of 100 ⁇ m at a pressure of 100 MPa, and the positive electrode 3a was produced. Next, the produced positive electrode 3a was dried in a vacuum dryer at 120 ° C. for 12 hours. Using the dried positive electrode 3a, the negative electrode 3b, the separator 3c, and the electrolyte, the coin-type battery 1 of FIG. 2 was produced in a glove box in an Ar atmosphere in which the dew point was controlled at ⁇ 80 ° C.
- PTFE polytetrafluoroethylene resin
- the negative electrode 3b a negative electrode sheet in which graphite powder having an average particle diameter of about 20 ⁇ m punched into a disk shape with a diameter of 14 mm and polyvinylidene fluoride were applied to a copper foil was used. Further, a polyethylene porous film having a film thickness of 25 ⁇ m was used for the separator 3c.
- the electrolytic solution an equivalent mixed solution (manufactured by Toyama Pharmaceutical Co., Ltd.) of ethylene carbonate (EC) and diethyl carbonate (DEC) using 1M LiClO 4 as a supporting electrolyte was used.
- the initial discharge capacity and positive electrode resistance showing the performance of the manufactured coin-type battery 1 were evaluated by the following methods.
- the initial discharge capacity is left for about 24 hours after the coin-type battery 1 is manufactured.
- OCV open circuit voltage
- the current density with respect to the positive electrode is set to 0.1 mA / cm 2 and the cut-off voltage 4
- the capacity when the battery was charged to 3 V, discharged after a pause of 1 hour to a cutoff voltage of 3.0 V was defined as the initial discharge capacity.
- the positive resistance is measured by the AC impedance method using a frequency response analyzer and potentio galvanostat (1255B manufactured by Solartron) after charging the coin-type battery 1 at a charging potential of 4.1 V.
- the obtained Nyquist plot is represented as the sum of the characteristic curves indicating the solution resistance, the negative electrode resistance and its capacity, and the positive electrode resistance and its capacity, so that fitting calculation is performed using an equivalent circuit based on this Nyquist plot, The value of the positive electrode resistance was calculated. Note that, in this example, Wako Pure Chemical Industries, Ltd. reagent grade samples were used for the production of composite hydroxide, the production of the positive electrode active material, and the secondary battery.
- the oxide powder was used as a base material for the positive electrode material.
- the lithium metal composite oxide powder had an average particle size of 5.0 ⁇ m and a specific surface area of 0.9 m 2 / g.
- the composition was analyzed by the ICP method, the average particle size was evaluated by the volume integrated average value in the laser diffraction scattering method, and the specific surface area was evaluated by using the nitrogen gas adsorption BET method.
- lithium tungstate (Li 2 WO 4 ) powder is added, and further, a shaker mixer device (TURBULA Type T2C manufactured by Willy et Bacofen (WAB)) is used.
- the mixture was sufficiently mixed to obtain a mixture of lithium tungstate and lithium metal composite oxide powder to obtain a positive electrode material.
- the tungsten content in this positive electrode material was analyzed by the ICP method, it was confirmed that the composition was 0.50 atomic% with respect to the total number of nickel, cobalt and M atoms. From this, it was also confirmed that the mixture of the mixture of the lithium tungstate powder and the lithium metal composite oxide powder and the composition of the positive electrode material were equivalent.
- Battery characteristics of the coin-type battery 1 having a positive electrode formed using the obtained positive electrode material were evaluated.
- a relative value with Example 1 as 100 was used as the evaluation value.
- the initial discharge capacity in Example 1 was 182.7 mAh / g, and the discharge capacity after 500 cycles was 170.6 mAh / g.
- Table 1 shows evaluation values of initial discharge capacities and positive electrode resistances of Examples 1 to 7 and Comparative Example 1.
- a coin-type battery was produced using the positive electrode material for a nonaqueous electrolyte secondary battery produced in the same manner as in Example 1 except that the lithium tungstate used was changed to 0.57 g, and the battery was evaluated.
- Lithium metal composite oxide having a composition represented by Li 1.060 Ni 0.82 Co 0.15 Al 0.03 O 2 as a base material, an average particle size of 13.2 ⁇ m, and a specific surface area of 0.7 m 2 / g
- a coin-type battery was produced using the positive electrode material for a non-aqueous electrolyte secondary battery produced in the same manner as in Example 1 except that the powder was used as a base material for the positive electrode material, and the battery was evaluated.
- Lithium metal composite oxide having a composition represented by Li 1.150 Ni 0.34 Co 0.33 Mn 0.33 O 2 as a base material, an average particle size of 4.1 ⁇ m, and a specific surface area of 1.0 m 2 / g
- a coin-type battery was produced using the positive electrode material for a non-aqueous electrolyte secondary battery produced in the same manner as in Example 1 except that the powder was used as the base material of the positive electrode material, and the battery was evaluated.
- a coin-type battery was produced using the battery, and the battery was evaluated.
- a coin-type battery was produced using the positive electrode material for a non-aqueous electrolyte secondary battery produced in the same manner as in Example 1 except that the lithium tungstate used was 1.33 g, and the battery was evaluated.
- Example 1 A coin-type battery was prepared using the lithium metal composite oxide powder used as the base material in Example 1 as the positive electrode active material (positive electrode material), and the battery was evaluated.
- Example 6 Since the positive electrode materials of Examples 1 to 7 were manufactured according to the present invention, the non-aqueous electrolyte secondary battery using this positive electrode material has a high initial discharge capacity and a low positive electrode resistance, and has excellent characteristics. It was confirmed that a battery having In particular, Examples 1 to 6, which were carried out under preferable conditions for the amount of added lithium tungstate, had even better initial discharge capacity and positive electrode resistance, and became more suitable as a positive electrode material for non-aqueous electrolyte secondary batteries. Yes. In particular, Example 6 has good initial discharge capacity and positive electrode resistance.
- Example 7 since the amount of added lithium tungstate is large, lithium conduction between the lithium metal composite oxide and the electrolyte in the positive electrode material is hindered, and the initial discharge capacity and positive electrode resistance are slightly higher than those in Examples 1 to 6. The result was inferior.
- the non-aqueous electrolyte secondary battery using the positive electrode material of the present invention has a high initial discharge capacity and a low positive electrode resistance, and has excellent characteristics.
- the non-aqueous electrolyte secondary battery of the present invention is suitable for a power source of a small portable electronic device (such as a notebook personal computer or a mobile phone terminal) that always requires a high capacity, and an electric vehicle battery that requires a high output. Also suitable.
- the nonaqueous electrolyte secondary battery of the present invention has excellent safety, and can be downsized and increased in output, and thus is suitable as a power source for an electric vehicle subject to restrictions on mounting space.
- the present invention can be used not only as a power source for an electric vehicle driven purely by electric energy but also as a power source for a so-called hybrid vehicle used in combination with a combustion engine such as a gasoline engine or a diesel engine.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Secondary Cells (AREA)
Description
このような要求を満たす二次電池として、リチウムイオン二次電池がある。
このようなリチウムイオン二次電池については、現在研究、開発が盛んに行われているところであるが、中でも、層状またはスピネル型のリチウム金属複合酸化物を正極材料に用いたリチウムイオン二次電池は、4V級の高い電圧が得られるため、高いエネルギー密度を有する電池として実用化が進んでいる。
このうちリチウムニッケル複合酸化物、及びリチウムニッケルコバルトマンガン複合酸化物は、サイクル特性が良く、低抵抗で高出力が得られ電池特性に優れた材料として注目され、近年、さらには高出力化に必要な低抵抗化が重要視されている。
例えば、特許文献1には、Mo、W、Nb、Ta及びReから選ばれる1種以上の元素が、Mn、Ni及びCoの合計モル量に対して0.1~5モル%含有されているリチウム二次電池正極材料用リチウム遷移金属系化合物粉体が提案され、一次粒子の表面部分のLi並びにMo、W、Nb、Ta及びRe以外の金属元素の合計に対するMo、W、Nb 、Ta及びReの合計の原子比が、一次粒子全体の該原子比の5倍以上であることが好ましいとされている。
この提案によれば、リチウム二次電池正極材料用リチウム遷移金属系化合物粉体の低コスト化及び高安全性化と高負荷特性、粉体取り扱い性向上の両立を図ることができる。
特に、粒子の表面にモリブデン、バナジウム、タングステン、ホウ素およびフッ素からなる群から選ばれる少なくとも1種を有する化合物を有することにより、導電性が向上することにより、熱安定性、負荷特性および出力特性の向上を損なうことなく、初期特性が向上することが開示されている。
また、開示されている製造方法によれば、添加元素をリチウム化合物と同時に熱処理した水酸化物と混合して焼成するため、添加元素の一部が層状に配置されているニッケルと置換してしまい電池特性の低下を招く問題があった。
この提案は、リチウムイオン二次電池のさらなる高容量化・高エネルギー密度化や大型化に対応するため、高い初期放電容量を大きく劣化させずに、熱的な安定性が良好な正極活物質を提供することを目的としたものであって、出力特性の改善については何ら言及されていない。
例えば、特許文献4には、金属酸化物担体と、その金属酸化物担体上に担持され、金属酸化物担体よりも酸性度の高い、リチウムイオン伝導性基又はリチウムイオン伝導性金属酸化物とを有することを特徴とするリチウムイオン伝導性向上材が提案されている。
この提案によれば、その伝導性向上材を用いることで効果的にリチウムイオン伝導性を向上させ、電池におけるリチウムイオン抵抗を低減することができるとある。
本発明の非水系電解質二次電池用正極材料は、一般式LizNi1-x-yCoxMyO2(ただし、0.10≦x≦0.35、0≦y≦0.35、0.97≦z≦1.20、Mは添加元素であり、Mn、V、Mg、Mo、Nb、TiおよびAlから選ばれる少なくとも1種の元素)で表され、一次粒子および前記一次粒子が凝集して構成された二次粒子からなるリチウム金属複合酸化物粉末とタングステン酸リチウムの混合物を含むことを特徴とするものである。
本発明においては、母材となる正極活物質として上記一般式で表されるリチウム金属複合酸化物粉末を用いることにより、高い充放電容量を得る。さらに、リチウム金属複合酸化物粉末とタングステン酸リチウムを混合することにより、充放電容量を維持しながら出力特性を向上させるものである。
一方で、リチウムイオン伝導率が高い化合物は、リチウムイオンの移動を促す効果があるため、正極活物質の表面をこのような化合物で被覆することで、逆に正極活物質の表面におけるインターカレーションの促進が可能であるが、被覆するためには熱処理等の後処理が必要であり、正極活物質が有する優れた電池特性の劣化を招く恐れもある。
また、粒子径が10μmを超えると、正極材料内にタングステン酸リチウムを均一に分散させることができず、反応抵抗の低減効果が十分に得られない場合がある。平均粒径は、レーザー回折散乱法における体積積算平均値を用いて測定することができる。
なお、粒子径が上記範囲を超える場合には、混合前に粉砕することが好ましい。
Li/Meが0.97未満であると、上記正極材料を用いた非水系電解質二次電池における正極の反応抵抗が大きくなるため、電池の出力が低くなってしまう。また、Li/Meが1.20を超えると、正極活材料の放電容量が低下するとともに、正極の反応抵抗も増加してしまう。より大きな放電容量を得るためには、Li/Meを1.10以下とすることが好ましい。
一方、Coの添加量を示すxが0.10未満になると、サイクル特性や熱安定性が十分に得られない。電池に用いたときに十分な電池容量を得るためには、Mの添加量を示すyを0.15以下とすることが好ましい。
リチウム金属複合酸化物粉末とタングステン酸リチウムを混合することにより得られる効果は、たとえば、リチウムコバルト系複合酸化物、リチウムマンガン系複合酸化物、リチウムニッケルコバルトマンガン系複合酸化物など、本発明で掲げた正極活物質だけでなく一般的に使用されるリチウム二次電池用正極活物質にも適用できる。
その混合には、一般的な混合機を使用することができ、例えば、シェーカーミキサーやレーディゲミキサー、ジュリアミキサー、Vブレンダーなどを用いてリチウム金属複合酸化物粒子の形骸が破壊されない程度でタングステン酸リチウムと十分に混合してやればよい。これにより、タングステン酸リチウムを、リチウム金属複合酸化物粉末に均一に分布させることができる。
水洗は、公知の方法および条件でよく、リチウム金属複合酸化物粉末から過度にリチウムが溶出して電池特性が劣化しない範囲で行えばよい。
水洗した場合には、乾燥してからタングステン酸リチウムと混合しても、固液分離のみで乾燥せずにタングステン酸リチウムと混合した後乾燥しても、いずれの方法でもよい。乾燥は、公知の方法および条件でよく、リチウム金属複合酸化物の電池特性が劣化しない範囲で行えばよい。
本発明の非水系電解質二次電池は、正極、負極および非水系電解液などからなり、一般の非水系電解質二次電池と同様の構成要素により構成される。なお、以下で説明する実施形態は例示に過ぎず、本発明の非水系電解質二次電池は、本明細書に記載されている実施形態を基に、当業者の知識に基づいて種々の変更、改良を施した形態で実施することができる。また、本発明の非水系電解質二次電池は、その用途を特に限定するものではない。
本発明による非水系電解質二次電池用正極材料を用いて、例えば、以下のようにして、非水系電解質二次電池の正極を作製する。
まず、粉末状の正極材料、導電材、結着剤を混合し、さらに必要に応じて活性炭、粘度調整等の目的の溶剤を添加し、これを混練して正極合材ペーストを作製する。
ここで、正極合材ペースト中のそれぞれの混合比も、非水系電解質二次電池の性能を決定する重要な要素となる。そのため、溶剤を除いた正極合材の固形分の全質量を100質量部とした場合、一般の非水系電解質二次電池の正極と同様、正極活物質の含有量を60~95質量部とし、導電材の含有量を1~20質量部とし、結着剤の含有量を1~20質量部とすることが望ましい。
このようにして、シート状の正極を作製することができる。
作製したシート状の正極は、目的とする電池に応じて適当な大きさに裁断等をして、電池の作製に供することができる。ただし、正極の作製方法は、前記例示のものに限られることなく、他の方法によってもよい。
結着剤は、活物質粒子をつなぎ止める役割を果たすもので、例えば、ポリフッ化ビニリデン(PVDF)、ポリテトラフルオロエチレン(PTFE)、フッ素ゴム、エチレンプロピレンジエンゴム、スチレンブタジエン、セルロース系樹脂、ポリアクリル酸などを用いることができる。
必要に応じ、正極活物質、導電材、活性炭を分散させ、結着剤を溶解する溶剤を正極合材に添加する。溶剤としては、具体的には、N-メチル-2-ピロリドン等の有機溶剤を用いることができる。また、正極合材には、電気二重層容量を増加させるために、活性炭を添加することができる。
負極には、金属リチウムやリチウム合金等、あるいは、リチウムイオンを吸蔵および脱離できる負極活物質に、結着剤を混合し、適当な溶剤を加えてペースト状にした負極合材を、銅等の金属箔集電体の表面に塗布し、乾燥し、必要に応じて電極密度を高めるべく圧縮して形成したものを使用する。
正極と負極との間には、セパレータを挟み込んで配置する。
セパレータは、正極と負極とを分離し、電解質を保持するものであり、ポリエチレン、ポリプロピレン等の薄い膜で、微少な孔を多数有する膜を用いることができる。
非水系電解液は、支持塩としてのリチウム塩を有機溶媒に溶解したものである。
有機溶媒としては、エチレンカーボネート、プロピレンカーボネート、ブチレンカーボネート、トリフルオロプロピレンカーボネート等の環状カーボネート、また、ジエチルカーボネート、ジメチルカーボネート、エチルメチルカーボネート、ジプロピルカーボネート等の鎖状カーボネート、さらに、テトラヒドロフラン、2-メチルテトラヒドロフラン、ジメトキシエタン等のエーテル化合物、エチルメチルスルホン、ブタンスルトン等の硫黄化合物、リン酸トリエチル、リン酸トリオクチル等のリン化合物等から選ばれる1種を単独で、あるいは2種以上を混合して用いることができる。
さらに、非水系電解液は、ラジカル捕捉剤、界面活性剤および難燃剤等を含んでいてもよい。
以上のように説明してきた正極、負極、セパレータおよび非水系電解液で構成される本発明の非水系電解質二次電池の形状は、円筒型、積層型等、種々のものとすることができる。
いずれの形状を採る場合であっても、正極および負極を、セパレータを介して積層させて電極体とし、得られた電極体に、非水系電解液を含浸させ、正極集電体と外部に通ずる正極端子との間、および、負極集電体と外部に通ずる負極端子との間を、集電用リード等を用いて接続し、電池ケースに密閉して、非水系電解質二次電池を完成させる。
本発明の正極活物質を用いた非水系電解質二次電池は、高容量で高出力となる。
特により好ましい形態で得られた正極活物質を用いた非水系電解質二次電池は、例えば、2032型コイン電池の正極に用いた場合、165mAh/g以上の高い初期放電容量と低い正極抵抗が得られ、さらに高容量で高出力である。また、熱安定性が高く、安全性においても優れているものである。
電気化学的評価手法として一般的な交流インピーダンス法にて電池反応の周波数依存性について測定を行うと、溶液抵抗、負極抵抗と負極容量、および正極抵抗と正極容量に基づくナイキスト線図が図1のように得られる。
この等価回路を用いて測定したナイキスト線図に対してフィッティング計算を行い、各抵抗成分、容量成分を見積もることができる。
以上のことから、作製される正極について、交流インピーダンス測定を行い、得られたナイキスト線図に対し等価回路でフィッティング計算することで、正極抵抗を見積もることができる。
以下、本発明の実施例を用いて具体的に説明するが、本発明は、これらの実施例によって何ら限定されるものではない。
正極材料の評価には、図2に示す2032型コイン電池(以下、コイン型電池1という)を使用した。
図2に示すように、コイン型電池1は、ケース2と、このケース2内に収容された電極3とから構成されている。
ケース2は、中空かつ一端が開口された正極缶2aと、この正極缶2aの開口部に配置される負極缶2bとを有しており、負極缶2bを正極缶2aの開口部に配置すると、負極缶2bと正極缶2aとの間に電極3を収容する空間が形成されるように構成されている。
なお、ケース2はガスケット2cを備えており、このガスケット2cによって、正極缶2aと負極缶2bとの間が非接触の状態を維持するように相対的な移動が固定されている。また、ガスケット2cは、正極缶2aと負極缶2bとの隙間を密封してケース2内と外部との間を気密液密に遮断する機能も有している。
まず、非水系電解質二次電池用正極材料52.5mg、アセチレンブラック15mg、およびポリテトラフッ化エチレン樹脂(PTFE)7.5mgを混合し、100MPaの圧力で直径11mm、厚み100μmにプレス成形して、正極3aを作製した。次に作製した正極3aを真空乾燥機中120℃で12時間乾燥した。
乾燥した正極3aと、負極3b、セパレータ3cおよび電解液とを用いて、図2のコイン型電池1を、露点が-80℃に管理されたAr雰囲気のグローブボックス内で作製した。
また、セパレータ3cには、膜厚25μmのポリエチレン多孔膜を用いた。
電解液は、1MのLiClO4を支持電解質とするエチレンカーボネート(EC)とジエチルカーボネート(DEC)の等量混合液(富山薬品工業株式会社製)を用いた。
初期放電容量は、コイン型電池1を製作してから24時間程度放置し、開回路電圧OCV(open circuit voltage)が安定した後、正極に対する電流密度を0.1mA/cm2としてカットオフ電圧4.3Vまで充電し、1時間の休止後、カットオフ電圧3.0Vまで放電したときの容量を初期放電容量とした。
なお、本実施例では、複合水酸化物製造、正極活物質および二次電池の作製には、和光純薬工業株式会社製試薬特級の各試料を使用した。
この正極材料中のタングステン含有量をICP法により分析したところ、ニッケル、コバルトおよびMの原子数の合計に対して0.50原子%の組成であることを確認した。これより、タングステン酸リチウム粉末とリチウム金属複合酸化物粉末の混合物の配合と正極材料の組成が同等であることも確認した。
得られた正極材料を用いて形成された正極を有するコイン型電池1について、電池特性を評価した。なお、正極抵抗の評価に際しては、この実施例1を100とした相対値を評価値として用いた。
実施例1における初期放電容量は182.7mAh/g、500サイクル後の放電容量は170.6mAh/gであった。
実施例1で母材として用いたリチウム金属複合酸化物粉末を正極活物質(正極材料)に用いてコイン型電池を作成し、その電池評価を行った。
実施例1~7の正極材料は、本発明に従って製造されたため、この正極材料を用いた非水系電解質二次電池は、初期放電容量が高く、正極抵抗も低いものとなっており、優れた特性を有した電池が得られることが確認された。特に、添加したタングステン酸リチウム量を好ましい条件で実施した実施例1~6は、初期放電容量と正極抵抗がさら良好であり、非水系電解質二次電池用正極材料として一層好適なものとなっている。特に実施例6は、初期放電容量と正極抵抗がともに良好である。
以上の結果より、本発明の正極材料を用いた非水系電解質二次電池は、初期放電容量が高く、正極抵抗も低いものとなり、優れた特性を有した電池となることが確認できる。
また、本発明の非水系電解質二次電池は、優れた安全性を有し、小型化、高出力化が可能であることから、搭載スペースに制約を受ける電気自動車用電源として好適である。
なお、本発明は、純粋に電気エネルギーで駆動する電気自動車用の電源のみならず、ガソリンエンジンやディーゼルエンジンなどの燃焼機関と併用するいわゆるハイブリッド車用の電源としても用いることができる。
2 ケース
2a 正極缶
2b 負極缶
2c ガスケット
3 電極
3a 正極
3b 負極
3c セパレータ
Claims (9)
- 一般式LizNi1-x-yCoxMyO2(ただし、0.10≦x≦0.35、0≦y≦0.35、0.97≦z≦1.20、Mは添加元素であり、Mn、V、Mg、Mo、Nb、TiおよびAlから選ばれる少なくとも1種の元素)で表され、一次粒子および前記一次粒子が凝集して構成された二次粒子からなるリチウム金属複合酸化物粉末と、タングステン酸リチウムを混合すること特徴とする非水系電解質二次電池用正極材料の製造方法。
- 前記リチウム金属複合酸化物粉末とタングステン酸リチウムの混合前に、前記リチウム金属複合酸化物粉末を水洗する工程を含むことを特徴とする請求項1に記載の非水系電解質二次電池用正極材料の製造方法。
- 前記正極材料に含まれるタングステン量が、リチウム金属複合酸化物粉末に含まれるニッケル、コバルトおよびMの原子数の合計に対して、0.1~3.0原子%であることを特徴とする請求項1または2に記載の非水系電解質二次電池用正極材料の製造方法。
- 前記タングステン酸リチウムが、Li2WO4、Li4WO5、Li6W2O9から選択される少なくとも1種であることを特徴とする請求項1~3のいずれかに記載の非水系電解質二次電池用正極材料の製造方法。
- 一般式LizNi1-x-yCoxMyO2(ただし、0.10≦x≦0.35、0≦y≦0.35、0.97≦z≦1.20、Mは添加元素であり、Mn、V、Mg、Mo、Nb、TiおよびAlから選ばれる少なくとも1種の元素)で表され、一次粒子および前記一次粒子が凝集して構成された二次粒子からなるリチウム金属複合酸化物粉末とタングステン酸リチウムの混合物を含むこと特徴とする非水系電解質二次電池用正極材料。
- 前記正極材料に含まれるタングステン量が、リチウム金属複合酸化物粉末に含まれるニッケル、コバルトおよびMの原子数の合計に対して、0.1~3.0原子%であることを特徴とする請求項5に記載の非水系電解質二次電池用正極材料。
- 前記タングステン酸リチウムが、Li2WO4、Li4WO5、Li6W2O9から選択される少なくとも1種であることを特徴とする請求項5または6に記載の非水系電解質二次電池用正極材料。
- 前記タングステン酸リチウムが、Li4WO5を含むものであることを特徴とする請求項7に記載の非水系電解質二次電池用正極材料。
- 請求項5~8のいずれかに記載の非水系電解質二次電池用正極材料を含む正極を有することを特徴とする非水系電解質二次電池。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP13751366.9A EP2819226B1 (en) | 2012-02-22 | 2013-02-14 | Positive-electrode material for nonaqueous-electrolyte secondary battery, manufacturing method therefor, and nonaqueous-electrolyte secondary battery using said positive-electrode material |
| US14/379,924 US9991505B2 (en) | 2012-02-22 | 2013-02-14 | Positive-electrode material for nonaqueous-electrolyte secondary battery, method for manufacturing the same, and nonaqueous-electrolyte secondary battery using said positive-electrode material |
| KR1020147012633A KR101675208B1 (ko) | 2012-02-22 | 2013-02-14 | 비수계 전해질 이차 전지용 양극 재료와 그의 제조 방법, 및 이 양극 재료를 이용한 비수계 전해질 이차 전지 |
| CN201380004167.9A CN103988349B (zh) | 2012-02-22 | 2013-02-14 | 非水系电解质二次电池用正极材料及其制造方法、及使用了该正极材料的非水系电解质二次电池 |
| US15/381,171 US10090514B2 (en) | 2012-02-22 | 2016-12-16 | Positive-electrode material for nonaqueous-electrolyte secondary battery, method for manufacturing the same, and nonaqueous-electrolyte secondary battery using said positive-electrode material |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-036344 | 2012-02-22 | ||
| JP2012036344A JP5370515B2 (ja) | 2012-02-22 | 2012-02-22 | 非水系電解質二次電池用正極材料とその製造方法、および該正極材料を用いた非水系電解質二次電池 |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US14/379,924 A-371-Of-International US9991505B2 (en) | 2012-02-22 | 2013-02-14 | Positive-electrode material for nonaqueous-electrolyte secondary battery, method for manufacturing the same, and nonaqueous-electrolyte secondary battery using said positive-electrode material |
| US15/381,171 Division US10090514B2 (en) | 2012-02-22 | 2016-12-16 | Positive-electrode material for nonaqueous-electrolyte secondary battery, method for manufacturing the same, and nonaqueous-electrolyte secondary battery using said positive-electrode material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2013125426A1 true WO2013125426A1 (ja) | 2013-08-29 |
Family
ID=49005613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2013/053472 Ceased WO2013125426A1 (ja) | 2012-02-22 | 2013-02-14 | 非水系電解質二次電池用正極材料とその製造方法、および該正極材料を用いた非水系電解質二次電池 |
Country Status (6)
| Country | Link |
|---|---|
| US (2) | US9991505B2 (ja) |
| EP (1) | EP2819226B1 (ja) |
| JP (1) | JP5370515B2 (ja) |
| KR (1) | KR101675208B1 (ja) |
| CN (1) | CN103988349B (ja) |
| WO (1) | WO2013125426A1 (ja) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015141179A1 (ja) * | 2014-03-17 | 2015-09-24 | 三洋電機株式会社 | 非水電解質二次電池 |
| CN106256036A (zh) * | 2014-04-25 | 2016-12-21 | 住友金属矿山株式会社 | 非水系电解质二次电池用正极活性物质与其制造方法、以及使用该正极活性物质的非水系电解质二次电池 |
| WO2017038041A1 (ja) * | 2015-08-28 | 2017-03-09 | パナソニックIpマネジメント株式会社 | 非水電解質二次電池 |
Families Citing this family (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6589856B2 (ja) * | 2014-02-28 | 2019-10-16 | 三洋電機株式会社 | 非水電解質二次電池 |
| JP6730777B2 (ja) * | 2014-08-29 | 2020-07-29 | 住友金属鉱山株式会社 | 非水系電解質二次電池用正極材料とその製造方法、および該正極材料を用いた非水系電解質二次電池 |
| JP6090609B2 (ja) * | 2014-11-28 | 2017-03-08 | 住友金属鉱山株式会社 | 非水系電解質二次電池用正極活物質とその製造方法、および該正極活物質を用いた非水系電解質二次電池 |
| JP6090608B2 (ja) * | 2014-11-28 | 2017-03-08 | 住友金属鉱山株式会社 | 非水系電解質二次電池用正極活物質とその製造方法、および該正極活物質を用いた非水系電解質二次電池 |
| JP6555636B2 (ja) * | 2015-03-03 | 2019-08-07 | 住友金属鉱山株式会社 | 非水系電解質二次電池用正極活物質およびその製造方法 |
| WO2016140207A1 (ja) * | 2015-03-03 | 2016-09-09 | 住友金属鉱山株式会社 | 非水系電解質二次電池用正極活物質およびその製造方法 |
| JP6544579B2 (ja) * | 2015-03-25 | 2019-07-17 | 住友金属鉱山株式会社 | タングステン酸リチウムの製造方法、およびタングステン酸リチウムを用いた非水系電解質二次電池用正極活物質の製造方法 |
| JP6978182B2 (ja) * | 2015-04-24 | 2021-12-08 | 住友金属鉱山株式会社 | 非水系電解質二次電池用正極活物質とその製造方法、および該正極活物質を用いた非水系電解質二次電池 |
| JP6998107B2 (ja) * | 2015-05-29 | 2022-01-18 | 住友金属鉱山株式会社 | 非水系電解質二次電池用正極材料、正極合材、およびそれぞれを用いた非水系電解質二次電池 |
| EP3331069B1 (en) * | 2015-07-30 | 2024-03-06 | Sumitomo Metal Mining Co., Ltd. | Nonaqueous electrolyte secondary battery positive electrode active material and nonaqueous electrolyte secondary battery |
| JP6651789B2 (ja) * | 2015-10-28 | 2020-02-19 | 住友金属鉱山株式会社 | 非水系電解質二次電池用正極活物質とその製造方法、及び非水系電解質二次電池 |
| JP6773047B2 (ja) * | 2015-11-27 | 2020-10-21 | 住友金属鉱山株式会社 | 非水系電解質二次電池用正極材料とその製造方法、および正極合材ペースト、非水系電解質二次電池。 |
| JP6724361B2 (ja) * | 2015-12-25 | 2020-07-15 | 住友金属鉱山株式会社 | 非水系電解質二次電池用正極活物質とその製造方法、及び非水系電解質二次電池 |
| JP2017188292A (ja) * | 2016-04-05 | 2017-10-12 | ユミコア | リチウム−ニッケル−コバルト−アルミニウム複合酸化物粉末 |
| JP6378246B2 (ja) | 2016-05-09 | 2018-08-22 | トヨタ自動車株式会社 | 正極活物質、及び、当該正極活物質を用いたリチウムイオン二次電池 |
| CN109155403B (zh) * | 2016-05-27 | 2021-12-03 | 尤米科尔公司 | 用于锂离子电池组的正电极 |
| JP6361841B2 (ja) * | 2016-05-30 | 2018-07-25 | 日立金属株式会社 | リチウムイオン二次電池用正極活物質及びそれを含む正極、並びにその正極を備えるリチウムイオン二次電池 |
| CN106058217B (zh) * | 2016-08-11 | 2019-08-09 | 复旦大学 | 一种钨酸锂材料及其制备与应用 |
| JP7159535B2 (ja) * | 2017-01-27 | 2022-10-25 | 住友金属鉱山株式会社 | タングステン酸リチウム、タングステン酸リチウムの製造方法、タングステン酸リチウムの製造装置、非水系電解質二次電池用正極材料、及び非水系電解質二次電池 |
| US10784500B2 (en) | 2017-05-01 | 2020-09-22 | Sumitomo Metal Mining Co., Ltd. | Positive electrode active material for nonaqueous electrolyte secondary battery, method for producing the same, and nonaqueous electrolyte secondary battery |
| KR102337646B1 (ko) | 2017-06-23 | 2021-12-10 | 스미토모 긴조쿠 고잔 가부시키가이샤 | 비수계 전해질 이차 전지용 정극 활물질과 그의 제조 방법, 및 비수계 전해질 이차 전지 |
| WO2019013053A1 (ja) * | 2017-07-12 | 2019-01-17 | 住友金属鉱山株式会社 | 金属複合水酸化物とその製造方法、非水電解質二次電池用正極活物質とその製造方法、及び、それを用いた非水電解質二次電池 |
| JP6818235B2 (ja) * | 2017-09-11 | 2021-01-20 | トヨタ自動車株式会社 | 非水電解液二次電池 |
| JP6883263B2 (ja) * | 2017-09-11 | 2021-06-09 | トヨタ自動車株式会社 | 非水電解液二次電池 |
| JP7332611B2 (ja) | 2018-02-26 | 2023-08-23 | ユミコア | Liイオンバッテリー用の正極スラリー |
| JP6962838B2 (ja) * | 2018-03-13 | 2021-11-05 | 住友化学株式会社 | リチウム金属複合酸化物粉末、リチウム二次電池用正極活物質、正極、及びリチウム二次電池 |
| JP7276323B2 (ja) | 2018-03-29 | 2023-05-18 | 住友金属鉱山株式会社 | 非水系電解質二次電池用正極活物質 |
| KR102379561B1 (ko) * | 2020-03-05 | 2022-03-28 | 삼성에스디아이 주식회사 | 리튬이차전지용 복합양극활물질, 그 제조방법 및 이를 포함하는 양극을 함유한 리튬이차전지 |
| US12159996B2 (en) | 2020-03-25 | 2024-12-03 | Samsung Sdi Co., Ltd. | Positive electrode active material, positive electrode including the same, and lithium secondary battery employing the positive electrode |
| JP7148937B2 (ja) * | 2020-10-13 | 2022-10-06 | 国立大学法人信州大学 | リチウムイオン二次電池の正極の製造方法 |
| KR20230120667A (ko) * | 2020-12-18 | 2023-08-17 | 유미코아 | 재충전 가능한 배터리용 양극 활물질의 제조 방법 |
| CN112768628A (zh) * | 2021-02-05 | 2021-05-07 | 远景动力技术(江苏)有限公司 | 一种正极极片及其制备方法和应用 |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002075367A (ja) | 2000-09-04 | 2002-03-15 | Mitsui Chemicals Inc | リチウム電池用正極活物質、その製法およびそれを用いた二次電池 |
| JP2005251716A (ja) | 2004-02-05 | 2005-09-15 | Nichia Chem Ind Ltd | 非水電解質二次電池用正極活物質、非水電解質二次電池用正極合剤および非水電解質二次電池 |
| JP2005320184A (ja) * | 2004-05-06 | 2005-11-17 | Nippon Denko Kk | リチウムマンガン複合酸化物及びその製造方法 |
| JP2008285388A (ja) | 2007-05-21 | 2008-11-27 | Toyota Motor Corp | リチウムイオン伝導性向上材 |
| JP2009289726A (ja) | 2008-05-01 | 2009-12-10 | Mitsubishi Chemicals Corp | リチウム遷移金属系化合物粉体、その製造方法及びその焼成前駆体となる噴霧乾燥体、並びに、それを用いたリチウム二次電池用正極及びリチウム二次電池 |
| JP2010040383A (ja) * | 2008-08-06 | 2010-02-18 | Sony Corp | 正極活物質の製造方法および正極活物質 |
| JP2011216214A (ja) * | 2010-03-31 | 2011-10-27 | Nichia Corp | 非水電解質二次電池用正極活物質及び非水電解質二次電池 |
| JP4915488B1 (ja) * | 2011-03-28 | 2012-04-11 | 住友金属鉱山株式会社 | ニッケルマンガン複合水酸化物粒子とその製造方法、非水系電解質二次電池用正極活物質とその製造方法、および非水系電解質二次電池 |
| JP2012079464A (ja) * | 2010-09-30 | 2012-04-19 | Sumitomo Metal Mining Co Ltd | 非水系電解質二次電池用正極活物質とその製造方法、および該正極活物質を用いた非水系電解質二次電池 |
| JP2012099271A (ja) * | 2010-10-29 | 2012-05-24 | Sanyo Electric Co Ltd | 非水電解質二次電池 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2110872B1 (en) | 2006-12-26 | 2014-02-12 | Mitsubishi Chemical Corporation | Lithium transition metal compound powder, process for production thereof, spray-dried product as precursor, positive electrode for lithium secondary battery and lithium secondary battery made by using the same |
| WO2009031619A1 (ja) | 2007-09-04 | 2009-03-12 | Mitsubishi Chemical Corporation | リチウム遷移金属系化合物粉体、その製造方法及びその焼成前駆体となる噴霧乾燥体、並びに、それを用いたリチウム二次電池用正極及びリチウム二次電池 |
| JP5287520B2 (ja) | 2008-09-02 | 2013-09-11 | 住友化学株式会社 | 電極活物質、電極および非水電解質二次電池 |
-
2012
- 2012-02-22 JP JP2012036344A patent/JP5370515B2/ja active Active
-
2013
- 2013-02-14 US US14/379,924 patent/US9991505B2/en active Active
- 2013-02-14 CN CN201380004167.9A patent/CN103988349B/zh active Active
- 2013-02-14 EP EP13751366.9A patent/EP2819226B1/en active Active
- 2013-02-14 WO PCT/JP2013/053472 patent/WO2013125426A1/ja not_active Ceased
- 2013-02-14 KR KR1020147012633A patent/KR101675208B1/ko active Active
-
2016
- 2016-12-16 US US15/381,171 patent/US10090514B2/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002075367A (ja) | 2000-09-04 | 2002-03-15 | Mitsui Chemicals Inc | リチウム電池用正極活物質、その製法およびそれを用いた二次電池 |
| JP2005251716A (ja) | 2004-02-05 | 2005-09-15 | Nichia Chem Ind Ltd | 非水電解質二次電池用正極活物質、非水電解質二次電池用正極合剤および非水電解質二次電池 |
| JP2005320184A (ja) * | 2004-05-06 | 2005-11-17 | Nippon Denko Kk | リチウムマンガン複合酸化物及びその製造方法 |
| JP2008285388A (ja) | 2007-05-21 | 2008-11-27 | Toyota Motor Corp | リチウムイオン伝導性向上材 |
| JP2009289726A (ja) | 2008-05-01 | 2009-12-10 | Mitsubishi Chemicals Corp | リチウム遷移金属系化合物粉体、その製造方法及びその焼成前駆体となる噴霧乾燥体、並びに、それを用いたリチウム二次電池用正極及びリチウム二次電池 |
| JP2010040383A (ja) * | 2008-08-06 | 2010-02-18 | Sony Corp | 正極活物質の製造方法および正極活物質 |
| JP2011216214A (ja) * | 2010-03-31 | 2011-10-27 | Nichia Corp | 非水電解質二次電池用正極活物質及び非水電解質二次電池 |
| JP2012079464A (ja) * | 2010-09-30 | 2012-04-19 | Sumitomo Metal Mining Co Ltd | 非水系電解質二次電池用正極活物質とその製造方法、および該正極活物質を用いた非水系電解質二次電池 |
| JP2012099271A (ja) * | 2010-10-29 | 2012-05-24 | Sanyo Electric Co Ltd | 非水電解質二次電池 |
| JP4915488B1 (ja) * | 2011-03-28 | 2012-04-11 | 住友金属鉱山株式会社 | ニッケルマンガン複合水酸化物粒子とその製造方法、非水系電解質二次電池用正極活物質とその製造方法、および非水系電解質二次電池 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP2819226A4 |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015141179A1 (ja) * | 2014-03-17 | 2015-09-24 | 三洋電機株式会社 | 非水電解質二次電池 |
| JPWO2015141179A1 (ja) * | 2014-03-17 | 2017-04-06 | 三洋電機株式会社 | 非水電解質二次電池 |
| US10511021B2 (en) | 2014-03-17 | 2019-12-17 | Sanyo Electric Co., Ltd. | Non-aqueous electrolyte secondary battery |
| CN106256036A (zh) * | 2014-04-25 | 2016-12-21 | 住友金属矿山株式会社 | 非水系电解质二次电池用正极活性物质与其制造方法、以及使用该正极活性物质的非水系电解质二次电池 |
| CN106256036B (zh) * | 2014-04-25 | 2019-06-07 | 住友金属矿山株式会社 | 非水系电解质二次电池用正极活性物质与其制造方法、以及非水系电解质二次电池 |
| WO2017038041A1 (ja) * | 2015-08-28 | 2017-03-09 | パナソニックIpマネジメント株式会社 | 非水電解質二次電池 |
| JPWO2017038041A1 (ja) * | 2015-08-28 | 2018-06-14 | パナソニックIpマネジメント株式会社 | 非水電解質二次電池 |
| US20180248220A1 (en) * | 2015-08-28 | 2018-08-30 | Panasonic Intellectual Property Management Co., Ltd. | Nonaqueous electrolyte secondary batteries |
Also Published As
| Publication number | Publication date |
|---|---|
| US20170098821A1 (en) | 2017-04-06 |
| US20150021518A1 (en) | 2015-01-22 |
| EP2819226A1 (en) | 2014-12-31 |
| JP2013171785A (ja) | 2013-09-02 |
| CN103988349B (zh) | 2017-10-31 |
| EP2819226A4 (en) | 2015-08-05 |
| CN103988349A (zh) | 2014-08-13 |
| KR101675208B1 (ko) | 2016-11-10 |
| JP5370515B2 (ja) | 2013-12-18 |
| EP2819226B1 (en) | 2018-11-07 |
| US9991505B2 (en) | 2018-06-05 |
| KR20140076618A (ko) | 2014-06-20 |
| US10090514B2 (en) | 2018-10-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5370515B2 (ja) | 非水系電解質二次電池用正極材料とその製造方法、および該正極材料を用いた非水系電解質二次電池 | |
| JP2013171785A5 (ja) | ||
| JP5822708B2 (ja) | 非水系電解質二次電池用正極活物質とその製造方法、および該正極活物質を用いた非水系電解質二次電池 | |
| JP5772626B2 (ja) | 非水系電解質二次電池用正極活物質とその製造方法、および該正極活物質を用いた非水系電解質二次電池 | |
| JP5035712B2 (ja) | 非水系電解質二次電池用正極活物質とその製造方法、および該正極活物質を用いた非水系電解質二次電池 | |
| JP6210439B2 (ja) | 非水系電解質二次電池用正極活物質とその製造方法、及び該正極活物質を用いた非水系電解質二次電池 | |
| JP2012079464A5 (ja) | ||
| WO2017018099A1 (ja) | 非水電解質二次電池用正極活物質および非水電解質二次電池 | |
| JP6998107B2 (ja) | 非水系電解質二次電池用正極材料、正極合材、およびそれぞれを用いた非水系電解質二次電池 | |
| JP6582750B2 (ja) | 非水系電解質二次電池用正極活物質の製造方法 | |
| JP2017117766A (ja) | 非水系電解質二次電池用正極活物質とその製造方法、及び非水系電解質二次電池 | |
| JP6819859B2 (ja) | 非水系電解質二次電池用正極材料、該正極材料を用いた非水系電解質二次電池、および非水系電解質二次電池用正極材料の製造方法。 | |
| JP6848199B2 (ja) | 非水系電解質二次電池用正極材料、該正極材料を用いた非水系電解質二次電池、および非水系電解質二次電池用正極材料の製造方法。 | |
| JP2018195419A (ja) | 非水系電解質二次電池用正極材料、該正極材料を用いた非水系電解質二次電池、および非水系電解質二次電池用正極材料の製造方法。 | |
| WO2016104305A1 (ja) | 非水系電解質二次電池用正極活物質とその製造方法、及び該正極活物質を用いた非水系電解質二次電池 | |
| JP6730777B2 (ja) | 非水系電解質二次電池用正極材料とその製造方法、および該正極材料を用いた非水系電解質二次電池 | |
| JP6819860B2 (ja) | 非水系電解質二次電池用正極材料、該正極材料を用いた非水系電解質二次電池、および非水系電解質二次電池用正極材料の製造方法。 | |
| JP6819861B2 (ja) | 非水系電解質二次電池用正極材料、該正極材料を用いた非水系電解質二次電池、および非水系電解質二次電池用正極材料の製造方法。 | |
| JP6919175B2 (ja) | 非水系電解質二次電池用正極材料、該正極材料を用いた非水系電解質二次電池、および非水系電解質二次電池用正極材料の製造方法。 | |
| JP6652744B2 (ja) | 非水電解質二次電池用セパレータ、および非水電解質二次電池 | |
| JP6600991B2 (ja) | 非水系電解質二次電池用電解液、および該電解液を用いた非水系電解質二次電池 | |
| JP2016072038A (ja) | 非水系電解質二次電池用正極活物質とその製造方法、および該正極活物質を用いた非水系電解質二次電池 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13751366 Country of ref document: EP Kind code of ref document: A1 |
|
| ENP | Entry into the national phase |
Ref document number: 20147012633 Country of ref document: KR Kind code of ref document: A |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 14379924 Country of ref document: US |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2013751366 Country of ref document: EP |
