WO2013157832A1 - 리튬 이차전지용 전극의 제조 방법 및 이를 사용하여 제조되는 전극 - Google Patents
리튬 이차전지용 전극의 제조 방법 및 이를 사용하여 제조되는 전극 Download PDFInfo
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- WO2013157832A1 WO2013157832A1 PCT/KR2013/003214 KR2013003214W WO2013157832A1 WO 2013157832 A1 WO2013157832 A1 WO 2013157832A1 KR 2013003214 W KR2013003214 W KR 2013003214W WO 2013157832 A1 WO2013157832 A1 WO 2013157832A1
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- electrode
- active material
- current collector
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- secondary battery
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- 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
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
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- 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
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
- C25D7/06—Wires; Strips; Foils
- C25D7/0614—Strips or foils
- C25D7/0692—Regulating the thickness of the coating
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- 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
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- H—ELECTRICITY
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- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
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- H01M4/04—Processes of manufacture in general
- H01M4/0471—Processes of manufacture in general involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis
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- H—ELECTRICITY
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- 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
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- 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
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- H—ELECTRICITY
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- 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
- H01M4/483—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides for non-aqueous cells
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- 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
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- 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
- H01M4/502—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese for non-aqueous cells
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- H—ELECTRICITY
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- 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
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- 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
- H01M4/523—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron for non-aqueous cells
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- H—ELECTRICITY
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- 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
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/661—Metal or alloys, e.g. alloy coatings
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M4/64—Carriers or collectors
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- H—ELECTRICITY
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- 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
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- H—ELECTRICITY
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- 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
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- 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
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention is a method for producing a secondary battery electrode and an electrode prepared by using an electrode mixture comprising an electrode active material, a binder and a conductive material on an aluminum current collector, and in detail, an oxidation of 40 nm or less in the current collector Including a process of treating the surface of the current collector so that the aluminum (Al 2 O 3 ) layer is formed, the method of manufacturing an electrode for a secondary battery, characterized in that to improve the adhesion of the electrode mixture and the current collector and the electrode manufactured using the same It is about.
- the lithium secondary battery has a structure in which a non-aqueous electrolyte containing lithium salt is impregnated in an electrode assembly having a porous separator interposed between a positive electrode and a negative electrode on which an active material is coated on an electrode current collector.
- the binder provides adhesion between the electrode active materials and between the electrode active material and the current collector, and has an important effect on battery characteristics by suppressing volume expansion due to charging and discharging of the battery.
- the amount of the conductive material or the electrode active material is relatively decreased, so that the conductivity of the electrode is reduced or the battery capacity is reduced. There may be a problem that the process of applying the electrode is not easy to be diluted.
- the present invention aims to solve the problems of the prior art as described above and the technical problems that have been requested from the past.
- the inventors of the present application treated the surface of an aluminum current collector to form an aluminum oxide (Al 2 O 3 ) layer of 40 nm or less, as described later. When applying, it was confirmed that the desired effect can be achieved, and the present invention was completed.
- the present invention is a method for manufacturing a secondary battery electrode, the electrode mixture comprising an electrode active material, a binder and a conductive material is applied to an aluminum current collector, the aluminum oxide (Al 2 O 3 ) layer of 40 nm or less on the current collector
- the present invention relates to a method of manufacturing an electrode for a secondary battery, including improving the adhesion between the electrode mixture and the current collector, including the step of treating the surface of the current collector to be formed.
- Al 2 O 3 aluminum oxide
- Al 2 O 3 natural aluminum oxide
- the aluminum oxide layer not only prevents corrosion of the aluminum current collector that may occur during the operation of the battery cell, but also has a porous shape, thereby increasing the contact area between the electrode mixture and the electrode, thereby improving charge and discharge cycle characteristics.
- the overall performance of the secondary battery can be improved.
- the aluminum oxide (Al 2 O 3 ) layer may be partially decomposed during the high voltage charge and discharge process of the battery, it is necessary to make the aluminum oxide layer thicker.
- the present invention includes a process of surface treatment to be formed on the aluminum current collector in a thickness of 10 to 40 nm, more specifically 20 to 30 nm in detail.
- the thickness of the aluminum oxide layer is an optimal range to improve the overall performance of the battery while increasing the electrode mixture and adhesive force. If the aluminum oxide layer is too thick, the electrode mixture and adhesive force increases but the ion conductivity decreases, which is undesirable. If the aluminum oxide layer is too thin, the effect of increasing the adhesive strength and the electrode mixture desired by the present invention may be inferior.
- the method of forming the aluminum oxide layer by treating the surface of the aluminum current collector is not limited as long as it is known in the art, but the aluminum oxide layer having a specific thickness as in the present invention may be formed through heat treatment or electrical treatment in detail. Can be.
- the heat treatment may be performed for 0.5 to 5 hours at 1 to 150 mTorr in an oxygen atmosphere of 100 to 500 ° C., more specifically 30 to 100 mTorr in an oxygen atmosphere of 200 to 450 ° C. In 1 to 3 hours.
- the temperature, pressure, and time range defined above are not preferable because the desired effect cannot be obtained when the temperature, pressure, and time range are outside the above defined ranges as conditions for obtaining an aluminum oxide layer having a desired thickness according to the present invention.
- the electrical treatment may be performed for 1 to 5 hours under a current density of 1 mA / cm 2 to 200 mA / cm 2 at an applied voltage of 30 to 300 V.
- the electrical treatment is performed by applying a voltage to the current collector, according to the electrode oxidation method, and may be performed by supporting the current collector in an acidic solution such as about 10 to 20% sulfuric acid.
- Such heat treatment conditions or electrical material treatment conditions can be determined in the conditions under which the thickness of the aluminum oxide formed on the surface of the aluminum current collector defined in the present invention can be formed.
- the electrode may be an anode or a cathode, or an anode and a cathode.
- the positive electrode for a secondary battery is manufactured by applying a mixture of a positive electrode active material, a conductive material and a binder on a positive electrode current collector, then drying and pressing, and optionally adding a filler to the mixture.
- the positive electrode current collector is generally made to a thickness of 3 to 500 ⁇ m. Such a positive electrode current collector is not particularly limited as long as it has high conductivity without causing chemical change in the battery, but may be aluminum as described above.
- the cathode active material may include a lithium metal oxide having a spinel structure represented by Formula 1 below.
- M is Al, Mg, Ni, Co, Fe, Cr, V, Ti, Cu, B, Ca, Zn, Zr, At least one element selected from the group consisting of Nb, Mo, Sr, Sb, W, Ti and Bi;
- A is -1 or -divalent one or more anions.
- the lithium metal oxide may be represented by the following Chemical Formula 2 in more detail.
- the lithium metal oxide may be LiNi 0.5 Mn 1.5 O 4 or LiNi 0.4 Mn 1.6 O 4 .
- the conductive material is typically added in an amount of 1 to 50% by weight based on the total weight of the mixture including the positive electrode active material.
- a conductive material is not particularly limited as long as it has conductivity without causing chemical change in the battery, and examples thereof include graphite such as natural graphite and artificial graphite; Carbon blacks such as carbon black, acetylene black, Ketjen black, channel black, furnace black, lamp black, and summer black; Conductive fibers such as carbon fibers and metal fibers; Metal powders such as carbon fluoride powder, aluminum powder and nickel powder; Conductive whiskeys such as zinc oxide and potassium titanate; Conductive metal oxides such as titanium oxide; Conductive materials such as polyphenylene derivatives and the like can be used.
- the binder is a component that assists in bonding the active material and the conductive material to the current collector, and is generally added in an amount of 1 to 50 wt% based on the total weight of the mixture including the positive electrode active material.
- binders include polyvinylidene fluoride, polyvinyl alcohol, carboxymethyl cellulose (CMC), starch, hydroxypropyl cellulose, regenerated cellulose, polyvinylpyrrolidone, tetrafluoroethylene, polyethylene , Polypropylene, ethylene-propylene-diene terpolymer (EPDM), sulfonated EPDM, styrene butylene rubber, fluorine rubber, various copolymers and the like.
- the filler is optionally used as a component for inhibiting expansion of the positive electrode, and is not particularly limited as long as it is a fibrous material without causing chemical change in the battery.
- the filler include olefinic polymers such as polyethylene and polypropylene; Fibrous materials, such as glass fiber and carbon fiber, are used.
- the negative electrode is prepared by coating, drying and pressing the negative electrode active material on the negative electrode current collector, and optionally, the conductive material, binder, filler, etc. may be further included as necessary.
- the negative electrode current collector is generally made of a thickness of 3 ⁇ 500 ⁇ m.
- the negative electrode current collector is not particularly limited as long as it has conductivity without causing chemical change in the battery, but may be aluminum as described above.
- the negative electrode active material may include a lithium metal oxide represented by Chemical Formula 3 below.
- M ' is at least one element selected from the group consisting of Ti, Sn, Cu, Pb, Sb, Zn, Fe, In, Al and Zr; a and b are 0.1 ⁇ a ⁇ 4; Determined according to the oxidation number of M 'in the range of 0.2 ⁇ b ⁇ 4; c is determined depending on the oxidation number in the range of 0 ⁇ c ⁇ 0.2; A is -1 or -divalent one or more anions.
- the lithium metal oxide may be represented by the following formula (4).
- the lithium metal oxide may be Li 1.33 Ti 1.67 O 4 or LiTi 2 O 4 .
- carbon such as hardly graphitized carbon and graphite carbon
- LTO lithium titanium oxide
- the electron structure of the LTO itself may be low, and thus the electrode structure may be the same as described above.
- LTO lithium titanium oxide
- the present invention also provides an electrode for secondary batteries, wherein an electrode mixture including an electrode active material conductive material and a binder is coated on an Al current collector on which a 40 nm aluminum oxide (Al 2 O 3 ) layer is formed. do.
- the aluminum oxide layer may be formed to a thickness of 10 to 40 nm, more specifically 20 to 30 nm in detail.
- the electrode active material is a positive electrode active material or a negative electrode active material, or a positive electrode active material and a negative electrode active material
- the positive electrode active material includes a lithium metal oxide of a spinel structure represented by the following formula (1)
- the negative electrode active material is an oxide represented by the following formula (3) It may include.
- M is at least one element selected from the group consisting of Al, Mg, Ni, Co, Fe, Cr, V, Ti, Cu, B, Ca, Zn, Zr, Nb, Mo, Sr, Sb, W, Ti and Bi Is;
- A is -1 or -divalent one or more anions.
- M ' is at least one element selected from the group consisting of Ti, Sn, Cu, Pb, Sb, Zn, Fe, In, Al and Zr;
- a and b are 0.1 ⁇ a ⁇ 4; Determined according to the oxidation number of M 'in the range of 0.2 ⁇ b ⁇ 4;
- c is determined depending on the oxidation number in the range of 0 ⁇ c ⁇ 0.2;
- A is -1 or -divalent one or more anions.
- the positive electrode active material and the negative electrode active material may be defined as described above, in detail, the positive electrode active material may be LiNi 0.5 Mn 1.5 O 4 or LiNi 0.4 Mn 1.6 O 4 , the negative electrode active material is Li 1.33 Ti 1.67 O 4 or LiTi It can be 2 O 4 .
- the secondary battery electrode can be manufactured by the manufacturing method as described above.
- the present invention provides a secondary battery having a structure in which a lithium salt-containing electrolyte is impregnated into an electrode assembly having a separator interposed between the positive electrode and the negative electrode.
- the separator is interposed between the anode and the cathode, and an insulating thin film having high ion permeability and mechanical strength is used.
- the pore diameter of the separator is generally from 0.01 to 10 ⁇ m ⁇ m, thickness is generally 5 ⁇ 300 ⁇ m.
- a separator for example, olefin polymers such as chemical resistance and hydrophobic polypropylene; Sheets or non-woven fabrics made of glass fibers or polyethylene are used.
- a solid electrolyte such as a polymer
- the solid electrolyte may also serve as a separator.
- the lithium salt-containing electrolyte solution is composed of an electrolyte solution and a lithium salt, and the electrolyte solution, but non-aqueous organic solvent, organic solid electrolyte, inorganic solid electrolyte and the like are used, but are not limited thereto.
- non-aqueous organic solvent examples include N-methyl-2-pyrrolidinone, propylene carbonate, ethylene carbonate, butylene carbonate, dimethyl carbonate, diethyl carbonate, and gamma Butyl lactone, 1,2-dimethoxy ethane, tetrahydroxy franc, 2-methyl tetrahydrofuran, dimethyl sulfoxide, 1,3-dioxorone, formamide, dimethylformamide, dioxolon , Acetonitrile, nitromethane, methyl formate, methyl acetate, phosphate triester, trimethoxy methane, dioxorone derivatives, sulfolane, methyl sulfolane, 1,3-dimethyl-2-imidazolidinone, propylene carbo Aprotic organic solvents such as nate derivatives, tetrahydrofuran derivatives, ethers, methyl pyroionate and ethyl propionate can be
- organic solid electrolyte examples include polyethylene derivatives, polyethylene oxide derivatives, polypropylene oxide derivatives, phosphate ester polymers, polyedgetion lysine, polyester sulfides, polyvinyl alcohols, polyvinylidene fluorides, Polymerizers containing ionic dissociating groups and the like can be used.
- Examples of the inorganic solid electrolyte include Li 3 N, LiI, Li 5 NI 2 , Li 3 N-LiI-LiOH, LiSiO 4 , LiSiO 4 -LiI-LiOH, Li 2 SiS 3 , Li 4 SiO 4 , Nitrides, halides, sulfates, and the like of Li, such as Li 4 SiO 4 —LiI-LiOH, Li 3 PO 4 —Li 2 S-SiS 2 , and the like, may be used.
- the lithium salt is a good material to be dissolved in the non-aqueous electrolyte, for example, LiCl, LiBr, LiI, LiClO 4 , LiBF 4 , LiB 10 Cl 10 , LiPF 6 , LiCF 3 SO 3 , LiCF 3 CO 2 , LiAsF 6, LiSbF 6, LiAlCl 4, CH 3 SO 3 Li, (CF 3 SO 2) 2 NLi, chloroborane lithium, lower aliphatic carboxylic acid lithium, lithium tetraphenyl borate and imide.
- pyridine triethyl phosphite, triethanolamine, cyclic ether, ethylene diamine, n-glyme, hexaphosphate triamide, nitro Benzene derivatives, sulfur, quinone imine dyes, N-substituted oxazolidinones, N, N-substituted imidazolidines, ethylene glycol dialkyl ethers, ammonium salts, pyrroles, 2-methoxy ethanol, aluminum trichloride and the like may be added. .
- a halogen-containing solvent such as carbon tetrachloride or ethylene trifluoride may be further included, and carbon dioxide gas may be further included to improve high temperature storage characteristics, and FEC (Fluoro-Ethylene) may be further included. Carbonate), PRS (Propene sultone) may be further included.
- a lithium salt such as LiPF 6 , LiClO 4 , LiBF 4 , LiN (SO 2 CF 3 ) 2
- a lithium salt is a linear form of cyclic carbonate of EC or PC, which is a highly dielectric solvent, and DEC, DMC, or EMC, which is a low viscosity solvent.
- the lithium salt-containing non-aqueous electrolyte can be prepared by adding to a mixed solvent of carbonate.
- the present invention also provides a battery module including the secondary battery as a unit cell, and provides a battery pack including the battery module.
- the battery pack may be used as a power source for medium and large devices requiring high temperature stability, long cycle characteristics, high rate characteristics, and the like.
- Examples of the medium-to-large device include a power tool that is driven by an electric motor; Electric vehicles including electric vehicles (EVs), hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), and the like; Electric motorcycles including electric bicycles (E-bikes) and electric scooters (E-scooters); Electric golf carts; Power storage systems and the like, but is not limited thereto.
- Electric vehicles including electric vehicles (EVs), hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), and the like
- Electric motorcycles including electric bicycles (E-bikes) and electric scooters (E-scooters); Electric golf carts; Power storage systems and the like, but is not limited thereto.
- the aluminum current collector was heat treated at 50 mTorr in an oxygen atmosphere of 200 ° C. for 2 hours to form an aluminum oxide (Al 2 O 3 ) layer on the surface of the aluminum current collector. After that, 90 wt% of LiNi 0.5 Mn 1.5 O 4 (anode active material), 5 wt% of Super-P (conductor) and 5 wt% of PVdF (binder) were added to NMP to prepare the aluminum mixture prepared above. It was applied to the current collector to prepare a positive electrode for a secondary battery.
- LiNi 0.5 Mn 1.5 O 4 anode active material
- Super-P conductor
- PVdF binder
- Example 1 heat treatment for 2 hours at 50 mTorr in an oxygen atmosphere of 400 ° C to form an aluminum oxide (Al 2 O 3 ) layer on the surface of the aluminum current collector in the same manner as in Example 1
- Al 2 O 3 aluminum oxide
- Example 1 was heat treated at 100 mTorr in an oxygen atmosphere of 200 ° C for 2 hours to form an aluminum oxide (Al 2 O 3 ) layer on the surface of the aluminum current collector in the same manner as in Example 1 A positive electrode for a secondary battery was prepared.
- Example 1 heat treatment for 2 hours at 100 mTorr in an oxygen atmosphere of 400 ° C to form an aluminum oxide (Al 2 O 3 ) layer on the surface of the aluminum current collector in the same manner as in Example 1
- Al 2 O 3 aluminum oxide
- Example 1 heat treatment for 2 hours at 50 mTorr in an oxygen atmosphere of 100 ° C to form a layer of aluminum oxide (Al 2 O 3 ) on the surface of the aluminum current collector in the same manner as in Example 1
- a positive electrode for a secondary battery was prepared.
- a positive electrode for a secondary battery was manufactured in the same manner as in Example 1 except that the heat treatment was not performed on the aluminum current collector.
- the thickness and adhesive force of the aluminum oxide layer of the positive electrode prepared in Examples 1 to 6 were measured.
- the method for manufacturing a secondary battery electrode according to the present invention includes the surface area of the current collector including a process of treating the surface of the aluminum current collector to form an aluminum oxide (Al 2 O 3 ) layer having a predetermined thickness.
- Al 2 O 3 aluminum oxide
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Abstract
Description
Claims (22)
- 전극 활물질, 바인더 및 도전재를 포함하는 전극 합제가 알루미늄 집전체에 도포되어 있는 이차전지용 전극의 제조방법으로서, 상기 집전체에 40 nm 이하의 산화 알루미늄(Al2O3) 층이 형성되도록 집전체의 표면을 처리하는 과정을 포함하여, 전극 합제와 집전체의 접착력을 개선시키는 것을 특징으로 하는 이차전지용 전극의 제조 방법.
- 제 1 항에 있어서, 상기 집전체에 10 내지 40 nm의 산화 알루미늄(Al2O3) 층이 형성되도록 집전체의 표면을 처리하는 과정을 포함하는 것을 특징으로 하는 이차전지용 전극의 제조 방법.
- 제 2 항에 있어서, 상기 집전체에 20 내지 30 nm의 산화 알루미늄(Al2O3) 층이 형성되도록 집전체의 표면을 처리하는 과정을 포함하는 것을 특징으로 하는 이차전지용 전극의 제조 방법.
- 제 1 항에 있어서, 상기 표면처리 과정은 열 처리 또는 전기적 처리를 통하여 이루어지는 것을 특징으로 하는 이차전지용 전극의 제조 방법.
- 제 4 항에 있어서, 상기 열 처리는 100 내지 500 °C의 산소 분위기의 1 내지 150 mTorr에서 이루어지는 것을 특징으로 하는 이차전지용 전극의 제조 방법.
- 제 5 항에 있어서, 상기 열 처리는 200 내지 450 °C의 산소 분위기의 30 내지 100 mTorr에서 이루어지는 것을 특징으로 하는 이차전지용 전극의 제조 방법.
- 제 4 항에 있어서, 상기 전기적 처리는 30 내지 300 V의 인가 전압에서 1 mA/cm2 내지 200 mA/cm2의 전류 밀도 하에서 이루어지는 것을 특징으로 하는 이차전지용 전극의 제조 방법.
- 제 1 항에 있어서, 상기 전극은 양극 또는 음극, 또는 양극 및 음극인 것을 특징으로 하는 이차전지용 전극의 제조 방법.
- 제 8 항에 있어서, 상기 양극은 양극 활물질로 하기 화학식 1로 표현되는 스피넬 구조의 리튬 금속 산화물을 포함하는 것을 특징으로 하는 이차전지용 전극의 제조 방법:LixMyMn2-yO4-zAz (1)상기 식에서, 0.9≤x≤1.2, 0<y<2, 0≤z<0.2이고,M은 Al, Mg, Ni, Co, Fe, Cr, V, Ti, Cu, B, Ca, Zn, Zr, Nb, Mo, Sr, Sb, W, Ti 및 Bi로 이루어진 군에서 선택되는 하나 이상의 원소이며;A는 -1 또는 -2가의 하나 이상의 음이온이다.
- 제 9 항에 있어서, 상기 리튬 금속 산화물은 하기 화학식 2로 표시되는 것을 특징으로 하는 이차전지용 전극의 제조 방법:LixNiyMn2-yO4 (2)상기 식에서, 0.9≤x≤1.2, 0.4≤y≤0.5이다
- 제 10 항에 있어서, 상기 리튬 금속 산화물은 LiNi0.5Mn1.5O4 또는 LiNi0.4Mn1.6O4인 것을 특징으로 하는 이차전지용 전극의 제조 방법.
- 제 8 항에 있어서, 상기 음극은 음극 활물질로 하기 화학식 3으로 표시되는 리튬 금속 산화물을 포함하는 것을 특징으로 하는 이차전지용 전극의 제조 방법:LiaM'bO4-cAc (3)상기 식에서, M'은 Ti, Sn, Cu, Pb, Sb, Zn, Fe, In, Al 및 Zr로 이루어진 군에서 선택되는 하나 이상의 원소이고;a 및 b는 0.1≤a≤4; 0.2≤b≤4의 범위에서 M'의 산화수(oxidation number)에 따라 결정되며;c는 0≤c<0.2의 범위에서 산화수에 따라 결정되고;A는 -1 또는 -2가의 하나 이상의 음이온이다.
- 제 12 항에 있어서, 상기 리튬 금속 산화물은 하기 화학식 4로 표시되는 것을 특징으로 하는 이차전지용 전극의 제조 방법:LiaTibO4 (4)상기 식에서, 0.5≤a≤3, 1≤b≤2.5 이다.
- 제 13 항에 있어서, 상기 리튬 금속 산화물은 Li1.33Ti1.67O4 또는 LiTi2O4인 것을 특징으로 하는 이차전지용 전극의 제조 방법.
- 전극 활물질, 바인더 및 도전재를 포함하는 전극 합제가 알루미늄 집전체에 도포되어 있는 이차전지용 전극으로서, 상기 집전체에 40 nm 이하의 산화 알루미늄(Al2O3) 층이 형성되어 있는 것을 특징으로 하는 이차전지용 전극.
- 제 15 항에 있어서, 상기 전극 활물질은 양극 활물질 또는 음극 활물질 또는, 양극 활물질 및 음극 활물질이고, 상기 양극 활물질은 하기 화학식 1로 표현되는 스피넬 구조의 리튬 금속 산화물을 포함하고, 상기 음극 활물질은 하기 화학식 3으로 표시되는 산화물을 포함하는 것을 특징으로 하는 이차전지용 전극:LixMyMn2-yO4-zAz (1)LiaM'bO4-cAc (3)상기 식에서, 0.9≤x≤1.2, 0<y<2, 0≤z<0.2이고,M은 Al, Mg, Ni, Co, Fe, Cr, V, Ti, Cu, B, Ca, Zn, Zr, Nb, Mo, Sr, Sb, W, Ti 및 Bi로 이루어진 군에서 선택되는 하나 이상의 원소이며;A는 -1 또는 -2가의 하나 이상의 음이온이다.상기 식에서, M'은 Ti, Sn, Cu, Pb, Sb, Zn, Fe, In, Al 및 Zr로 이루어진 군에서 선택되는 하나 이상의 원소이고;a 및 b는 0.1≤a≤4; 0.2≤b≤4의 범위에서 M'의 산화수(oxidation number)에 따라 결정되며;c는 0≤c<0.2의 범위에서 산화수에 따라 결정되고;A는 -1 또는 -2가의 하나 이상의 음이온이다.
- 제 15 항에 따른 전극을 포함하는 것을 특징으로 하는 이차전지.
- 제 17 항에 있어서, 상기 이차전지는 리튬 이차전지인 것을 특징으로 하는 이차전지.
- 제 18 항에 따른 이차전지를 단위전지로 포함하는 것을 특징으로 하는 전지모듈.
- 제 19 항에 따른 전지모듈을 포함하는 것을 특징으로 하는 전지팩.
- 제 20 항에 따른 전지팩을 포함하는 것을 특징으로 하는 디바이스.
- 제 21 항에 있어서, 상기 디바이스는 전기자동차, 하이브리드 전기자동차, 플러그-인 하이브리드 전기자동차, 또는 전력저장용 시스템인 것을 특징으로 하는 디바이스.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2014560867A JP6058038B2 (ja) | 2012-04-17 | 2013-04-17 | 二次電池の製造方法及びそれを用いて製造される二次電池 |
| EP13778177.9A EP2811562B1 (en) | 2012-04-17 | 2013-04-17 | Method of manufacturing electrode for lithium secondary cell |
| CN201380014028.4A CN104321915A (zh) | 2012-04-17 | 2013-04-17 | 制造锂二次电池用电极的方法和使用其制造的电极 |
| US14/483,569 US9673444B2 (en) | 2012-04-17 | 2014-09-11 | Method of manufacturing electrode for lithium secondary battery and electrode manufactured using the same |
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| JP6493313B2 (ja) * | 2016-06-13 | 2019-04-03 | トヨタ自動車株式会社 | 全固体電池の製造方法 |
| CN107123812B (zh) * | 2017-04-14 | 2020-05-19 | 宁德时代新能源科技股份有限公司 | 一种正极集流体、其制备方法及其应用 |
| CN107154499B (zh) * | 2017-04-14 | 2020-05-15 | 宁德时代新能源科技股份有限公司 | 一种含有集流体的锂电池及其制备方法 |
| KR102140127B1 (ko) * | 2017-04-25 | 2020-07-31 | 주식회사 엘지화학 | 리튬 이차전지용 음극, 이의 제조방법 및 이것을 포함하는 리튬 이차전지 |
| KR102469471B1 (ko) * | 2017-12-14 | 2022-11-21 | 주식회사 엘지에너지솔루션 | 리튬 이차 전지용 양극 및 이를 포함하는 이차 전지 |
| JP6992614B2 (ja) * | 2018-03-12 | 2022-01-13 | トヨタ自動車株式会社 | 正極、リチウムイオン二次電池、および正極の製造方法 |
| US10886523B2 (en) * | 2018-05-24 | 2021-01-05 | Xerion Advanced Battery Corporation | Electroplating lithiated transition metal oxides using low purity starting precursors |
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| KR102803277B1 (ko) * | 2019-09-25 | 2025-05-07 | 주식회사 엘지에너지솔루션 | 폐전지로부터 양극 활물질을 회수하는 방법 |
| CN114930612B (zh) * | 2019-09-25 | 2025-08-29 | 株式会社Lg新能源 | 废旧电池处理方法 |
| KR102800995B1 (ko) * | 2019-09-27 | 2025-04-24 | 주식회사 엘지에너지솔루션 | 전고체 전지용 전극 및 이를 포함하는 전고체 전지 |
| CN111826691B (zh) * | 2020-08-21 | 2021-09-21 | 东北大学 | 一种溶剂化离子液体制备锌钽合金的方法 |
| CN118367151A (zh) * | 2023-01-17 | 2024-07-19 | 宁德时代新能源科技股份有限公司 | 集流体及其制备方法、二次电池、电池模块及用电装置 |
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| Publication number | Publication date |
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| JP6058038B2 (ja) | 2017-01-11 |
| US9673444B2 (en) | 2017-06-06 |
| KR20150035848A (ko) | 2015-04-07 |
| CN104321915A (zh) | 2015-01-28 |
| EP2811562A1 (en) | 2014-12-10 |
| JP2015513192A (ja) | 2015-04-30 |
| EP2811562A4 (en) | 2015-05-06 |
| KR20130117689A (ko) | 2013-10-28 |
| US20140377658A1 (en) | 2014-12-25 |
| EP2811562B1 (en) | 2016-10-26 |
| KR101542052B1 (ko) | 2015-08-05 |
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