WO2022114718A1 - 배향성 구조를 갖는 리튬전지용 양극활물질 및 이의 제조방법 - Google Patents
배향성 구조를 갖는 리튬전지용 양극활물질 및 이의 제조방법 Download PDFInfo
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- WO2022114718A1 WO2022114718A1 PCT/KR2021/017235 KR2021017235W WO2022114718A1 WO 2022114718 A1 WO2022114718 A1 WO 2022114718A1 KR 2021017235 W KR2021017235 W KR 2021017235W WO 2022114718 A1 WO2022114718 A1 WO 2022114718A1
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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
- 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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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/80—Compounds containing nickel, with or without oxygen or hydrogen, and containing one or more other elements
- C01G53/82—Compounds containing nickel, with or without oxygen or hydrogen, and containing two or more other elements
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- 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
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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
- 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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- 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
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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
- 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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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/50—Solid solutions
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/50—Agglomerated particles
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- 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
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- 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
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- 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
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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
- H01M2004/021—Physical characteristics, e.g. porosity, surface area
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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
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/028—Positive electrodes
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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
Definitions
- the present invention relates to a cathode active material for a lithium battery, characterized in that orientation is formed by sintering a density gradient precursor whose density is gradually changed from the inside to the outside of the secondary particle formed as an aggregate of primary particles, and to a method for manufacturing the same.
- the positive electrode active material for a lithium battery according to the present invention may have long life and high capacity characteristics by having an oriented structure.
- lithium secondary battery having a high energy density and voltage, a long cycle life, and a low self-discharge rate has been commercialized and widely used.
- a cathode active material for lithium secondary batteries lithium nickel cobalt manganese composite oxide is used.
- cobalt provides a cathode active material with high operating voltage and excellent rate characteristics.
- the cathode active material having a high cobalt composition is expensive, there is a limit to its mass use as a power source in fields such as electric vehicles.
- the content of cobalt is gradually being reduced, and therefore, a solution that can supplement the rate characteristics and lifespan is required.
- the positive electrode active material having a concentration gradient in which the concentration of transition metal components is gradually changed from the surface to the inside of the positive electrode active material has been proposed.
- the positive electrode active material having a concentration gradient developed so far has a problem in that it does not have perfect orientation from the inside of the particle to the surface, and also a complicated process is used to implement this, so processing cost is expensive and quality control is difficult.
- the present inventors As a result of the present inventors' earnest efforts to produce a cathode active material having a low processing cost and perfect orientation in order to solve the problems of the prior art, the present inventors only have perfect orientation by adding xylitol as a particle shape control agent during the production of the cathode active material. After confirming that it is possible to manufacture a positive electrode active material with improved capacity characteristics and lifespan characteristics, the present invention was completed.
- An object of the present invention is to provide a positive electrode active material in which secondary particles are formed as agglomerates of primary particles, and having improved capacity characteristics and lifespan characteristics having orientation from the inside of the secondary particles to the outside of the secondary particles.
- the positive electrode active material according to the present invention is characterized in that orientation is formed by firing a density gradient precursor whose density is gradually changed from the inside of the secondary particle formed as an aggregate of the primary particle to the outside of the particle.
- Another object of the present invention is to provide a method for manufacturing a positive electrode active material having improved capacity characteristics and lifespan characteristics manufactured by the above method.
- Another object of the present invention is to provide a lithium secondary battery including a positive electrode active material having improved capacity characteristics and lifespan characteristics.
- the term “orientation” refers to providing a density gradient precursor in which the density continuously changes throughout the inner region of secondary particles formed as aggregates of primary particles, so that the density gradient is diffused during the firing process and secondary It means a gradual change from the inside of the particle to the outside of the secondary particle.
- primary particle refers to a primary structure of a single particle
- secondary particle refers to an aggregate in which a plurality of primary particles are aggregated by physical or chemical bonding between the primary particles. do.
- the positive electrode active material for a lithium secondary battery according to the present invention forms an orientation by firing a density gradient precursor whose density is gradually changed from the inside of the secondary particle formed as an aggregate of primary particles to the outside of the particle, thereby reducing the movement resistance of lithium ions.
- a density gradient precursor whose density is gradually changed from the inside of the secondary particle formed as an aggregate of primary particles to the outside of the particle, thereby reducing the movement resistance of lithium ions.
- FIG. 1 is an SEM image of a density gradient precursor prepared by the manufacturing method according to Example 1.
- FIG. 2 is an SEM image of a cross-section of an active material for a lithium secondary battery manufactured by the manufacturing method according to Example 1.
- FIG. 2 is an SEM image of a cross-section of an active material for a lithium secondary battery manufactured by the manufacturing method according to Example 1.
- FIG. 4 is an SEM image of a cross-section of an active material for a lithium secondary battery manufactured by the manufacturing method according to Example 2. Referring to FIG.
- FIG. 5 is an SEM image of a density gradient precursor prepared by the manufacturing method according to Comparative Example 1.
- FIG. 6 is an SEM image of a cross-section of an active material for a lithium secondary battery manufactured by the manufacturing method according to Comparative Example 1. Referring to FIG.
- An object of the present invention is to provide a positive electrode active material in which secondary particles are formed as agglomerates of primary particles, and the capacity characteristics and lifespan characteristics are improved having orientation from the inside of the secondary particles to the outside of the secondary particles.
- the positive electrode active material has a density gradient type precursor whose density is gradually changed from the inside to the outside of the secondary particles formed as agglomerates of the primary particles to have an orientation. It is characterized in that it is formed.
- the positive electrode active material according to the present invention provides a density gradient-type precursor in which the density is continuously changed throughout the inner region of the secondary particles, so that the density gradient is diffused during the firing process and internal alignment of the positive electrode active material can be formed.
- the positive electrode active material having an orientation structure according to the present invention can improve the output characteristics and lifespan characteristics of the secondary battery by reducing the movement resistance of lithium in the lithium secondary battery.
- the primary particles are grown in an orientation form from the center of the secondary particles toward the surface to form spherical secondary particles.
- the primary particles may have a plate-like, needle-like or amorphous particle shape, but is not limited thereto.
- the secondary particles have a specific surface area of 1 to 30 m 2 /g and an average particle diameter (D 50 ) of 2 to 20 ⁇ m.
- the positive electrode active material is characterized in that it is composed of a composite oxide of lithium and a transition metal.
- the transition metal may be nickel, cobalt, manganese, or a mixture thereof.
- the positive electrode active material is a lithium-nickel composite oxide represented by the following Chemical Formula 1:
- M is at least one selected from Ba, Ca, Zr, Ti, Mg, Ta, Nb, and Mo, and 0.9 ⁇ x ⁇ 1.2, 0.8 ⁇ y ⁇ 1, 0 ⁇ z ⁇ 0.8, 0 ⁇ w ⁇ 0.05, 0 ⁇ v ⁇ 0.2.
- An object of the present invention is to provide a method for manufacturing a positive electrode active material having improved capacity characteristics and lifespan characteristics, the method comprising:
- step (A), step (B) or step (C) further comprises the step of adding a particle shape control agent
- the positive electrode active material is characterized in that the orientation is formed by firing a density gradient precursor whose density is gradually changed from the inside of the secondary particle formed as an aggregate of the primary particle to the outside of the particle.
- the particle shape control agent is characterized in that the sugar or sugar alcohol.
- the sugar or sugar alcohol is xylitol, mannitol, isomalt, sorbitol, maltitol, refined sucrose, lactose, inositol, erythritol, fructose, trehalose, ribitol, arabitol, galactitol, lactitol, maltotritol. or a combination thereof.
- the nickel-containing material is characterized in that it includes nickel-containing acetate, nitrate, sulfate, halide, sulfide, hydroxide, oxide or oxyhydroxide.
- the nickel-containing material is Ni(OH) 2 , NiO, NiOOH, NiCO 3 ⁇ 2Ni(OH) 2 ⁇ 4H 2 O, NiC 2 O2 2 ⁇ 2H 2 O, Ni(NO 3 ) 2 ⁇ 6H 2 O, NiSO 4 , NiSO 4 ⁇ 6H 2 O, fatty acid nickel salt, nickel halide or a combination thereof, or a combination thereof, but is not limited thereto.
- the cobalt-containing material is characterized in that the cobalt-containing acetate, nitrate, sulfate, halide, sulfide, hydroxide, oxide or oxyhydroxide.
- the cobalt-containing material is Co(OH) 2 , CoOOH, Co(OCOCH 3 ) 2 ⁇ 4H 2 O, Co(NO 3 ) 2 ⁇ 6H 2 O, CoSO 4 , Co(SO 4 ) 2 ⁇ 7H 2 O or a combination thereof may be, but is not limited thereto.
- the manganese-containing material is characterized in that the manganese-containing acetate, nitrate, sulfate, halide, sulfide, hydroxide, oxide or oxyhydroxide.
- the manganese-containing material is Mn 2 O 3 , MnO 2 , Mn 3 O 4 , MnCO 3 , Mn(NO 3 ) 2 , MnSO 4 , manganese acetate, manganese dicarboxylic acid salt, manganese citrate, fatty acid network It may be hepatitis, manganese oxyhydroxide, manganese chloride, or a combination thereof, but is not limited thereto.
- the pH adjusting agent may be NaOH, NHOH, KOH, or a combination thereof, but is not limited thereto.
- the reaction solution in step (C) is characterized in that the pH is 10 to 12.
- the method includes drying the metal composite hydroxide in an oven at 100 to 200° C., preferably at 150° C. for 24 hours or more after step (D) so that the moisture content is 0.1 wt% or less It is characterized in that it further comprises the step of adjusting to become.
- the lithium raw material is a lithium-containing carbonate (eg, lithium carbonate), a hydrate (eg, lithium hydroxide hydrate (LiOH ⁇ H 2 O)), a hydroxide (eg, For example, lithium hydroxide), a nitrate (eg, lithium nitrate (LiNO 3 )), a chloride (eg, lithium chloride (LiCl)), or a combination thereof, but is not limited thereto.
- a lithium-containing carbonate eg, lithium carbonate
- a hydrate eg, lithium hydroxide hydrate (LiOH ⁇ H 2 O)
- a hydroxide eg, For example, lithium hydroxide
- a nitrate eg, lithium nitrate (LiNO 3 )
- a chloride eg, lithium chloride (LiCl)
- the step of sintering in (F) is characterized in that it is performed at a temperature of 600 ⁇ 1000 °C for 5 ⁇ 30 hours.
- M raw material is further mixed.
- the present invention is to provide a positive electrode for a lithium secondary battery comprising a positive electrode active material with improved capacity characteristics and lifespan characteristics,
- the positive electrode active material is characterized in that the orientation is formed by firing a density gradient precursor whose density is gradually changed from the inside of the secondary particle formed as an aggregate of the primary particle to the outside of the particle.
- the positive electrode is characterized in that it further comprises a conductive material or a binder.
- the positive electrode is prepared by dissolving or dispersing a positive electrode active material, a conductive material and/or a binder in a solvent, and applying the positive electrode mixture to at least one surface of a positive electrode current collector, followed by drying and rolling. or by casting the positive electrode mixture on a separate support and then laminating a film obtained by peeling from the support on the positive electrode current collector.
- the positive electrode current collector is not particularly limited as long as it has conductivity without causing chemical change in the battery, and for example, stainless steel, aluminum, nickel, titanium, fired carbon, or carbon, nickel on the surface of aluminum or stainless steel. , titanium, silver, or the like surface-treated may be used.
- the positive electrode current collector may typically have a thickness of 3 ⁇ m to 500 ⁇ m, and may increase the adhesion of the positive electrode active material by forming fine irregularities on the surface of the current collector.
- it may be used in various forms, such as a film, a sheet, a foil, a net, a porous body, a foam, a non-woven body.
- the conductive material is used to impart conductivity to the electrode, and in the configured battery, it can be used without any particular limitation as long as it does not cause chemical change and has electronic conductivity.
- Specific examples include graphite such as natural graphite and artificial graphite; carbon-based materials such as carbon black, acetylene black, ketjen black, channel black, furnace black, lamp black, thermal black, and carbon fiber; metal powders or metal fibers, such as copper, nickel, aluminum, and silver; conductive whiskers such as zinc oxide and potassium titanate; conductive metal oxides such as titanium oxide; or conductive polymers such as polyphenylene derivatives, and the like, and one or a mixture of two or more thereof may be used.
- the conductive material may be included in an amount of 1% to 30% by weight based on the total weight of the positive electrode active material layer.
- the binder serves to improve adhesion between the positive active material particles and the adhesion between the positive active material and the current collector.
- Specific examples include polyvinylidene fluoride (PVDF), vinylidene fluoride-hexafluoropropylene copolymer (PVDF-co-HFP), polyvinyl alcohol, polyacrylonitrile, carboxymethyl cellulose (CMC) ), starch, hydroxypropylcellulose, regenerated cellulose, polyvinylpyrrolidone, tetrafluoroethylene, polyethylene, polypropylene, ethylene-propylene-diene polymer (EPDM), sulfonated-EPDM, styrene butadiene rubber (SBR), fluororubber, or various copolymers thereof, and any one of them or a mixture of two or more thereof may be used.
- the binder may be included in an amount of 1% to 30% by weight based on the total weight of the positive electrode active material layer.
- the solvent used for preparing the positive electrode material may be a solvent generally used in the art, for example, dimethyl sulfoxide (DMSO), isopropyl alcohol, N-methylpyrrolidone ( NMP), acetone or water may be used alone or as a mixture thereof.
- DMSO dimethyl sulfoxide
- NMP N-methylpyrrolidone
- acetone or water may be used alone or as a mixture thereof.
- the amount of the solvent used may be appropriately adjusted in consideration of the application thickness of the slurry, the production yield, the viscosity, and the like.
- the present invention provides a lithium secondary battery comprising a positive electrode including a positive electrode active material having improved capacity characteristics and lifespan characteristics, a negative electrode including a negative electrode active material, a separator interposed between the positive electrode and the negative electrode, and an electrolyte supported between the positive electrode and the negative electrode what we want to provide,
- the positive electrode active material is characterized in that the orientation is formed by firing a density gradient precursor whose density is gradually changed from the inside of the secondary particle formed as an aggregate of the primary particle to the outside of the particle.
- the negative electrode is prepared by coating the negative electrode active material directly on the copper current collector, or casting the negative electrode active material on a separate support, and laminating the negative electrode active material film peeled from the support on the copper current collector, like the positive electrode.
- the anode active material a material capable of intercalating/deintercalating lithium may be used.
- it may include lithium metal or lithium alloy, coke, artificial graphite, natural graphite, organic high molecular compound combustor, carbon fiber, and the like.
- the conductive material and the binder may be used in the same manner as in the case of the above-described positive electrode.
- any of the separators can be used as long as they are commonly used in lithium secondary batteries, and for example, polyethylene, polypropylene, polyvinylidene fluoride, or a multilayer film of two or more layers thereof may be used. and a mixed multilayer film such as a polyethylene/polypropylene two-layer separator, a polyethylene/polypropylene/polyethylene three-layer separator, and a polypropylene/polyethylene/polypropylene three-layer separator may be used.
- the electrolyte a non-aqueous electrolyte or a known solid electrolyte may be used, and lithium salt dissolved therein is used.
- the solvent of the said non-aqueous electrolyte is not specifically limited, Cyclic carbonates, such as ethylene carbonate, propylene carbonate, butylene carbonate, vinylene carbonate; chain carbonates such as dimethyl carbonate, methyl ethyl carbonate, and diethyl carbonate; esters such as methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, and ⁇ -butyrolactone; ethers such as 1,2-dimethoxyethane, 1,2-diethoxyethane, tetrahydrofuran, 1,2-dioxane, and 2-methyltetrahydrofuran; nitriles such as acetonitrile; Amides, such as dimethylformamide, etc. can be used. These can be used individually or in combination of two or more. In particular, a mixed solvent of a cyclic carbonate and a chain carbonate can be preferably used.
- Example 1 Preparation of a cathode active material for a lithium battery having an oriented structure (1)
- the flow rate of the metal sulfate aqueous solution was 3 L/hour, the ammonia water flow rate was adjusted to a ratio of 0.04 to the metal aqueous solution flow rate, and the dose of sodium hydroxide (NaOH) solution was adjusted so that the hydrogen ion concentration (pH) in the reactor was about 10.5 to 11.5.
- the stirring speed was 400 rpm, and the reactants were added so that the average residence time of the entire solution was 20 hours, the reaction temperature was maintained at 30°C to 50°C, and nitrogen gas was added to maintain an inert atmosphere.
- the solution received was washed with water and solid-liquid separation using a filter press, and residual moisture was removed using high-pressure fresh air.
- the solid-liquid separated active material was dried at 100 to 200°C using a fluidized bed dryer.
- Lithium composite having a uniform orientation structure A metal oxide was prepared.
- the flow rate of the metal sulfate aqueous solution was 3 L/hour, the ammonia water flow rate was adjusted to a ratio of 0.04 to the metal aqueous solution flow rate, and the dose of sodium hydroxide (NaOH) solution was adjusted so that the hydrogen ion concentration (pH) in the reactor was about 10.5 to 11.5.
- xylitol was added to the reactor in an amount of 0.1 parts by weight based on 100 parts by weight of the transition metal.
- the stirring speed was 400 rpm, and the reactants were added so that the average residence time of the entire solution was 20 hours, the reaction temperature was maintained at 30°C to 50°C, and nitrogen gas was added to maintain an inert atmosphere.
- the solution received was washed with water and solid-liquid separation using a filter press, and residual moisture was removed using high-pressure fresh air.
- the solid-liquid separated active material was dried at 100 to 200°C using a fluidized bed dryer.
- Lithium hydroxide is mixed with the hydroxide particles obtained above so that the equivalent ratio of the hydroxide to the hydroxide is 1.05, heated at a temperature increase rate of 2.5°C/min in an oxygen atmosphere, and then calcined at 780°C for 9 hours.
- a metal oxide was prepared.
- a 2.5 M aqueous solution of metal sulfate, 25% sodium hydroxide, and 28% aqueous ammonia were prepared in which nickel sulfate, cobalt sulfate, and manganese sulfate were mixed in a molar ratio of 0.8: 0.1: 0.1.
- the flow rate of the metal sulfate aqueous solution was 3 L/hour, the ammonia water flow rate was adjusted to a ratio of 0.04 to the metal aqueous solution flow rate, and the dose of sodium hydroxide (NaOH) solution was adjusted so that the hydrogen ion concentration (pH) in the reactor was about 10.5 to 11.5.
- the stirring speed was 400 rpm, and the reactants were added so that the average residence time of the entire solution was 20 hours, the reaction temperature was maintained at 30°C to 50°C, and nitrogen gas was added to maintain an inert atmosphere.
- the solution received was washed with water and solid-liquid separation using a filter press, and residual moisture was removed using high-pressure fresh air.
- the solid-liquid separated active material was dried at 100 to 200°C using a fluidized bed dryer.
- Lithium hydroxide is mixed with the hydroxide particles obtained above so that the equivalent ratio of the hydroxide to the hydroxide is 1.05, heated at a temperature increase rate of 2.5°C/min in an oxygen atmosphere, and then calcined at 780°C for 9 hours.
- a metal oxide was prepared.
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Abstract
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Claims (9)
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202180079455.5A CN116490996A (zh) | 2020-11-25 | 2021-11-23 | 具有定向性结构的锂电池用正极活性物质及其制备方法 |
| US18/254,519 US20240030431A1 (en) | 2020-11-25 | 2021-11-23 | Lithium Battery Cathode Active Material Having Oriented Structure, and Preparation Method Therefor |
| JP2023532683A JP7690584B2 (ja) | 2020-11-25 | 2021-11-23 | 配向構造を有するリチウム電池用正極活物質及びその製造方法 |
| CA3199811A CA3199811A1 (en) | 2020-11-25 | 2021-11-23 | Lithium battery cathode active material having oriented structure, and preparation method therefor |
| EP21898544.8A EP4254558A4 (en) | 2020-11-25 | 2021-11-23 | LITHIUM BATTERY CATHODE ACTIVE MATERIAL HAVING ORIENTED STRUCTURE AND PREPARATION METHOD THEREFOR |
| JP2025064910A JP2025096504A (ja) | 2020-11-25 | 2025-04-10 | 配向構造を有するリチウム電池用正極活物質及びその製造方法 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020200159510A KR102624905B1 (ko) | 2020-11-25 | 2020-11-25 | 배향성 구조를 갖는 리튬전지용 양극활물질 및 이의 제조방법 |
| KR10-2020-0159510 | 2020-11-25 |
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| JP (2) | JP7690584B2 (ko) |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2025013762A1 (ja) * | 2023-07-11 | 2025-01-16 | 株式会社田中化学研究所 | 金属複合水酸化物粉末、リチウム二次電池用正極活物質の製造方法及び金属複合水酸化物粉末の製造方法 |
| WO2025013752A1 (ja) * | 2023-07-11 | 2025-01-16 | 株式会社田中化学研究所 | 金属複合化合物粉末、金属複合化合物粉末の製造方法、及びリチウム二次電池用正極活物質の製造方法 |
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| KR20230171701A (ko) | 2022-06-14 | 2023-12-21 | 주식회사 엘지에너지솔루션 | 가스 벤팅 장치, 이를 포함하는 배터리 모듈 및 배터리 팩 |
| KR20240023848A (ko) * | 2022-08-16 | 2024-02-23 | (주)포스코퓨처엠 | 리튬 이차 전지용 양극 활물질용 전구체, 이를 포함하는 양극 활물질, 및 양극 활물질의 제조 방법 |
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| WO2025013762A1 (ja) * | 2023-07-11 | 2025-01-16 | 株式会社田中化学研究所 | 金属複合水酸化物粉末、リチウム二次電池用正極活物質の製造方法及び金属複合水酸化物粉末の製造方法 |
| WO2025013752A1 (ja) * | 2023-07-11 | 2025-01-16 | 株式会社田中化学研究所 | 金属複合化合物粉末、金属複合化合物粉末の製造方法、及びリチウム二次電池用正極活物質の製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20240030431A1 (en) | 2024-01-25 |
| CN116490996A (zh) | 2023-07-25 |
| EP4254558A4 (en) | 2024-11-20 |
| CA3199811A1 (en) | 2022-06-02 |
| EP4254558A1 (en) | 2023-10-04 |
| KR20240007315A (ko) | 2024-01-16 |
| KR102859450B1 (ko) | 2025-09-12 |
| JP2025096504A (ja) | 2025-06-26 |
| JP7690584B2 (ja) | 2025-06-10 |
| KR20220072178A (ko) | 2022-06-02 |
| KR102624905B1 (ko) | 2024-01-12 |
| JP2023551307A (ja) | 2023-12-07 |
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