# US 12,113,204 B2 · Method for producing positive electrode active material for lithium ion secondary battery, and molded body > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,113,204 B2 - Document ID: US12113204B2 - Status: Granted - Kind: B2 - Application number: 17/421,862 - Filed: 2019-12-23 - Published: 2022-04-07 - Granted: 2024-10-08 - Earliest claimed: 2019-01-10 - Assignees: Sumitomo Metal Mining Co., Ltd. - Applicants: Sumitomo Metal Mining Co., Ltd. - Inventors: Jun Suzuki - Web page: https://patentgrep.com/patent/US12113204B2 ## CPC - C01G 53/42: containing alkali metals, e.g. LiNiO2 - H01M 4/364: {as mixtures} - H01M 4/0433: {Molding} - H01M 4/0471: {involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis} - H01M 4/525: of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy - C01P 2002/52: containing elements as dopants - C01P 2002/54: one element only - C01P 2006/40: Electric properties - H01M 2004/021: {Physical characteristics, e.g. porosity, surface area} - H01M 2004/028: {Positive electrodes} - Y02E 60/10: Energy storage using batteries - C01G: COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts or peroxyacids C01B15/00; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium, or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds containing nitrogen, other non-metals and metal C01B21/082}; metal amides C01B21/092; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanamide C01C3/16; thiocyanates C01C3/20) - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A method for producing a positive electrode active material for a lithium ion secondary battery containing lithium-nickel composite oxide, includes: mixing a nickel compound, a lithium compound, and organic compound particles to obtain a lithium mixture; molding the lithium mixture to obtain a molded body; firing the molded body to obtain a fired body; and crushing the fired body to obtain lithium-nickel composite oxide powder. ## Claims ### Claim 1 A molded body being used in producing of a positive electrode active material for a lithium ion secondary battery, the molded body comprising a nickel compound, a lithium compound, and organic compound particles, wherein the nickel compound is composed of a nickel composite oxide, and a density of the molded body is 1.3 g/cm3 or more. ### Claim 2 (depends on 1) The molded body according to claim 1, wherein the organic compound particles are solid at a temperature of the molded body in molding. ### Claim 3 (depends on 1) The molded body according to claim 1, wherein the organic compound particles evaporate at a temperature lower than a melting temperature of the lithium compound. ### Claim 4 (depends on 1) The molded body according to claim 1, wherein the organic compound particles are thermally decomposed into a gas at a temperature lower than a melting temperature of the lithium compound. ### Claim 5 (depends on 1) The molded body according to claim 1, wherein a size of the organic compound particles is 0.1 mm or more and 10 mm or less. ### Claim 6 (depends on 1) The molded body according to claim 1, wherein a content of the organic compound particles is 3 mass % or more and 12 mass % or less with respect to the molded body. ### Claim 7 (depends on 1) The molded body according to claim 1, wherein the lithium compound is composed of lithium hydroxide, lithium nitrate, lithium carbonate, lithium acetate, or a mixture thereof. ### Claim 8 (depends on 1) The molded body according to claim 1, wherein the nickel compound contains nickel (Ni) and optionally cobalt (Co) and an element (M1), and a molar ratio of respective metal elements is represented as Ni:Co:M1=(1−x−y):x:y (provided that, 0≤x≤0.50, 0≤y≤0.40, and 0.10≤(1−x−y)≤1.0, and MI is at least one element selected from the group consisting of an element other than Ni and Co, an alkali metal, an alkali earth metal, a transition metal, a base metal, and a semimetal). ### Claim 9 A method for producing a positive electrode active material for a lithium ion secondary battery containing lithium-nickel composite oxide, the method comprising: mixing a nickel compound, a lithium compound, and organic compound particles to obtain a lithium mixture; molding the lithium mixture to obtain a molded body; firing the molded body to obtain a fired body; and crushing the fired body to obtain lithium-nickel composite oxide powder, wherein the nickel compound is composed of a nickel composite oxide, and a density of the molded body is 1.3 g/cm3 or more. ### Claim 10 (depends on 9) The method for producing a positive electrode active material for a lithium ion secondary battery according to claim 9, wherein the organic compound particles are solid at a temperature of the molded body in molding. ### Claim 11 (depends on 9) The method for producing a positive electrode active material for a lithium ion secondary battery according to claim 9, wherein the organic compound particles evaporate at a temperature lower than a melting temperature of the lithium compound. ### Claim 12 (depends on 9) The method for producing a positive electrode active material for a lithium ion secondary battery according to claim 9, wherein the organic compound particles are thermally decomposed into a gas at a temperature lower than a melting temperature of the lithium compound. ### Claim 13 (depends on 9) The method for producing a positive electrode active material for a lithium ion secondary battery according to claim 9, wherein an average particle size of the organic compound particles is 0.1 mm or more and 10 mm or less. ### Claim 14 (depends on 9) The method for producing a positive electrode active material for a lithium ion secondary battery according to claim 9, wherein a mixing amount of the organic compound particles is 3 mass % or more and 12 mass % or less with respect to the lithium mixture. ### Claim 15 (depends on 9) The method for producing a positive electrode active material for a lithium ion secondary battery according to claim 9, wherein the lithium compound is composed of lithium hydroxide, lithium nitrate, lithium carbonate, lithium acetate, or a mixture thereof. ### Claim 16 (depends on 9) The method for producing a positive electrode active material for a lithium ion secondary battery according to claim 9, wherein the lithium-nickel composite oxide contain lithium (Li) and nickel (Ni), and optionally cobalt (Co) and an element (M1), and a molar ratio of respective metal elements is represented as Li:Ni:Co:M1=s: (1−x−y): x: y (provided that, 0.93