# US 12,119,490 B2 · Positive electrode active material and secondary battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,119,490 B2 - Document ID: US12119490B2 - Status: Granted - Kind: B2 - Application number: 17/263,670 - Filed: 2019-02-21 - Published: 2021-09-23 - Granted: 2024-10-15 - Earliest claimed: 2018-07-31 - Assignees: Panasonic Intellectual Property Management Co., Ltd. - Applicants: Panasonic Intellectual Property Management Co., Ltd. - Inventors: Kosuke Kuroda; Hiroshi Kawada; Atsushi Fukui - Web page: https://patentgrep.com/patent/US12119490B2 ## CPC - 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 - C01G 53/42: containing alkali metals, e.g. LiNiO2 - C01G 53/82: Compounds containing nickel, with or without oxygen or hydrogen, and containing two or more other elements - H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx - H01M 4/364: {as mixtures} - H01M 4/366: {as layered products} - H01M 4/505: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy - H01M 4/582: {Halogenides} - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 50/103: prismatic or rectangular (H01M50/109, H01M50/11 take precedence) - C01P 2002/54: one element only - C01P 2002/60: Compounds characterised by their crystallite size - C01P 2002/76: by a space-group or by other symmetry indications - C01P 2002/85: by XPS, EDX or EDAX data - C01P 2004/80: Particles consisting of a mixture of two or more inorganic phases - C01P 2006/40: Electric properties - H01M 10/0431: {Cells with wound or folded electrodes (H01M10/045 takes precedence)} - H01M 2004/028: {Positive electrodes} - Y02E 60/10: Energy storage using batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - 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) - 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 Provided is a positive electrode active material including a first lithium oxide represented by Li2+xNi1−yA1yO2−zA2z, where −0.5≤x≤0.3, 0≤y≤0.1, and 0≤z≤0.3. Here, at least one of y and z is not 0. A1 includes at least one selected from the group consisting of Ga, Bi, Ba, Y, Sn, Ca, W, and Ta. A2 includes at least one selected from the group consisting of halogen elements and S. ## Claims ### Claim 1 A positive electrode active material for secondary batteries, the positive electrode active material comprising: a first lithium oxide represented by a composition formula (1): Li2+xNi1−yA1yO2−zA2z, where −0.5≤x≤0.3, 0≤y≤0.1, and 0≤z≤0.3, at least one of y and z being not 0, A1 including at least one selected from the group consisting of Ba, Ca, W, and Ta, A2 including at least one selected from the group consisting of halogen elements and S. ### Claim 2 (depends on 1) The positive electrode active material according to claim 1, wherein the A1 further includes Ga. ### Claim 3 (depends on 1) The positive electrode active material according to claim 1, wherein the A2 includes at least F. ### Claim 4 (depends on 3) The positive electrode active material according to claim 3, further comprising LiF. ### Claim 5 (depends on 4) The positive electrode active material according to claim 4, wherein the LiF is localized on a surface of the first lithium oxide. ### Claim 6 (depends on 1) The positive electrode active material according to claim 1, wherein the first lithium oxide is mixed with a second lithium oxide represented by a composition formula (2): LiaM1O2, where 0.95≤a≤1.2, M1 including at least one selected from the group consisting of Ni, Mn, and Co. ### Claim 7 (depends on 6) The positive electrode active material according to claim 6, wherein the second lithium oxide is represented by a composition formula (2a): LiaNibCocM21−b−cO2, where 0.95≤a≤1.2, 0.3≤b≤0.95, 00.5°. ### Claim 12 A positive electrode active material for secondary batteries, the positive electrode active material comprising: a first lithium oxide represented by a composition formula (1): Li2+xNi1−yA1yO2−zA2z, where −0.5≤x≤0.3, 0≤y≤0.1, and 0