# US 12,113,197 B2 · Secondary battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,113,197 B2 - Document ID: US12113197B2 - Status: Granted - Kind: B2 - Application number: 17/289,974 - Filed: 2019-10-23 - Published: 2022-01-06 - Granted: 2024-10-08 - Earliest claimed: 2018-10-30 - Assignees: Panasonic Intellectual Property Management Co., Ltd. - Applicants: Panasonic Intellectual Property Management Co., Ltd. - Inventors: Tomohiro Harada - Web page: https://patentgrep.com/patent/US12113197B2 ## CPC - H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx - H01M 4/62: Selection of inactive substances as ingredients for active masses, e.g. binders, fillers - H01M 4/386: {Silicon or alloys based on silicon} - H01M 4/505: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy - 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 - H01M 4/5825: {Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines} - H01M 4/621: {Binders} - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 10/0587: of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators - H01M 10/4235: {Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence)} - H01M 50/46: Separators, membranes or diaphragms characterised by their combination with electrodes - H01M 50/469: tubular or cylindrical - H01M 2004/028: {Positive electrodes} - Y02E 60/10: Energy storage using batteries - Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract A secondary battery including a positive electrode including a positive electrode active material capable of electrochemically absorbing and releasing lithium ions, a negative electrode including a negative electrode active material capable of electrochemically absorbing and releasing lithium ions, a separator interposed between the positive and negative electrodes, and a non-aqueous electrolyte. The positive electrode includes a positive electrode material mixture containing the positive electrode active material and a positive electrode additive. The positive electrode additive includes a compound represented by LiaFexMyOz, where 0≤a≤5, 0≤x≤5, 0≤y≤1, and 0≤z≤4, with at least two of a, x, y and z being more than 0, and M includes at least one kind selected from the group consisting of Mn, Zn, Al, Ga, Ge, Ti, Si, Sn, Ce, Y, Zr, S, and Na. ## Claims ### Claim 1 A secondary battery, comprising: a positive electrode including a positive electrode active material capable of electrochemically absorbing and releasing lithium ions; a negative electrode including a negative electrode active material capable of electrochemically absorbing and releasing lithium ions; a separator interposed between the positive electrode and the negative electrode; and a non-aqueous electrolyte, wherein the positive electrode includes a positive electrode material mixture containing the positive electrode active material and a positive electrode additive, the positive electrode additive includes a compound represented by a general formula: LiaFexMyOz, where 0≤a≤5, 0≤x≤5, 0≤y≤1, and 0≤z≤4, with at least two of a, x, y and z being more than 0, and M includes at least one kind selected from the group consisting of Mn, Zn, Al, Ga, Ge, Ti, Si, Sn, Ce, Y, Zr, S, and Na, a deoxidizing agent is placed inside the secondary battery, and the deoxidizing agent includes at least one kind selected from the group consisting of a cerium oxide, a zeolite, and a Ca—Si alloy; and when cerium oxide is included, an atomic ratio: Ce/Fe of Ce contained in the cerium oxide in the battery to Fe contained in the positive electrode additive in the positive electrode material mixture is 0.1 or more and 80 or less. ### Claim 2 (depends on 1) The secondary battery according to claim 1, wherein a content of the positive electrode additive in the positive electrode material mixture is 0.1 mass % or more and 5 mass % or less with respect to a total mass of the positive electrode material mixture. ### Claim 3 (depends on 1) The secondary battery according to claim 1, wherein the positive electrode additive includes at least one kind selected from the group consisting of Li5FeO4, Li4Fe4, LiFeO2, Li2O, and FeO2. ### Claim 4 (depends on 1) The secondary battery according to claim 1, wherein the positive electrode active material includes a lithium-containing transition metal oxide having a layered rock-salt type crystal structure. ### Claim 5 (depends on 1) The secondary battery according to claim 1, wherein the negative electrode active material includes a silicon-containing material. ### Claim 6 (depends on 1) The secondary battery according to claim 1, wherein the cerium oxide is represented by a general formula: CeO2-x, where 0