# US 10,374,224 B2 · Method of manufacturing non-aqueous electrolyte solution secondary battery and non-aqueous electrolyte solution secondary battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,374,224 B2 - Document ID: US10374224B2 - Status: Granted - Kind: B2 - Application number: 15/676,416 - Filed: 2017-08-14 - Published: 2018-03-15 - Granted: 2019-08-06 - Earliest claimed: 2016-09-13 - Assignees: Toyota Jidosha Kabushiki Kaisha - Applicants: Toyota Jidosha Kabushiki Kaisha - Inventors: Koji Torita; Tatsuya Hashimoto; Keiichi Takahashi; Akihiro Taniguchi; Shuji Tsutsumi; Yusuke Fukumoto; Yuji Yokoyama - Web page: https://patentgrep.com/patent/US10374224B2 ## CPC - H01M 4/364: {as mixtures} - C01G 53/502: containing lithium and cobalt - H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx - H01M 4/1391: of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx - 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 10/052: Li-accumulators - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - C01G 45/1228: of the type (MnO2)-, e.g. LiMnO2 or Li(MxMn1-x)O2 - C01G 51/50: of the type (MnO2)n-, e.g. Li(CoxMn1-x)O2 or Li(MyCoxMn1-x-y)O2 - H01M 2004/021: {Physical characteristics, e.g. porosity, surface area} - 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 - Y02T 10/70: Energy storage systems for electromobility, e.g. 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) - 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 - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A method of manufacturing a non-aqueous electrolyte solution secondary battery includes: (A) preparing a first composite material by mixing a first positive electrode active material, a first conductive material and a first binder; (B) preparing a second composite material by mixing a second positive electrode active material, a second conductive material and a second binder; and (C) manufacturing a positive electrode by forming a positive electrode composite layer including the first composite material and the second composite material. The first positive electrode active material has an average discharge potential lower than that of the second positive electrode active material. The first conductive material has a first OAN. The second conductive material has a second OAN. A ratio of the second OAN to the first OAN is 1.3 or more and 2.1 or less. A sum of the first OAN and the second OAN is 31.64 ml/100 g or less. ## Claims ### Claim 1 A method of manufacturing a non-aqueous electrolyte solution secondary battery, the method comprising: preparing a first composite material by mixing a first positive electrode active material, a first conductive material and a first binder; preparing a second composite material by mixing a second positive electrode active material, a second conductive material and a second binder; manufacturing a positive electrode by forming a positive electrode composite layer including the first composite material and the second composite material; and manufacturing the non-aqueous electrolyte solution secondary battery including the positive electrode, a negative electrode, and a non-aqueous electrolyte solution, the positive electrode composite layer being formed such that the first positive electrode active material has an average discharge potential lower than an average discharge potential of the second positive electrode active material, the first positive electrode active material has a mass ratio of 10 mass % or more and 50 mass % or less with respect to a total of the first positive electrode active material and the second positive electrode active material, the first conductive material has a first oil absorption number with respect to 100 parts by mass of the first positive electrode active material, the second conductive material has a second oil absorption number with respect to 100 parts by mass of the second positive electrode active material, a ratio of the second oil absorption number to the first oil absorption number is 1.3 or more and 2.1 or less, and a sum of the first oil absorption number and the second oil absorption number is 31.64 ml/100 g or less, wherein the first positive electrode active material has a first composition represented by LiNia1Cob1Mnc1O2 (formula (I)) where 0.3