# US 2019/0355969 A1 · Non-Aqueous Electrolyte Secondary Battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0355969 A1 - Document ID: US20190355969A1 - Status: Published application - Kind: A1 - Application number: 16/308,024 - Filed: 2016-06-08 - Published: 2019-11-21 - Earliest claimed: 2016-06-08 - Assignees: Nissan Motor Co., Ltd. - Applicants: Nissan Motor Co., Ltd. - Inventors: Yuji Muroya; Fumihiro Kawamura; Manabu Nishijima; Yoshiaki Nitta - Web page: https://patentgrep.com/patent/US20190355969A1 ## CPC - H01M 4/13: Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof - H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx - H01M 4/133: Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx - 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 10/05: Accumulators with non-aqueous electrolyte (H01M10/39 takes precedence) - 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 - H01M 10/0585: of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators - H01M 2004/021: {Physical characteristics, e.g. porosity, surface area} - H01M 2010/4292: {Aspects relating to capacity ratio of electrodes/electrolyte or anode/cathode} - H01M 2300/004: Three solvents - 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 Provided is a non-aqueous electrolyte secondary battery which has improved battery durability in the battery having a high capacity, a high density, and a large area. A non-aqueous electrolyte secondary battery including a power generating element including a positive electrode in which a positive electrode active material layer containing a positive electrode active material is formed on a surface of a positive electrode current collector, a negative electrode in which a negative electrode active material layer containing a negative electrode active material is formed on a surface of a negative electrode current collector, and a separator, a ratio of a rated capacity to a pore volume of the positive electrode active material layer being 1.40 Ah/cc or more, a ratio of a battery area to a rated capacity being 4.0 cm2/Ah or more, and a rated capacity being 30 Ah or more, wherein a variation in porosity in the positive electrode active material layer is 6.0% or less. ## Claims ### Claim 1 A non-aqueous electrolyte secondary battery comprising a power generating element including a positive electrode in which a positive electrode active material layer containing a positive electrode active material is formed on a surface of a positive electrode current collector, a negative electrode in which a negative electrode active material layer containing a negative electrode active material is formed on a surface of a negative electrode current collector, and a separator, a ratio of a rated capacity to a pore volume of the positive electrode active material layer being 1.40 Ah/cc or more, a ratio of a battery area to a rated capacity being 4.0 cm2/Ah or more, and a rated capacity being 30 Ah or more, wherein a variation in porosity in the positive electrode active material layer is 6.0% or less. ### Claim 2 (depends on 1) The non-aqueous electrolyte secondary battery according to claim 1, wherein the ratio of the rated capacity to the pore volume of the positive electrode active material layer is 2.20 Ah/cc or more, and the variation in porosity in the positive electrode active material layer is 5.0% or less. ### Claim 3 (depends on 1, 2) The non-aqueous electrolyte secondary battery according to claim 1 or 2, wherein the variation in porosity in the positive electrode active material layer is 4.0% or less. ### Claim 4 (depends on 1, 2, 3) The non-aqueous electrolyte secondary battery according to any one of claims 1 to 3, wherein the positive electrode active material is a lithium composite oxide having a composition represented by LiaNibMncCodMxO2 (provided that, in the formula, a, b, c, d, and x satisfy 0.9≤a≤1.2, 0