# US 10,374,225 B2 · 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 10,374,225 B2 - Document ID: US10374225B2 - Status: Granted - Kind: B2 - Application number: 16/096,377 - Filed: 2016-04-28 - Published: 2019-05-09 - Granted: 2019-08-06 - Earliest claimed: 2016-04-28 - Assignees: Nissan Motor Co., Ltd. - Applicants: Nissan Motor Co., Ltd. - Inventors: Kensuke Yamamoto; Wataru Ogihara; Gentaro Kano; Hideaki Tanaka; Youichirou Kondou; Masaaki Suzuki; Tsuyoshi Tanabe; Takashi Nakano - Web page: https://patentgrep.com/patent/US10374225B2 ## CPC - H01M 4/364: {as mixtures} - H01M 4/133: Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx - H01M 4/134: Electrodes based on metals, Si or alloys - 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 4/587: for inserting or intercalating light metals - H01M 4/622: {being polymers} - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 50/119: Metals - H01M 50/121: Organic material - H01M 50/124: having a layered structure - H01M 50/129: with two or more layers of only organic material - H01M 50/133: Thickness - H01M 50/449: having a layered structure - H01M 50/491: Porosity - H01M 2004/021: {Physical characteristics, e.g. porosity, surface area} - Y02E 60/10: Energy storage using batteries - 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 - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A non-aqueous electrolyte secondary battery includes: a negative electrode active material represented by the Formula (1)=α (Si material)+β (carbon material), wherein the Si material is one or more kinds selected from the group consisting of SiOx that is a mixture of amorphous SiO2 particles and Si particles and a Si-containing alloy; α and β represent % by mass of each component in the layer; and 80≤α+β≤98, 0.1≤α≤40, and 58≤β≤97.9 are satisfied, and a difference between the maximum value and the minimum value of an area proportion (%) of a binder in an area of the field of view of each image of cross-sections of the layer in a case where a plurality of arbitrary places is selected in a plane of the negative electrode active material layer is within 10%. ## Claims ### Claim 1 A non-aqueous electrolyte secondary battery which has a ratio value of a battery volume, defined as a product of a projected area and a thickness of the battery including a battery outer casing body, to a rated capacity of 10 cm3/Ah or less and a rated capacity of 3 Ah or more, the battery comprising: a power generating element including a positive electrode comprising a positive electrode active material layer containing a positive electrode active material formed on a surface of a positive electrode current collector, a negative electrode comprising a negative electrode active material layer containing a negative electrode active material formed on a surface of a negative electrode current collector, and a separator, wherein the negative electrode active material layer comprises a negative electrode active material represented by the following Formula (1) α(Si material)+β(carbon material) (1) wherein the Si material is a Si-containing alloy; the carbon material is one or two or more kinds selected from the group consisting of graphite, non-graphitizable carbon, and amorphous carbon, α and β represent % by mass of each component in the negative electrode active material layer; and 80≤α+β≤98, 0.1≤α≤40, and 58≤β≤97.9 are satisfied, and a difference between the maximum value and the minimum value of an area proportion (%) of a binder in an area of a field of view of each image of cross-sections of the negative electrode active material layer in a case where a plurality of arbitrary places is selected in a plane of the negative electrode active material layer is within 10%. ### Claim 2 (depends on 1) The non-aqueous electrolyte secondary battery according to claim 1, wherein the binder contained in the negative electrode active material layer comprises at least styrene-butadiene rubber. ### Claim 3 (depends on 1) The non-aqueous electrolyte secondary battery according to claim 1, wherein a difference between the maximum value and the minimum value of an area proportion (%) of pores in each image of cross-sections of the negative electrode active material layer in a case where a plurality of arbitrary places is selected in a plane of the negative electrode active material layer is within 10%. ### Claim 4 (depends on 1) The non-aqueous electrolyte secondary battery according to claim 1, wherein the positive electrode active material comprises a lithium nickel-based composite oxide represented by the General Formula (1): LiaNibMncCodMxO2, wherein (provided that, a, b, c, d, and x satisfy 0.9≤a≤1.2, 0