# US 8,785,051 B2 · Nonaqueous-electrolyte battery and method for producing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,785,051 B2 - Document ID: US8785051B2 - Status: Granted - Kind: B2 - Application number: 13/816,939 - Filed: 2011-08-24 - Published: 2013-06-06 - Granted: 2014-07-22 - Earliest claimed: 2010-08-26 - Assignees: Sumitomo Electric Industries, Ltd. - Applicants: Yasushi Mochida; Mitsuyasu Ueda; Kentaro Yoshida; Tomoharu Takeyama; Kazuhiro Goto - Inventors: Yasushi Mochida; Mitsuyasu Ueda; Kentaro Yoshida; Tomoharu Takeyama; Kazuhiro Goto - Web page: https://patentgrep.com/patent/US8785051B2 ## CPC - H01M 10/0561: the electrolyte being constituted of inorganic materials only - H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx - H01M 10/052: Li-accumulators - H01M 10/0562: Solid materials - H01M 10/0585: of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators - H01M 2300/0068: inorganic - H01M 2300/0094: in the form of layered products, e.g. coatings - Y02E 60/10: Energy storage using batteries - Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product - Y10T 29/49115: including coating or impregnating - 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 - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract Provided are a nonaqueous-electrolyte battery in which short circuits between the positive- and negative-electrode layers can be suppressed with certainty and a method for producing the battery. A nonaqueous-electrolyte battery 100 includes a positive-electrode active-material layer 12 containing a Li-containing oxide; a negative-electrode active-material layer 22 on which deposition of Li metal can occur; and a sulfide-solid-electrolyte layer (SE layer) 3 disposed between these active-material layers 12 and 22. The SE layer 3 of the nonaqueous-electrolyte battery 100 includes a powder-formed layer 31 and a dense-film layer 32 formed on a surface of the powder-formed layer 31 by a vapor-phase process. In the nonaqueous-electrolyte battery 100, the powder-formed layer 31 is formed by a compression-molding process on a positive-electrode body including the positive-electrode active-material layer 12 and the dense-film layer 32 is then formed by a vapor-phase process on the positive-electrode body that is provided with the powder-formed layer 31 and serves as a substrate. ## Claims ### Claim 1 A nonaqueous-electrolyte battery comprising a positive-electrode active-material layer containing a Li-containing oxide; a negative-electrode active-material layer on which deposition of Li metal can occur; and a sulfide-solid-electrolyte layer disposed between these active-material layers, wherein the sulfide-solid-electrolyte layer includes a powder-formed layer formed on a positive-electrode-active-material-layer side of the sulfide-solid-electrolyte layer, and a dense-film layer formed on a surface of the powder-formed layer by a vapor-phase process, wherein the sulfide-solid-electrolyte layer includes an additional powder-formed layer, and the additional powder-formed layer is formed between the dense-film layer and the negative-electrode active-material layer, and wherein a dense-film-layer-side surface of the additional powder-formed layer has a surface roughness Rz of 1 μm or less. ### Claim 2 (depends on 1) The nonaqueous-electrolyte battery according to claim 1, wherein the sulfide-solid-electrolyte layer has a thickness of 1 mm or less. ### Claim 3 (depends on 1) The nonaqueous-electrolyte battery according to claim 1, wherein the powder-formed layer has a thickness of 900 μm or less. ### Claim 4 (depends on 1) The nonaqueous-electrolyte battery according to claim 1, wherein the dense-film layer has a thickness of 100 μm or less. ### Claim 5 A method for producing a nonaqueous-electrolyte battery including a positive-electrode active-material layer containing a Li-containing oxide, a negative-electrode active-material layer on which deposition of Li metal can occur, and a sulfide-solid-electrolyte layer disposed between these active-material layers, the method comprising: a step of producing a positive-electrode body including the positive-electrode active-material layer; a step of forming a powder-formed layer serving as a part of the sulfide-solid-electrolyte layer, on the positive-electrode body; and a step of forming a dense-film layer serving as a part of the sulfide-solid-electrolyte layer, on the powder-formed layer by a vapor-phase process, wherein the sulfide-solid-electrolyte layer includes an additional powder-formed layer, and the additional powder-formed layer is formed between the dense-film layer and the negative-electrode active-material layer, and wherein a dense-film-layer-side surface of the additional powder-formed layer has a surface roughness Rz of 1 μm or less. ### Claim 6 (depends on 5) The method for producing a nonaqueous-electrolyte battery according to claim 5, wherein the powder-formed layer is formed by a compression-molding process. ### Claim 7 (depends on 5) The method for producing a nonaqueous-electrolyte battery according to claim 5, wherein the powder-formed layer is formed by a coating process. ### Claim 8 (depends on 5) The method for producing a nonaqueous-electrolyte battery according to claim 5, wherein the positive-electrode body is produced by preparing a positive-electrode collector and forming the positive-electrode active-material layer on the positive-electrode collector by a coating process. ### Claim 9 (depends on 5) The method for producing a nonaqueous-electrolyte battery according to claim 5, comprising: a step of producing a positive-electrode-body-side multilayer body, the step including a substep of producing a positive-electrode body including the positive-electrode active-material layer; a substep of forming a powder-formed layer serving as a part of the sulfide-solid-electrolyte layer, on the positive-electrode body; and a substep of forming a dense-film layer serving as a part of the sulfide-solid-electrolyte layer, on the powder-formed layer by a vapor-phase process; a step of producing a negative-electrode-body-side multilayer body, the step including a substep of producing a negative-electrode body including the negative-electrode active-material layer; a substep of forming a powder-formed layer serving as a part of the sulfide-solid-electrolyte layer, on the negative-electrode body; and a substep of forming a dense-film layer serving as a part of the sulfide-solid-electrolyte layer, on the powder-formed layer by a vapor-phase process; and a step of press-bonding the positive-electrode-body-side multilayer body and the negative-electrode-body-side multilayer body together such that the dense-film layers of the multilayer bodies are in contact with each other.