Toyota Jidosha Kabushiki Kaisha

Panasonic Intellectual Property Management Co., Ltd.

Panasonic Holdings Corporation

Naoto Onodera

Tatsuya Hashimoto

Hiroya Umeyama

Yusuke Fukumoto

Naoyuki Wada

Yuji Yokoyama

Takashi Kubo

Kaoru Inoue

Katsunori Yanagida

Hideki Sano

Koichi Toriyama

Yutaka Oyama

Atsushi Sugihara

Ryosuke Ohsawa

Toshinari Noda

Hiroki Kamiguchi

Yo Kato

Nobuo Sashinaka

Shoichi Taji

Ryosuke Meshii

Naoki Ota

This negative electrode comprises an electrode current collector, and an electrode mixture layer provided on a surface of the electrode current collector. When, with respect to the thickness direction of the electrode mixture layer, a range from the surface on the side of the electrode current collector to 40% of the thickness of the electrode mixture layer is defined as a first region, and a range from the surface on the side opposite to the electrode current collector to 40% of the thickness of the electrode mixture layer is defined as a second region, the first region and the second region have different volume change ratio upon charge and discharge, and the region having the larger volume change ratio upon charge and discharge has a higher content of a solid inorganic filler and a lower content of a hollow inorganic filler than the region having the smaller volume change ratio.

Negative electrode for non-aqueous electrolyte secondary battery, and non-aqueous electrolyte secondary battery

A negative electrode includes at least a negative electrode composite material layer. The negative electrode composite material layer contains at least composite particles and a binder. Each composite particle includes a negative electrode active material particle and a film. The film covers at least part of a surface of the negative electrode active material particle. The film contains a layered silicate mineral. The binder includes nanofibers.

Negative electrode, battery, and method of producing negative electrode

A negative electrode active material, a first carbon material, a thickener, and a solvent are mixed to prepare a first dispersion solution. The first dispersion solution and a second carbon material are mixed to prepare a second dispersion solution. The second dispersion solution and a binder are mixed to prepare a negative electrode paint. The negative electrode paint is applied to a surface of a negative electrode current collector and dried to produce a negative electrode for a nonaqueous electrolyte secondary battery. The negative electrode active material has a BET specific surface area of 3 m/g or more and 8 m/g or less. The first carbon material has a BET specific surface area of 30 m/g or more and 100 m/g or less. The second carbon material has a BET specific surface area of 200 m/g or more and 500 m/g or less.

Method of producing negative electrode for nonaqueous electrolyte secondary battery and method of producing nonaqueous electrolyte secondary battery

A method of producing a non-aqueous electrolyte secondary battery includes at least the following (&#x3b1;), (&#x3b2;), and (&#x3b4;): (&#x3b1;) preparing an elementary battery including at least a positive electrode, a negative electrode, a gel film, and an electrolyte solution; (&#x3b2;) carrying out initial charge of the elementary battery; and (&#x3b4;) after the initial charge, processing the elementary battery to produce a finished-product battery. The negative electrode includes at least a negative electrode active material. The gel film is formed on a surface of the negative electrode. The gel film contains a polymer material and the electrolyte solution. The gel film is thixotropic. The initial charge is carried out while the gel film is under a first pressure. The processing is carried out in such a way that the gel film is put under a second pressure. The second pressure is higher than the first pressure.

Method of producing non-aqueous electrolyte secondary battery

A manufacturing method for a non-aqueous electrolyte secondary battery includes: forming a powder; forming a sheet-like green compact; and forming a heat-resistant layer. The powder contains composite particles and a solvent. The composite particles contain inorganic filler particles and a binder. The green compact is formed by pressing the powder in a state in which the solvent remains. The heat-resistant layer is formed by disposing the green compact on a surface of at least any of a positive electrode mixture layer and a negative electrode mixture layer after the green compact is formed.

Manufacturing method for non-aqueous electrolyte secondary battery

A method for manufacturing an electrode sheet includes the steps of forming a granulated material containing a plurality of granules; forming an electrode mixture layer by molding the granulated material into a sheet; and placing the electrode mixture layer on electrode current collector foil. The step of forming the granulated material includes the steps of forming a granule containing at least an electrode active material and a binder; and adhering a polyglycerol fatty acid ester to a surface of the granule.

Method for manufacturing electrode sheet and electrode sheet

A method of manufacturing a positive electrode includes: preparing a current collector foil having a first main surface and a second main surface; obtaining a granulated body in which a solvent remains by mixing a positive electrode active material, a conductive material, a binder, and the solvent with each other to obtain a mixture and granulating the mixture; obtaining a first positive electrode mixture layer by pressing the granulated body into a sheet shape; arranging the first positive electrode mixture layer on the first main surface; and heating the current collector foil in a state where the first positive electrode mixture layer is arranged on the first main surface, such that a temperature of the current collector foil becomes a softening point of the current collector foil or higher and that a temperature of the first positive electrode mixture layer is lower than a melting point of the binder.

Method of manufacturing positive electrode for lithium ion secondary battery

A method of manufacturing a negative electrode for a nonaqueous electrolyte secondary battery includes: preparing a copper foil having a first main surface and a second main surface that are opposite sides of the copper foil; obtaining a granulated body by mixing a negative electrode active material, a thickener, a binder, and a solvent with each other to obtain a mixture and by granulating the mixture; obtaining a first negative electrode mixture layer by pressing the granulated body; arranging the first negative electrode mixture layer on the first main surface; and softening the copper foil by bringing the second main surface into contact with a heated roller in a state where the first negative electrode mixture layer is arranged on the first main surface. A temperature of the heated roller is a recrystallization temperature of the copper foil or higher.

Method of manufacturing negative electrode for nonaqueous electrolyte secondary battery

A nonaqueous electrolyte secondary battery includes: a negative electrode current collector foil; and a negative electrode mixture layer that is arranged on the negative electrode current collector foil. The negative electrode mixture layer contains a plurality of granulated particles. Each of the granulated particles contains a negative electrode active material and a coating film. The coating film is formed on a surface of the negative electrode active material. The coating film includes a first film and a second film. The first film is formed on the surface of the negative electrode active material. The second film is formed on the first film. The first film contains a carboxymethyl cellulose polymer. The second film contains a polyacrylic acid polymer.

Nonaqueous electrolyte secondary battery and method of manufacturing the same

A lithium ion secondary battery includes: an electrode mixture layer that contains an electrode active material and an organic ferroelectric having a dielectric constant of 25 or higher; and an electrolytic solution that contains lithium bis(fluorosulfonyl)imide and a nonaqueous solvent. A content of the organic ferroelectric is 0.5 parts by mass to 10 parts by mass with respect to 100 parts by mass of the electrode active material. A proportion of a high-polarity solvent having a dielectric constant of 10 or higher in the nonaqueous solvent is 10 vol % or lower.

Lithium ion secondary battery

Provided is a non-aqueous electrolyte secondary battery in which an increase in resistance is suppressed when high rate pulsed charging and discharging is repeatedly carried out. The non-aqueous electrolyte secondary battery provided by the present disclosure is provided with: a positive electrode; a negative electrode; a separator; and a non-aqueous electrolyte solution. The separator is provided with a separator base made of a non-woven fabric; a first resin layer provided on a surface of the separator base that faces the positive electrode; and a second resin layer provided on a surface of the separator base that faces the negative electrode. In addition, a resin matrix of the first resin layer is constituted from polytetrafluoroethylene or a copolymer containing polytetrafluoroethylene as a primary component, and a resin matrix of the second resin layer is constituted from poly(vinylidene fluoride) or a copolymer containing poly(vinylidene fluoride) as a primary component.

Non-aqueous electrolyte secondary battery

An infrared ray detecting element includes: a substrate having a cavity; an infrared ray detecting portion including, sequentially stacked, a lower electrode layer, a detection layer, and an upper electrode layer; first and second support portions which support the infrared ray detecting portion above the cavity; and first and second external lead portions for leading electrical signals outputted from the infrared ray detecting portion, to the outside. The first support portion includes, sequentially stacked, a first upper wiring pattern, a first insulating layer, and a first lower wiring pattern. The upper electrode layer is connected to the first external lead portion via the first upper wiring pattern. The second support portion includes, sequentially stacked, a second upper wiring pattern, a second insulating layer, and a second lower wiring pattern. The lower electrode layer is connected to the second external lead portion via the second lower wiring pattern.

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Hirakata, Japan

Naoto Onodera