Nissan Motor Company Limited

Sanyo Chemical Industries, Ltd.

Idemitsu Kosan Company, Limited

Gunze Limited

Sanyo Chemical Ltd.

Hiroshi Akama

Hideaki Horie

Yasuhiko Ohsawa

Yuki Kusachi

Hajime Satou

Yusuke Mizuno

Yasuhiro Shindo

Yasuhiro Tsudo

Kenichi Kawakita

Hiroshi Fukumoto

Masatoshi Okura

Yusuke Nakashima

Yasunari Hanaki

Motohisa Kamijo

Hitoshi Onodera

Yuta Murakami

Manabu Watanabe

Katsuo Suga

Toru Sekiba

Toru Nishizawa

Naofumi Shoji

Hideaki Morisaka

Maki Shimada

Maki Kamikubo

Ryosuke Kusano

Kazuya Minami

Takahiro Imaishi

Takuya Suenaga

Junji Ito

Hideki Nishimura

Masashi Ito

Motohiro Shinzawa

Hironori Wakamatsu

Yasuhisa Kitahara

Masahiro Takaya

Mikio Kawai

Kazuhiko Shinohara

Hiroaki Kaneko

Yoshimi Kawashima

Yoshiaki Hiramoto

Hiroyuki Kanesaka

Yusuke Emori

Toshiaki Hayasaka

Yusuke Mori

Kazuya Tsuchida

Kotaro Nasu

Yoshihiro Ikeda

Kazuaki Onishi

Masayuki Fukuhara

Junji Itou

Tomoya Ohta

Jyunji Itou

Yasuhide Kano

Yasuji Maruyama

The present invention aims to provide a method for producing a pinhole-free thin resin current collector for negative electrodes. The method for producing a sheet-shaped resin current collector for negative electrodes of the present invention includes stacking three or more layers of melts of conductive resin compositions each containing a polyolefin and a conductive filler to obtain a multilayered body, wherein the polyolefin contained in each of the conductive resin compositions that form the respective layers of the multilayered body has a melt mass flow rate of 15 to 70 g/10 min as measured at a temperature of 230° C. and a load of 2.16 kg in accordance with JIS K7210-1:2014.

Method for producing resin collector for negative electrodes, method for producing negative electrode for lithium ion batteries, and method for producing lithium ion battery

To provide a negative electrode for a non-aqueous electrolyte secondary battery that can be produced even without performing a heat treatment at a high temperature such as 2,000&#xb0; C. or higher and can have the discharge capacity and the cycle characteristics (capacity retention) further increased. The negative electrode for a non-aqueous electrolyte secondary battery according to the invention has a configuration in which a negative electrode active material layer containing a negative electrode material and a binder is formed on the surface of a current collector. Further, the negative electrode material has a core portion including carbonaceous negative electrode active material particles; and a shell portion including a polyimide and silicon-based negative electrode active material particles and/or tin-based negative electrode active material particles. Here, there is a feature that the content of the silicon-based negative electrode active material particles and/or tin-based negative electrode active material particles with respect to 100% by mass of the content of the carbonaceous negative electrode active material particles is 2% to 20% by mass. Furthermore, there is a feature that the binder is formed of a hydrophilic unit and a hydrophobic unit bonded together.

Negative electrode for non-aqueous electrolyte secondary battery and non-aqueous electrolyte secondary battery using the same

The battery pack has a laminated body in which unit cells are laminated one on another, a cell case having a first opening and containing the laminated body, and a first lid member to tightly close the first opening. The first opening is positioned to face, in connection with a unit cell laminated direction, a first face of the laminated body. The first lid member is configured to, if an internal pressure of the cell case is lower than atmospheric pressure, deform while keeping the tightly closing state, come into contact with the first face of the laminated body, and apply a pressure based on a differential pressure between atmospheric pressure and the internal pressure of the cell case to the contacting face.

Battery pack

The present invention provides a viscous adhesive capable of retaining the shape of an electrode and allowing for production of an electrode for a lithium-ion battery having a structure in which the energy density of the electrode does not decrease. The present invention relates to a viscous adhesive for a lithium-ion electrode which allows active materials to adhere to each other in a lithium-ion electrode, the viscous adhesive having a glass transition temperature of 60&#xb0; C. or lower, a solubility parameter of 8 to 13 (cal/cm), and a storage shear modulus and a loss shear modulus of 2.0&#xd7;10to 5.0&#xd7;10Pa as measured in a frequency range of 10to 10Hz at 20&#xb0; C., wherein the viscous adhesive is an acrylic polymer essentially containing a constituent unit derived from a (meth)acrylic acid alkyl ester monomer, the proportion of the (meth)acrylic acid alkyl ester monomer in monomers constituting the viscous adhesive is 50 wt % or more based on the total monomer weight, and the proportion of a fluorine-containing monomer is less than 3 wt % based on the total monomer weight.

Adhesive for lithium-ion electrode, electrode for lithium-ion battery and method for manufacturing electrode for lithium-ion battery

A resin current collector provides means for improving the cycle characteristics in a lithium ion battery and includes a polyolefin resin, and a conductive carbon filler. The total surface area of the conductive carbon filler contained in 1 g of the resin current collector is 7.0 mor more and 10.5 mor less.

Resin current collector, multilayer current collector and lithium ion battery

The present invention aims to provide an electrode for lithium ion batteries which exhibits excellent electrical conductivity even if its thickness is large. The electrode for lithium ion batteries of the present invention includes a first main surface to be located adjacent to a separator of a lithium ion battery and a second main surface to be located adjacent to a current collector of the lithium ion battery. The electrode has a thickness of 150 to 5000 &#x3bc;m. The electrode contains, between the first main surface and the second main surface, a conductive member (A) made of an electronically conductive material and a large number of active material particles (B). At least part of the conductive member (A) forms a conductive path that electrically connects the first main surface to the second main surface. The conductive path is in contact with the active material particles (B) around the conductive path.

Electrode for lithium-ion cell, lithium-ion cell, and method for manufacturing electrode for lithium-ion cell

An object of the present invention is to provide a negative electrode active material capable of reducing the irreversible capacity of a lithium ion battery. The present invention provides a coated negative electrode active material for lithium ion batteries wherein at least a portion of the surface of a particulate negative electrode active material for lithium ion batteries is coated with a coating agent and the coated negative electrode active material is doped with at least one of lithium and lithium ions.

Coated negative-electrode active material for use in lithium-ion battery, slurry for use in lithium-ion battery, negative electrode for use in lithium-ion battery, lithium-ion battery, and method for manufacturing coated negative-electrode active material for use in lithium-ion battery

The present invention provides a method of producing an electrode active material molded body for a lithium-ion battery suitable for the production of a lithium-ion battery, and a method of producing a lithium-ion battery using the electrode active material molded body, wherein the methods can reduce the time, work, equipment, and the like required for the production. The present invention provides a method of producing an electrode composition molded body for a lithium-ion battery, including: a molding step of molding a composition containing an electrode active material for a lithium-ion battery and an electrolyte solution into an electrode active material molded body for a lithium-ion battery as an unbound product of the electrode active material for a lithium-ion battery, wherein the composition has an electrolyte solution content of 0.1 to 40 wt % based on the weight of the composition.

Method for manufacturing electrode active material molding for lithium-ion battery and method for manufacturing lithium-ion battery

To provide a structure which allows production of an electrode, even if the film thickness of an electrode is increased; and a non-aqueous electrolyte secondary battery using the same. A non-aqueous electrolyte secondary battery including a power generating element including: two electrodes having different polarity and formed by forming an active material layer on a current collector; and an electrolyte layer positioned between the electrodes, wherein at least one of the active material layers of the two electrodes having different polarity contains an active material and a conductive member made from an electron conducting material, the active material layer has a first principal surface which comes into contact with the electrolyte layer side, and a second principal surface which comes into contact with the current collector side, at least a part of the conductive member forms a conductive path electrically connecting the first principal surface to the second principal surface, and the conductive path is in contact with the active material in the periphery of the conductive path, at least a part of the surface of the active material is coated with a coating agent that includes a coating resin and a conduction assisting agent, and an electrolyte solution contained in the electrolyte layer or the two electrodes having different polarity is a gel phase electrolyte.

Non-aqueous electrolyte secondary battery and method for manufacturing the same

To provide a positive electrode for a lithium ion battery having high energy density and being capable of rapid discharging. A positive electrode for a lithium ion battery, the positive electrode including a positive electrode current collector, a positive electrode active material layer formed on the surface of the positive electrode current collector, and a non-aqueous liquid electrolyte including an electrolyte containing lithium ions and a non-aqueous solvent, in which the positive electrode active material layer includes a positive electrode active material and voids, the voids are filled with the non-aqueous liquid electrolyte, and a proportion of the battery capacity based on a total amount of lithium ions in the non-aqueous liquid electrolyte existing in the positive electrode active material layer with respect to the battery capacity based on a total amount of the positive electrode active material is 3.5 to 15%.

Positive electrode for lithium ion battery and lithium ion battery

A laminate type battery includes a power generating element and an outer casing body. The power generating element is formed by electrically laminating in series a plurality of single battery layers in which a single battery layer is formed by sequentially laminating a positive electrode current collector, a positive electrode active material layer, an electrolyte layer, a negative electrode active material layer, and a negative electrode current collector. The power generating element is disposed inside the outer casing body. At least one of the positive electrode current collector or the negative electrode current collector includes a resin layer having conductivity. The single battery layer including the resin layer is electrically connected to an adjacent single battery layer via at least one resistance reduction layer.

Laminate type battery and method for producing the same

The objective of the present invention is to provide an electrode for a lithium ion battery which has excellent electron conductivity even when the thickness of the electrode is increased. The electrode for a lithium ion battery according to the present invention includes a first principal surface located on a separator side of the lithium ion battery, and a second principal surface located on a current collector side, wherein the electrode has a thickness of 50 to 5000 &#x3bc;m, and the electrode includes, between the first principal surface and the second principal surface, short fibers (A) having an average fiber length of 50 nm or more and less than 100 &#x3bc;m, long fibers (B) having an average fiber length of 100 &#x3bc;m or more and 1000 &#x3bc;m or less, and active material particles (C), and the short fibers (A) and the long fibers (B) are electroconductive fibers.

Electrode for lithium ion battery, lithium ion battery, and method for producing electrode for lithium ion battery

To provide a negative electrode for a lithium ion battery having high energy density and excellent rapid charging characteristics. A negative electrode for a lithium ion battery, the negative electrode including a negative electrode current collector, a negative electrode active material layer formed on the surface of the negative electrode current collector, and a non-aqueous liquid electrolyte including an electrolyte containing lithium ions and a non-aqueous solvent, in which the negative electrode active material layer includes a negative electrode active material and voids, the voids are filled with the non-aqueous liquid electrolyte, and a proportion of the battery capacity based on a total amount of lithium ions in the non-aqueous liquid electrolyte existing in the negative electrode active material layer with respect to the battery capacity based on a total amount of the negative electrode active material is 3% to 17%.

Negative electrode for lithium ion battery and lithium ion battery

An object of the present invention is to provide a dispersant for a resin current collector which can uniformly disperse a conductive filler to attain sufficient charge and discharge characteristics without impairing the output power per unit weight of a battery. The present invention provides a dispersant for a resin current collector comprising a polymer having a resin-philic block (A1) and a conductive filler-philic block (A2).

Dispersant for resin collectors, material for resin collectors, and resin collector

Growing community of inventors

Kanagawa, Japan

Hiroshi Akama