Patents by Inventor Sho Urata

Sho Urata has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240063377
    Abstract: A non-aqueous electrolyte secondary battery provided with a positive electrode, a negative electrode, and a non-aqueous electrolyte. The negative electrode includes a negative electrode current collector and a negative electrode mixture layer formed on the surface of the negative electrode current collector. The negative electrode mixture layer includes a first negative electrode mixture layer opposite to the negative electrode current collector, and a second negative electrode mixture layer laminated on the surface of the first negative electrode mixture layer. The negative electrode mixture layer includes graphite particles and a highly dielectric material having a higher dielectric constant than the graphite particles. The porosity between the graphite particles in the second negative electrode mixture layer is greater than in the first negative electrode mixture layer.
    Type: Application
    Filed: January 14, 2022
    Publication date: February 22, 2024
    Applicant: Panasonic Energy Co., Ltd.
    Inventors: Akihiro Katogi, Takamitsu Tashita, Fumikazu Mizukoshi, Sho Urata
  • Patent number: 11870076
    Abstract: A water-based binder for a non-aqueous electrolyte secondary battery. A binder for a non-aqueous electrolyte secondary battery electrode, includes a crosslinked polymer having a carboxyl group or a salt thereof, and the crosslinked polymer includes a structural unit derived from an ethylenically unsaturated carboxylic acid monomer; and a structural unit derived from a macromonomer including at least one compositional monomer selected from compounds represented by following formula (1): [C1] H2C?CR1—X??formula (1) wherein in formula (1), R1 represents a hydrogen or a methyl group; X represents C(?O)OR2 or CN; and R2 represents a straight chain or branched C1-C8 alkyl group or a C3-C8 alkyl group having an alicyclic structure.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: January 9, 2024
    Assignees: TOAGOSEI CO., LTD., PANASONIC ENERGY CO., LTD.
    Inventors: Naohiko Saito, Takashi Hasegawa, Atsushi Nishiwaki, Hideo Matsuzaki, Nobuhiro Sakitani, Sho Urata, Takaharu Morikawa
  • Patent number: 11773246
    Abstract: A binder for a non-aqueous electrolyte secondary battery electrode that includes a crosslinked polymer having a carboxyl group or a salt thereof, wherein the crosslinked polymer includes 50% by mass or more and 100% by mass or less structural unit derived from an ethylenically unsaturated carboxylic acid monomer relative to all structural units, wherein a total amount of the ethylenically unsaturated carboxylic acid monomer and a salt thereof in terms of a non-neutralized form which is converted from the ethylenically unsaturated carboxylic acid monomer and a salt thereof relative to a total amount of the crosslinked polymer and a salt thereof is 5.0% by mass or less.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: October 3, 2023
    Assignees: TOAGOSEI CO. LTD., PANASONIC ENERGY CO., LTD.
    Inventors: Takashi Hasegawa, Naohiko Saito, Atsushi Nishiwaki, Hideo Matsuzaki, Sho Urata, Nobuhiro Sakitani, Takaharu Morikawa
  • Publication number: 20230080854
    Abstract: The non-aqueous electrolyte secondary battery according to one embodiment of the present disclosure comprises a wound-type electrode body. A negative electrode has: a negative electrode current collector; a double-sided coated part in which a negative electrode mixture layer including a negative electrode active material and a binder is formed on the surface of the negative electrode current collector, and a negative electrode mixture layer is formed on both surfaces of the negative electrode current collector; and a one-sided coated part in which a negative electrode mixture layer is formed on one outer-periphery-side surface of the negative electrode current collector. At least a portion of the one-sided coated part is positioned on the outermost periphery of the electrode body. The swelling degree of the binder in the one-sided coated part is higher than the swelling degree of the binder in the double-sided coated part.
    Type: Application
    Filed: February 2, 2021
    Publication date: March 16, 2023
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Sho Urata, Nobuhiro Sakitani, Takaharu Morikawa
  • Publication number: 20210313581
    Abstract: A battery including a coiled electrode assembly with positive and negative electrodes coiled with a separator interposed therebetween, where the negative electrode includes a negative electrode current collector, a first negative electrode mixture layer formed on a first surface of the negative electrode current collector, the first surface facing an outside of the electrode assembly, and a second negative electrode mixture layer formed on a second surface of the negative electrode current collector, the second surface facing an inside of the electrode assembly. The first negative electrode mixture layer contains cellulose and rubber binders. A content of the cellulose binder is larger near a surface of the mixture layer than near the negative electrode current collector and a content of the rubber binder is larger near the negative electrode current collector than near the surface of the mixture layer in the thickness direction of the first negative electrode mixture layer.
    Type: Application
    Filed: April 26, 2019
    Publication date: October 7, 2021
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Sho Urata, Nobuhiro Sakitani
  • Patent number: 11024837
    Abstract: A nonaqueous electrolyte secondary battery according to an embodiment includes an electrode body, which is formed by winding a positive electrode and a negative electrode through a separator and then compressing into a flat shape, and a nonaqueous electrolyte. The positive electrode contains a lithium transition metal oxide which contains tungsten oxide adhering to the particle surfaces thereof. The negative electrode contains a negative electrode active material, which has particle surfaces coated with an amorphous carbon film, and at least one of polyacrylic acid and a salt thereof. The pressure acting in the thickness direction of the electrode body is 5×10?2 MPa or more.
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: June 1, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Akihiko Takada, Sho Urata, Kouhei Tuduki, Fumiharu Niina, Katsunori Yanagida
  • Publication number: 20200263019
    Abstract: A binder for a non-aqueous electrolyte secondary battery electrode that includes a crosslinked polymer having a carboxyl group or a salt thereof, wherein the crosslinked polymer includes 50% by mass or more and 100% by mass or less structural unit derived from an ethylenically unsaturated carboxylic acid monomer relative to all structural units, wherein a total amount of the ethylenically unsaturated carboxylic acid monomer and a salt thereof in terms of a non-neutralized form which is converted from the ethylenically unsaturated carboxylic acid monomer and a salt thereof relative to a total amount of the crosslinked polymer and a salt thereof is 5.0% by mass or less.
    Type: Application
    Filed: March 5, 2018
    Publication date: August 20, 2020
    Applicants: TOAGOSEI CO. LTD., SANYO ELECTRIC CO., LTD.
    Inventors: Takashi HASEGAWA, Naohiko SAITO, Atsushi NISHIWAKI, Hideo MATSUZAKI, Sho URATA, Nobuhiro SAKITANI, Takaharu MORIKAWA
  • Publication number: 20200044254
    Abstract: A water-based binder for a non-aqueous electrolyte secondary battery. A binder for a non-aqueous electrolyte secondary battery electrode, includes a crosslinked polymer having a carboxyl group or a salt thereof, and the crosslinked polymer includes a structural unit derived from an ethylenically unsaturated carboxylic acid monomer; and a structural unit derived from a macromonomer including at least one compositional monomer selected from compounds represented by following formula (1): [C1] H2C?CR1—X??formula (1) wherein in formula (1), R1 represents a hydrogen or a methyl group; X represents C(?O)OR2 or CN; and R2 represents a straight chain or branched C1-C8 alkyl group or a C3-C8 alkyl group having an alicyclic structure.
    Type: Application
    Filed: March 5, 2018
    Publication date: February 6, 2020
    Applicants: TOAGOSEI CO., LTD., SANYO ELECTRIC CO., LTD.
    Inventors: Naohiko SAITO, Takashi HASEGAWA, Atsushi NISHIWAKI, Hideo MATSUZAKI, Nobuhiro SAKITANI, Sho URATA, Takaharu MORIKAWA
  • Publication number: 20190181423
    Abstract: A nonaqueous electrolyte secondary battery according to an embodiment includes an electrode body, which is formed by winding a positive electrode and a negative electrode through a separator and then compressing into a flat shape, and a nonaqueous electrolyte. The positive electrode contains a lithium transition metal oxide which contains tungsten oxide adhering to the particle surfaces thereof. The negative electrode contains a negative electrode active material, which has particle surfaces coated with an amorphous carbon film, and at least one of polyacrylic acid and a salt thereof. The pressure acting in the thickness direction of the electrode body is 5×10?2 MPa or more.
    Type: Application
    Filed: July 28, 2017
    Publication date: June 13, 2019
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Akihiko Takada, Sho Urata, Kouhei Tuduki, Fumiharu Niina, Katsunori Yanagida
  • Patent number: 10193183
    Abstract: The invention provides nonaqueous electrolyte secondary batteries having excellent output characteristics during large-current charging and discharging. A nonaqueous electrolyte secondary battery according to one aspect of the invention includes a positive electrode including a lithium transition metal oxide, a negative electrode including a negative electrode active material capable of storing and releasing lithium ions, and a nonaqueous electrolyte, the negative electrode active material including a carbon material as a main component, the negative electrode including a tungsten compound and/or a molybdenum compound. The tungsten compound and/or the molybdenum compound is preferably attached to the surface of the carbon material.
    Type: Grant
    Filed: February 13, 2015
    Date of Patent: January 29, 2019
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Sho Urata, Kaoru Nagata, Manabu Takijiri, Rie Matsuoka
  • Publication number: 20170062871
    Abstract: The invention provides nonaqueous electrolyte secondary batteries having excellent output characteristics during large-current charging and discharging. A nonaqueous electrolyte secondary battery according to one aspect of the invention includes a positive electrode including a lithium transition metal oxide, a negative electrode including a negative electrode active material capable of storing and releasing lithium ions, and a nonaqueous electrolyte, the negative electrode active material including a carbon material as a main component, the negative electrode including a tungsten compound and/or a molybdenum compound. The tungsten compound and/or the molybdenum compound is preferably attached to the surface of the carbon material.
    Type: Application
    Filed: February 13, 2015
    Publication date: March 2, 2017
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Sho Urata, Kaoru Nagata, Manabu Takijiri, Rie Matsuoka