Patents by Inventor Ayano SOFUE

Ayano SOFUE 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).

  • Patent number: 11437607
    Abstract: A composition that includes a dispersion stabilizer for an electrode coating liquid for a power storage device is provided. The composition has superior ability to stably disperse an electrode active material and a conductive material, and makes it possible to manufacture a uniform electrode, even when a dispersion device that has weak shear force is used. A dispersant for an electrode coating liquid for a power storage device, the dispersant being characterized by containing cellulose fibers that satisfy (a)-(c). (a) The number average width of the short widths is 2-200 nm. (b) The aspect ratio is 7.5-250. (c) Cellulose I crystals are included and the crystallinity thereof is 70%-95%.
    Type: Grant
    Filed: January 24, 2018
    Date of Patent: September 6, 2022
    Assignee: DAI-ICHI KOGYO SEIYAKU CO., LTD.
    Inventors: Ayano Sofue, Yasuteru Saito, Yosuke Goi, Yoshiki Ito, Tetsuya Higashizaki, Yuji Hoshihara, Masaaki Matsumoto
  • Publication number: 20220200003
    Abstract: Provided are an electrode binder composition that provides an electrode that exhibits high durability even when an active material that shows a large volume change is used, a power storage device electrode produced using the electrode binder composition, and a power storage device including the power storage device electrode. An electrode binder composition contains (A) one or more polymers selected from the group consisting of fluoropolymers, butadiene polymers, and thermoplastic elastomers, (B) a fibrous nanocarbon material having an average fiber diameter of 0.5 nm or more and 20 nm or less and a fiber length of 0.5 ?m or more and 1 mm or less, (C) a cellulose material, (D) a nanocellulose fiber, and (E) water. The mass ratio between (A) and (B) is (A)/(B)=60/40 to 98/2.
    Type: Application
    Filed: March 5, 2020
    Publication date: June 23, 2022
    Applicant: DKS Co. Ltd.
    Inventors: Ayano SOFUE, Toshiya WATANABE, Yasuteru SAITO
  • Publication number: 20220200001
    Abstract: Provided are an electrode binder composition that provides an electrode that exhibits high durability even when an active material that shows a large volume change is used, an electrode coating liquid composition containing the electrode binder composition, a power storage device electrode including an electrode mixture layer containing a solid of the electrode coating liquid composition, and a power storage device including the power storage device electrode. An electrode binder composition includes (A) a polyurethane, (B) a fibrous nanocarbon material having an average fiber length of 0.5 ?m or more, and (C) water. The polyurethane is obtained by reacting together (a) a polyisocyanate, (b) a polyol, (c) a compound having one or more active hydrogen groups and a hydrophilic group, and (d) a chain extender. (b) contains an olefinic polyol having 1.5 or more active hydrogen groups and/or a carbonate diol having less than 6 carbon atoms between carbonate bond chains.
    Type: Application
    Filed: March 5, 2020
    Publication date: June 23, 2022
    Applicant: DKS Co. Ltd.
    Inventors: Ayano SOFUE, Toshiya WATANABE, Yasuteru SAITO
  • Patent number: 11342560
    Abstract: An electrode coating liquid composition that contains an electrode active material, a conductive auxiliary, a dispersant, and a binding agent. The dispersant contains cellulose fibers that satisfy (a)-(c). A total amount of the dispersant and the binding agent is 0.5 mass % or more and 15 mass % or less with respect to 100 mass % of the solid content of the electrode coating liquid composition. (a) the number average width of the shortest widths is 2 nm or more and 200 nm or less. (b) the aspect ratio is 7.5 or more and 75 or less. (c) cellulose I crystals are included and the crystallinity thereof is 70% or more and 95% or less.
    Type: Grant
    Filed: January 24, 2018
    Date of Patent: May 24, 2022
    Assignee: DAI-CHI KOGYO SEIYAKU CO., LTD.
    Inventors: Ayano Sofue, Yasuteru Saito, Yosuke Goi, Yoshiki Ito, Tetsuya Higashizaki, Yuji Hoshihara, Masaaki Matsumoto
  • Patent number: 11289693
    Abstract: Provided is a lithium-ion battery or lithium-ion capacitor electrode material that can compensate for the drawbacks of a hydrophobic active material, that can impart hydrophilicity to the hydrophobic active material, and that can exhibit excellent dispersibility without deteriorating electrode characteristics. Specifically provided is an electrode material for a lithium-ion battery or a lithium-ion capacitor, the electrode material comprising a composite powder in which a B component is supported or coated on a surface of an A component, the A component comprising a material capable of electrochemically occluding and releasing lithium ions, the B component being sulfur-modified cellulose, and the B component being contained in an amount of 0.01 mass % or more based on 100 mass % of the total amount of the A component and the B component.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: March 29, 2022
    Assignees: DAI-ICHI KOGYO SEIYAKU CO., LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Takashi Mukai, Yuta Ikeuchi, Masahiro Yanagida, Yasuteru Saitou, Ayano Sofue, Tetsuya Higashizaki
  • Publication number: 20210226217
    Abstract: An electrode coating liquid composition that contains an electrode active material, a conductive auxiliary, a dispersant, and a binding agent. The dispersant contains cellulose fibers that satisfy (a)-(c). A total amount of the dispersant and the binding agent is 0.5 mass % or more and 15 mass % or less with respect to 100 mass % of the solid content of the electrode coating liquid composition. (a) the number average width of the shortest widths is 2 nm or more and 200 nm or less. (b) the aspect ratio is 7.5 or more and 75 or less. (c) cellulose I crystals are included and the crystallinity thereof is 70% or more and 95% or less.
    Type: Application
    Filed: January 24, 2018
    Publication date: July 22, 2021
    Applicant: DAI-ICHI KOGYO SEIYAKU CO.,LTD.
    Inventors: Ayano SOFUE, Yasuteru SAITO, Yosuke GOI, Yoshiki ITO, Tetsuya Higashizaki, Yuji Hoshihara, Masaaki MATSUMOTO
  • Publication number: 20210210740
    Abstract: A composition that includes a dispersion stabilizer for an electrode coating liquid for a power storage device is provided. The composition has superior ability to stably disperse an electrode active material and a conductive material, and makes it possible to manufacture a uniform electrode, even when a dispersion device that has weak shear force is used. A dispersant for an electrode coating liquid for a power storage device, the dispersant being characterized by containing cellulose fibers that satisfy (a)-(c). (a) The number average width of the short widths is 2-200 nm. (b) The aspect ratio is 7.5-250. (c) Cellulose I crystals are included and the crystallinity thereof is 70%-95%.
    Type: Application
    Filed: January 24, 2018
    Publication date: July 8, 2021
    Applicant: DAI-ICHI KOGYO SEIYAKU CO., LTD.
    Inventors: Ayano SOFUE, Yasuteru SAITO, Yosuke GOI, Yoshiki ITO, Tetsuya Higashizaki, Yuji Hoshihara, Masaaki MATSUMOTO
  • Publication number: 20200251720
    Abstract: Provided is a lithium-ion battery or lithium-ion capacitor electrode material that can compensate for the drawbacks of a hydrophobic active material, that can impart hydrophilicity to the hydrophobic active material, and that can exhibit excellent dispersibility without deteriorating electrode characteristics. Specifically provided is an electrode material for a lithium-ion battery or a lithium-ion capacitor, the electrode material comprising a composite powder in which a B component is supported or coated on a surface of an A component, the A component comprising a material capable of electrochemically occluding and releasing lithium ions, the B component being sulfur-modified cellulose, and the B component being contained in an amount of 0.01 mass % or more based on 100 mass % of the total amount of the A component and the B component.
    Type: Application
    Filed: July 23, 2018
    Publication date: August 6, 2020
    Applicants: DAI-ICHI KOGYO SEIYAKU CO., LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Takashi MUKAI, Yuta IKEUCHI, Masahiro YANAGIDA, Yasuteru SAITOU, Ayano SOFUE, Tetsuya HIGASHIZAKI