Patents by Inventor Kazuki YACHI

Kazuki YACHI 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: 20220359881
    Abstract: The present invention provides an active material layer for an all-solid-state lithium secondary battery including at least an active material, a conductive aid, and a solid electrolyte, in which the active material layer has a gap, a ratio of the conductive aid in the active material layer is 0.1% by mass or more and less than 5.0% by mass, the conductive aid contains fibrous carbon having an average fiber diameter of 10 to 900 nm, and a ratio of the fibrous carbon in the conductive aid is 20% by mass or more.
    Type: Application
    Filed: June 26, 2020
    Publication date: November 10, 2022
    Applicant: Teijin Limited
    Inventors: Kazuki YACHI, Shinya KOMURA, Takahiro DAIDO
  • Patent number: 11387458
    Abstract: The present invention provides a carbon fiber aggregate that is characterized by comprising carbon fibers in which crystallite interplanar spacing (d002) measured using X-ray diffraction is 0.3400 nm or more, the average liber diameter being 10-900 nm, and the powder volume resistivity being 4.00×10?2 ?·cm or less when the packing density is 0.8 g/cm3.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: July 12, 2022
    Assignee: TEIJIN LIMITED
    Inventors: Kazuki Yachi, Asami Kanematsu, Shinya Komura, Takahiro Daido
  • Publication number: 20220181632
    Abstract: A polymeric binder includes an ion-conducting polymer containing a polymer and a metal ion. The polymer is preferably selected from the group consisting of polyester, polyether, anionic polymer, polycarbonate, and silicone. An all-solid-state secondary battery includes an inorganic solid electrolyte, and the inorganic solid electrolyte in at least an electrode mixture layer or an inorganic solid electrolyte layer is bound together by the polymeric binder.
    Type: Application
    Filed: March 27, 2020
    Publication date: June 9, 2022
    Applicant: TEIJIN LIMITED
    Inventors: Shuto ISHII, Junichi TOGASAKI, Kazuki YACHI, Tomoyoshi YAMAMOTO, Takahiro DAIDO
  • Publication number: 20220166026
    Abstract: A polymeric binder includes copolymerized aliphatic polycarbonate having structural units expressed by Formula (1) and Formula (2). In Formula (1) and Formula (2), R1 and R2 independently denote alkylene groups having 2 to 20 carbon atoms and being nonidentical to each other, and m and n independently denote integers equal to or greater than 3 and equal to or less than 60.
    Type: Application
    Filed: March 27, 2020
    Publication date: May 26, 2022
    Applicant: Teijin Limited
    Inventors: Shuto ISHII, Junichi TOGASAKI, Kazuki YACHI, Tomoyoshi YAMAMOTO, Takahiro DAIDO
  • Patent number: 11205773
    Abstract: The present invention provides an electrode mixture layer for nonaqueous electrolyte secondary batteries, which contains an electrode active material, a carbon-based conductive agent containing fibrous carbon having an average effective length of 10 ?m, and a binder, and which has a thickness of 50 ?m or more. This electrode mixture layer has an inner layer portion where the fibrous carbon is three-dimensionally dispersed in a random manner.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: December 21, 2021
    Assignee: TEIJIN LIMITED
    Inventors: Kazuki Yachi, Shinya Komura, Ryota Hirakawa, Takahiro Daido, Takashi Shiro
  • Patent number: 11066759
    Abstract: The present invention provides pitch-based ultrafine carbon fibers that have an average fiber diameter of at least 100 nm and less than 700 nm, and an average fiber length of 10 ?m or more, wherein C—O bonds >C?O bonds in terms of the abundance ratio (molar ratio) of C—O bonds and C?O bonds derived from the O1s orbital as measured by X-ray photoelectron spectroscopy.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: July 20, 2021
    Assignee: TEIJIN LIMITED
    Inventors: Ryota Hirakawa, Kazuki Yachi, Asami Kanematsu
  • Publication number: 20210143427
    Abstract: The present invention provides a carbon fiber aggregate that is characterized by comprising carbon fibers in which crystallite interplanar spacing (d002) measured using X-ray diffraction is 0.3400 nm or more, the average liber diameter being 10-900 nm, and the powder volume resistivity being 4.00×10?2 ?·cm or less when the packing density is 0.8 g/cm3.
    Type: Application
    Filed: February 3, 2017
    Publication date: May 13, 2021
    Applicant: TEIJIN LIMITED
    Inventors: Kazuki YACHI, Asami KANEMATSU, Shinya KOMURA, Takahiro DAIDO
  • Publication number: 20200099055
    Abstract: The purpose of the present invention is to provide an electrode active material layer exhibiting excellent mechanical strength. This electrode material for a non-aqueous electrolyte secondary battery includes at least an electrode active material, a carbon-based conductive auxiliary agent, and a binder. The carbon-based conductive auxiliary agent has a linear structure, and includes ultra-fine fibrous carbon having an average fibre diameter of more than 200 nm but not more than 900 nm. The electrode material configures an electrode active material layer in which the maximum tensile strength (?M) in a planar direction and the tensile strength (?T) in an in-plane direction orthogonal to the maximum tensile strength (?M) satisfy relational expression (a), namely ?M/?T?1.6.
    Type: Application
    Filed: November 26, 2019
    Publication date: March 26, 2020
    Applicant: TEIJIN LIMITED
    Inventors: Kazuki YACHI, Shinya KOMURA, Asami KANEMATSU, Takahiro DAIDO
  • Patent number: 10541417
    Abstract: The purpose of the present invention is to provide an electrode active material layer exhibiting excellent mechanical strength. This electrode material for a non-aqueous electrolyte secondary battery includes at least an electrode active material, a carbon-based conductive auxiliary agent, and a binder. The carbon-based conductive auxiliary agent has a linear structure, and includes ultra-fine fibrous carbon having an average fibre diameter of more than 200 nm but not more than 900 nm. The electrode material configures an electrode active material layer in which the maximum tensile strength (?M) in a planar direction and the tensile strength (?T) in an in-plane direction orthogonal to the maximum tensile strength (?M) satisfy relational expression (a), namely ?M/?T?1.6.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: January 21, 2020
    Assignee: TEIJIN LIMITED
    Inventors: Kazuki Yachi, Shinya Komura, Asami Kanematsu, Takahiro Daido
  • Publication number: 20180282909
    Abstract: The present invention provides pitch-based ultrafine carbon fibers that have an average fiber diameter of at least 100 nm and less than 700 nm, and an average fiber length of 10 ?m or more, wherein C—O bonds>C?O bonds in terms of the abundance ratio (molar ratio) of C—O bonds and C?O bonds derived from the O1s orbital as measured by X-ray photoelectron spectroscopy.
    Type: Application
    Filed: September 28, 2016
    Publication date: October 4, 2018
    Applicant: TEIJIN LIMITED
    Inventors: Ryota HIRAKAWA, Kazuki YACHI, Asami KANEMATSU
  • Publication number: 20180175391
    Abstract: The present invention provides: a fibrous carbon characterized in that the average effective fiber length is 1-100 ?m, and the crystallite length (La) measured using X-ray diffraction is 100-500 nm; an electrode mixture layer for a non-aqueous-electrolyte secondary cell, said mixture comprising an electrode active material and a carbon-based electroconductive auxiliary agent containing said fibrous carbon; an electrode for a non-aqueous-electrolyte secondary cell, the electrode comprising a collector and said electrode mixture layer for a non-aqueous-electrolyte secondary cell, the electrode mixture layer being laminated on the collector; and a non-aqueous-electrolyte secondary cell having said electrode for a non-aqueous-electrolyte secondary cell.
    Type: Application
    Filed: June 16, 2016
    Publication date: June 21, 2018
    Applicant: TEIJIN LIMITED
    Inventors: Shinya KOMURA, Ryota HIRAKAWA, Kazuki YACHI, Asami KANEMATSU, Takahiro DAIDO
  • Publication number: 20170098822
    Abstract: The present invention provides an electrode mixture layer for nonaqueous electrolyte secondary batteries, which contains an electrode active material, a carbon-based conductive agent containing fibrous carbon having an average effective length of 10 ?m, and a binder, and which has a thickness of 50 ?m or more. This electrode mixture layer has an inner layer portion where the fibrous carbon is three-dimensionally dispersed in a random manner.
    Type: Application
    Filed: March 26, 2015
    Publication date: April 6, 2017
    Applicant: TEIJIN LIMITED
    Inventors: Kazuki YACHI, Shinya KOMURA, Ryota HIRAKAWA, Takahiro DAIDO, Takashi SHIRO
  • Publication number: 20150372309
    Abstract: The purpose of the present invention is to provide an electrode active material layer exhibiting excellent mechanical strength. This electrode material for a non-aqueous electrolyte secondary battery includes at least an electrode active material, a carbon-based conductive auxiliary agent, and a binder. The carbon-based conductive auxiliary agent has a linear structure, and includes ultra-fine fibrous carbon having an average fibre diameter of more than 200 nm but not more than 900 nm. The electrode material configures an electrode active material layer in which the maximum tensile strength (?M) in a planar direction and the tensile strength (?T) in an in-plane direction orthogonal to the maximum tensile strength (?M) satisfy relational expression (a), namely ?M/?T?1.6.
    Type: Application
    Filed: January 24, 2014
    Publication date: December 24, 2015
    Applicant: TEIJIN LIMITED
    Inventors: Kazuki YACHI, Shinya KOMURA, Asami KANEMATSU, Takahiro DAIDO