Patents by Inventor Masato Hozumi

Masato Hozumi 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: 9034526
    Abstract: A garnet-type solid electrolyte contains a crystal having (110) face, (1-10) face, (112) face, (1-12) face, and (11-2) face, the garnet-type solid electrolyte being Li7La3Zr2O12. A battery includes a solid electrolyte interposed between a positive and a negative electrode, the solid electrolyte being the garnet-type solid electrolyte. A method of producing a garnet-type solid electrolyte represented by a composition formula Li7La3Zr2O12 and has (110) face, (1-10) face, (112) face, (1-12) face, and (11-2) face as a crystal face, including a step of preparing a lithium-containing compound, a lanthanum-containing compound, and a zirconium-containing compound; a step of mixing these compounds such that a molar ratio among the elements satisfies Li:La:Zr=a:b:c (where a is from 120 to 160, b is from 1 to 5, and c is from 1 to 5); and a step of heating the mixture between 400 and 1,200° C.
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: May 19, 2015
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, SHINSHU UNIVERSITY
    Inventors: Katsuya Teshima, Masato Hozumi
  • Publication number: 20140038055
    Abstract: In a (001) pole figure of the active material particles, where a plane parallel to the substrate is defined as the equatorial plane, a Lotgering factor fa(001) of an A plane and a Lotgering factor fh(001) of a B plane satisfy both Expressions (1) and (2) below, the A plane being an equatorial cross section perpendicular to a line that connects the center of the (001) pole figure and a first point of maximum XRD intensity of peaks attributed to (001) planes at the outer periphery of the equatorial plane, the B plane being an equatorial cross section perpendicular to a line that connects the center of the (001) pole figure and a second point of minimum XRD intensity of peaks attributed to the (001) planes at the outer periphery of the equatorial plane: fa(001)>0.3 ??Expression (1) fa(001)?fb(001)<1.0 ??Expression (2).
    Type: Application
    Filed: August 1, 2013
    Publication date: February 6, 2014
    Applicants: NATIONAL INSTITUTE FOR MATERIALS SCIENCE, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masato HOZUMI, Toshiya SAITO, Hideto YAMADA, Tohru SUZUKI, Tetsuo UCHIKOSHI, Yoshio SAKKA
  • Publication number: 20140038054
    Abstract: An all-solid-state battery has a mixed electrode layer in which a positive electrode active material and a negative electrode active material are present in a dispersed state. A solid electrolyte section that contains at least one element that makes up the positive electrode active material and at least one element that makes up the negative electrode active material is formed at an interface between the positive electrode active material and the negative electrode active material. The solid electrolyte section is not formed at interfaces between the positive electrode active material portions and at interfaces between the negative electrode active material portions. The positive electrode active material and the negative electrode active material are in the form of predetermined combinations.
    Type: Application
    Filed: July 22, 2013
    Publication date: February 6, 2014
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takeshi TOJIGAMORI, Chihiro YADA, Masato HOZUMI
  • Publication number: 20130323604
    Abstract: A garnet-type solid electrolyte contains a crystal having (110) face, (1-10) face, (112) face, (1-12) face, and (11-2) face, the garnet-type solid electrolyte being Li7La3Zr2O12. A battery includes a solid electrolyte interposed between a positive and a negative electrode, the solid electrolyte being the garnet-type solid electrolyte. A method of producing a garnet-type solid electrolyte represented by a composition formula Li7La3Zr2O12 and has (110) face, (1-10) face, (112) face, (1-12) face, and (11-2) face as a crystal face, including a step of preparing a lithium-containing compound, a lanthanum-containing compound, and a zirconium-containing compound; a step of mixing these compounds such that a molar ratio among the elements satisfies Li:La:Zr=a:b:c (where a is from 120 to 160, b is from 1 to 5, and c is from 1 to 5); and a step of heating the mixture between 400 and 1,200° C.
    Type: Application
    Filed: February 23, 2012
    Publication date: December 5, 2013
    Applicants: SHINSHU UNIVERSITY, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Katsuya Teshima, Masato Hozumi
  • Patent number: 8518584
    Abstract: A production method for an electrode for a battery includes preparing a conductive substrate, and electrode material particles having ion conduction anisotropy; and producing an electrode by attaching the electrode material particles onto the conductive substrate, and applying a magnetic field in a predetermined direction.
    Type: Grant
    Filed: February 3, 2011
    Date of Patent: August 27, 2013
    Assignees: Toyota Jidosha Kabushiki Kaisha, National Institute for Materials Science
    Inventors: Koji Kawamoto, Masato Hozumi, Yoshio Sakka, Tetsuo Uchikoshi, Tohru Suzuki, Hideto Yamada
  • Publication number: 20110195310
    Abstract: A production method for an electrode for a battery includes preparing a conductive substrate, and electrode material particles having ion conduction anisotropy; and producing an electrode by attaching the electrode material particles onto the conductive substrate, and applying a magnetic field in a predetermined direction.
    Type: Application
    Filed: February 3, 2011
    Publication date: August 11, 2011
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Koji KAWAMOTO, Masato HOZUMI, Yoshio SAKKA, Tetsuo UCHIKOSHI, Tohru SUZUKI, Hideto YAMADA