Patents by Inventor Daisuke Horikawa

Daisuke Horikawa 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: 11108042
    Abstract: A positive electrode composite material for a lithium ion secondary battery that makes it possible to appropriately reduce the electric resistance in a positive electrode and to realize a high-performance lithium ion secondary battery. The positive electrode composite material to be used in the positive electrode of the lithium ion secondary battery includes a particulate positive electrode active material composed of a lithium composite oxide having a layered crystal structure including at least lithium, and a conductive oxide. Here, a particulate region where primary particles of the conductive oxide are aggregated, and a film-shaped region where the conductive oxide is formed in a film shape adhere to at least a part of the surface of the positive electrode active material. The average particle diameter based on cross-sectional TEM observation of primary particles in the particulate region is equal to or greater than 0.
    Type: Grant
    Filed: February 8, 2018
    Date of Patent: August 31, 2021
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, SUMITOMO METAL MINING CO., LTD.
    Inventors: Daisuke Horikawa, Ryuta Sugiura, Taira Aida, Satoshi Kanada
  • Publication number: 20210257611
    Abstract: A method of manufacturing a positive electrode material for lithium ion secondary battery includes the following (?) and (?): (?) a positive electrode active material is prepared; and (?) the positive electrode material for lithium ion secondary battery is manufactured by forming a coat on at least a portion of a surface of the positive electrode active material. The coat is formed to satisfy the following (1) to (3): (1) the coat includes a lithium ion conductor and a ferroelectric substance; (2) the ferroelectric substance is dispersed in the lithium ion conductor; and (3) the lithium ion conductor is interposed at least partially between the positive electrode active material and the ferroelectric substance.
    Type: Application
    Filed: April 30, 2021
    Publication date: August 19, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Daisuke HORIKAWA, Ryuta SUGIURA
  • Patent number: 11018335
    Abstract: A positive electrode for a lithium ion secondary battery includes a positive electrode composite material layer. The positive electrode composite material layer includes composite particles and electron conductive particles. The composite particles include positive electrode active material particles and a coating film. The coating film is formed on the surface of the positive electrode active material particles. The coating film contains a first electron conductive oxide. The electron conductive particles are dispersed in the positive electrode composite material layer. The electron conductive particles contain a second electron conductive oxide. Each of the first electron conductive oxide and the second electron conductive oxide has a perovskite structure.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: May 25, 2021
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, SUMITOMO METAL MINING CO., LTD.
    Inventors: Daisuke Horikawa, Ryuta Sugiura, Satoshi Kanada, Tetsutaro Hayashi, Taira Aida
  • Publication number: 20210005888
    Abstract: A non-aqueous electrolyte secondary battery disclosed herein includes a positive electrode containing a positive electrode active material, a negative electrode, and a non-aqueous electrolyte, and the positive electrode active material includes a positive electrode active material particle containing a lithium transition metal compound, and a coating portion coating at least a part of a surface of the positive electrode active material particle. The coating portion contains a lithium ionic conductor containing lithium, a phosphoric acid group, and at least one element of lanthanum (La) and cerium (Ce).
    Type: Application
    Filed: July 2, 2020
    Publication date: January 7, 2021
    Inventors: Ryuta SUGIURA, Daisuke HORIKAWA, Sadahiro YAGISHITA, Taku NISHIKAWA
  • Publication number: 20210005880
    Abstract: A non aqueous electrolyte secondary battery includes a positive electrode containing a positive electrode active material, a negative electrode, and a non aqueous electrolyte, and the positive electrode active material includes a positive electrode active material particle containing a lithium transition metal compound, and a coating portion coating at least a part of a surface of the positive electrode active material particle. The coating portion contains a lithium ionic conductor containing lithium, a phosphoric acid group, and yttrium. The lithium ionic conductor includes a region A in which a ratio of yttrium is relatively rich and a region B in which the ratio of yttrium is relatively poor.
    Type: Application
    Filed: July 2, 2020
    Publication date: January 7, 2021
    Inventors: Ryuta SUGIURA, Daisuke HORIKAWA, Sadahiro YAGISHITA, Taku NISHIKAWA
  • Publication number: 20210005887
    Abstract: A positive electrode material which is used in a positive electrode of a lithium ion secondary battery disclosed here includes a positive electrode active material including a compound capable of storing and releasing lithium ions, a first coating material disposed on at least a part of the surface of the positive electrode active material, and a second coating material disposed on at least a part of the surface of the positive electrode active material. The positive electrode material is characterized in that the first coating material contains a nickel oxide having a rock salt structure, and the second coating material contains a titanium oxide.
    Type: Application
    Filed: June 10, 2020
    Publication date: January 7, 2021
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, NATIONAL UNIVERSITY CORPORATION OKAYAMA UNIVERSITY
    Inventors: Daisuke HORIKAWA, Yuji YAMAMOTO, Takashi TERANISHI
  • Patent number: 10873089
    Abstract: A positive electrode material for a lithium secondary battery of the present disclosure includes a positive electrode active material, a barium titanate-based dielectric, and at least one of Compound I which contains the element Ba and has the largest peak at a position with 2?=24° to 26° in an X-ray diffraction pattern obtained according to X-ray diffraction measurement using CuK? rays; and Compound II which contains the element Ti and has the largest peak at a position with 2?=26° to 28° in an X-ray diffraction pattern obtained according to X-ray diffraction measurement using CuK? rays. At least one of Compounds I and II is disposed in contact with the dielectric.
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: December 22, 2020
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, NATIONAL UNIVERSITY CORPORATION OKAYAMA UNIVERSITY
    Inventors: Daisuke Horikawa, Ryuta Sugiura, Takashi Teranishi
  • Publication number: 20200388840
    Abstract: Provided is a positive electrode material which can impart a secondary battery with excellent low temperature output characteristics, excellent high temperature cycle characteristics and excellent durability against high voltage. A positive electrode material of a secondary battery disclosed here includes a positive electrode active substance particle and a coating containing a titanium-containing compound at the surface of the positive electrode active substance particle. A layer having a higher Ti concentration than the Ti concentration at a depth of 500 nm from the surface is formed in a surface portion of the positive electrode active substance particle. The titanium-containing compound in the coating is at least one compound selected from the group consisting of TiO2, TinO2n?1, wherein n is an integer of 3 or more, and oxides containing Li and Ti.
    Type: Application
    Filed: June 2, 2020
    Publication date: December 10, 2020
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, NATIONAL UNIVERSITY CORPORATION OKAYAMA UNIVERSITY
    Inventors: Daisuke HORIKAWA, Yuji YAMAMOTO, Takashi TERANISHI
  • Publication number: 20200388835
    Abstract: A positive electrode imparts secondary battery with low temperature output characteristics, high temperature cycle characteristics and durability against high voltage. A positive electrode of secondary battery includes positive electrode current collector and positive electrode active substance layer on positive electrode current collector. The positive electrode active substance layer contains positive electrode active substance particles and oxide particles which are dispersed in positive electrode active substance layer as separate particles from positive electrode active substance particles. The positive electrode active substance particles each include coating of titanium-containing compound at the surface. The titanium-containing compound in coating is at least one compound selected from group consisting of TiO2, TinO2n?1, wherein n is integer of 3 or more, and oxides containing Li and Ti.
    Type: Application
    Filed: May 26, 2020
    Publication date: December 10, 2020
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, NATIONAL UNIVERSITY CORPORATION OKAYAMA UNIVERSITY
    Inventors: Daisuke HORIKAWA, Yuji YAMAMOTO, Takashi TERANISHI
  • Publication number: 20200388821
    Abstract: A method of producing a wet mixture includes a stirring and mixing process in which lithium-containing positive electrode active material particles having surplus lithium compounds on the surface and crystalline ferroelectric ceramic particles are dried, stirred and mixed to obtain a mixed powder; and a solution mixing process in which a lithium conductor forming solution is mixed with the mixed powder to obtain a wet mixture containing coated lithium-containing positive electrode active material particles having a coating which is made of an amorphous lithium conductor and in which the ferroelectric ceramic particles are dispersed on the surface of the lithium-containing positive electrode active material particles.
    Type: Application
    Filed: May 29, 2020
    Publication date: December 10, 2020
    Inventors: Tomohiro YOKOYAMA, Ryuta SUGIURA, Daisuke HORIKAWA
  • Publication number: 20200388834
    Abstract: Provided is a positive electrode material which can impart a lithium secondary battery with excellent low temperature output characteristics, excellent high temperature cycle characteristics and excellent durability against high voltage. A positive electrode material of a lithium secondary battery disclosed here includes a positive electrode active substance particle, a Li-free first coating at the surface of the positive electrode active substance particle, and a Li-containing second coating at the surface of the positive electrode active substance particle. The first coating contains a titanium oxide represented by TiO2 or TinO2n-1, wherein n is an integer of 3 or more. The second coating contains a composite oxide containing Li and Ti, wherein the ratio of the number of atoms of Li relative to the number of atoms of Ti is at least 0.1 and at most 3.
    Type: Application
    Filed: May 26, 2020
    Publication date: December 10, 2020
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, NATIONAL UNIVERSITY CORPORATION OKAYAMA UNIVERSITY
    Inventors: Daisuke HORIKAWA, Yuji YAMAMOTO, Takashi TERANISHI
  • Publication number: 20200243849
    Abstract: A positive electrode active material used for a nonaqueous electrolyte secondary battery, includes a base portion, a dielectric, and a carbonate compound. The base portion is formed of a compound storing and releasing a charge carrier. The dielectric is disposed on at least a part of a surface of the base portion. The carbonate compound is disposed on at least a part of the surface of the base portion.
    Type: Application
    Filed: January 22, 2020
    Publication date: July 30, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Daisuke HORIKAWA
  • Publication number: 20200136152
    Abstract: According to an aspect of the present invention, there is provided a positive electrode material which contains a positive electrode active material, and a dielectric material having a perovskite crystal structure. In the positive electrode material, in an X-ray diffraction pattern (vertical axis: diffraction intensity, horizontal axis: diffraction angle 2? (rad)) obtained by X-ray diffraction measurement using a CuK? ray, a highest intensity peak which is a peak derived from the dielectric material and has the highest intensity is in a range satisfying 2?=31° to 32°, and a half width x of the highest intensity peak satisfies the following expression: 0.22?x?0.33.
    Type: Application
    Filed: September 25, 2019
    Publication date: April 30, 2020
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, NATIONAL UNIVERSITY CORPORATION OKAYAMA UNIVERSITYO
    Inventors: Daisuke HORIKAWA, Ryuta SUGIURA, Takashi TERANISHI
  • Publication number: 20200119345
    Abstract: The positive electrode active material for a secondary cell disclosed herein comprises a base portion including a compound capable of occluding and releasing charge carriers; an electron conductor disposed on at least a part of a surface of the base portion; and a dielectric disposed on at least a part of the surface of the base portion.
    Type: Application
    Filed: October 9, 2019
    Publication date: April 16, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Daisuke HORIKAWA
  • Publication number: 20200058936
    Abstract: A positive electrode composite material for a lithium ion secondary battery that makes it possible to appropriately reduce the electric resistance in a positive electrode and to realize a high-performance lithium ion secondary battery. The positive electrode composite material to be used in the positive electrode of the lithium ion secondary battery includes a particulate positive electrode active material composed of a lithium composite oxide having a layered crystal structure including at least lithium, and a conductive oxide. Here, a particulate region where primary particles of the conductive oxide are aggregated, and a film-shaped region where the conductive oxide is formed in a film shape adhere to at least a part of the surface of the positive electrode active material. The average particle diameter based on cross-sectional TEM observation of primary particles in the particulate region is equal to or greater than 0.
    Type: Application
    Filed: February 8, 2018
    Publication date: February 20, 2020
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, SUMITOMO METAL MINING CO., LTD.
    Inventors: Daisuke HORIKAWA, Ryuta SUGIURA, Taira AIDA, Satoshi KANADA
  • Publication number: 20190181448
    Abstract: The present disclosure relates to a positive electrode material for a lithium secondary battery which includes a positive electrode active material and a dielectric. The dielectric is a composite oxide represented by a general formula AmBnO? and has a dielectric constant of 10 to 500. Here, m and n are real numbers that satisfy 1.01?m/n?1.6, ? is a value that is determined so that charge neutral conditions are satisfied, A is one or more elements among alkali metal elements, alkaline earth metal elements, rare earth elements, Cu, Pb and Bi, and B is one or more elements among transition metal elements and Sn.
    Type: Application
    Filed: December 6, 2018
    Publication date: June 13, 2019
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, NATIONAL UNIVERSITY CORPORATION OKAYAMA UNIVERSITY
    Inventors: Daisuke HORIKAWA, Ryuta SUGIURA, Takashi TERANISHI
  • Publication number: 20190181454
    Abstract: A positive electrode material for a lithium secondary battery of the present disclosure includes a positive electrode active material, a barium titanate-based dielectric, and at least one of Compound I which contains the element Ba and has the largest peak at a position with 2?=24° to 26° in an X-ray diffraction pattern obtained according to X-ray diffraction measurement using CuK? rays; and Compound II which contains the element Ti and has the largest peak at a position with 2?=26° to 28° in an X-ray diffraction pattern obtained according to X-ray diffraction measurement using CuK? rays. At least one of Compounds I and II is disposed in contact with the dielectric.
    Type: Application
    Filed: December 10, 2018
    Publication date: June 13, 2019
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, NATIONAL UNIVERSITY CORPORATION OKAYAMA UNIVERSITY
    Inventors: Daisuke HORIKAWA, Ryuta SUGIURA, Takashi TERANISHI
  • Publication number: 20180316003
    Abstract: A positive electrode for a lithium ion secondary battery includes a positive electrode composite material layer. The positive electrode composite material layer includes composite particles and electron conductive particles. The composite particles include positive electrode active material particles and a coating film. The coating film is formed on the surface of the positive electrode active material particles. The coating film contains a first electron conductive oxide. The electron conductive particles are dispersed in the positive electrode composite material layer. The electron conductive particles contain a second electron conductive oxide. Each of the first electron conductive oxide and the second electron conductive oxide has a perovskite structure.
    Type: Application
    Filed: April 17, 2018
    Publication date: November 1, 2018
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, SUMITOMO METAL MINING CO., LTD.
    Inventors: Daisuke HORIKAWA, Ryuta SUGIURA, Satoshi KANADA, Tetsutaro HAYASHI, Taira AIDA
  • Publication number: 20180254477
    Abstract: A method of manufacturing a positive electrode material for lithium ion secondary battery includes the following (?) and (?): (?) a positive electrode active material is prepared; and (?) the positive electrode material for lithium ion secondary battery is manufactured by forming a coat on at least a portion of a surface of the positive electrode active material. The coat is formed to satisfy the following (1) to (3): (1) the coat includes a lithium ion conductor and a ferroelectric substance; (2) the ferroelectric substance is dispersed in the lithium ion conductor; and (3) the lithium ion conductor is interposed at least partially between the positive electrode active material and the ferroelectric substance.
    Type: Application
    Filed: February 15, 2018
    Publication date: September 6, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Daisuke HORIKAWA, Ryuta SUGIURA
  • Patent number: 9362576
    Abstract: In one embodiment, an electrical power storage system using hydrogen includes a power generation unit generating power using hydrogen and oxidant gas and an electrolysis unit electrolyzing steam. The electrical power storage system includes a hydrogen storage unit storing hydrogen generated by the electrolysis and supplying the hydrogen to the power generation unit during power generation, a high-temperature heat storage unit storing high temperature heat generated accompanying the power generation and supplying the heat to the electrolysis unit during the electrolysis, and a low-temperature heat storage unit storing low-temperature heat, which is exchanged in the high-temperature heat storage unit and generating with this heat the steam supplied to the electrolysis unit.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: June 7, 2016
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Shoko Suyama, Yoshiyasu Ito, Shigeo Kasai, Yasuo Takagi, Tsuneji Kameda, Kentaro Matsunaga, Masato Yoshino, Daisuke Horikawa, Kazuya Yamada