Patents by Inventor Ryuta SUGIURA

Ryuta SUGIURA 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: 11108040
    Abstract: One aspect of the invention provides a positive electrode material for a secondary battery including a positive electrode active material and a coating layer. The coating layer includes an ionic crystalline p-type semiconductor material and an ionic crystalline n-type semiconductor material which are both disposed on a surface of the positive electrode active material.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: August 31, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masaki Adachi, Ryuta Sugiura, Yuji Yamamoto
  • 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
  • Patent number: 10971720
    Abstract: A positive electrode active material includes secondary particles. The secondary particles include a plurality of primary particles. The primary particles include a lithium-containing composite metal oxide. Inside the secondary particles, an electron conducting oxide is disposed at at least a part of a grain boundary between the primary particles. The electron conducting oxide has a perovskite structure.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: April 6, 2021
    Assignees: Toyota Jidosha Kabushiki Kaisha, Sumitomo Metal Mining Co., Ltd.
    Inventors: Ryuta Sugiura, Satoshi Kanada, Tetsutaro Hayashi, Taira Aida
  • Patent number: 10950851
    Abstract: One aspect of the present invention provides an electrode having a collector and an electrode mix layer disposed on the collector. The electrode mix layer contains an active material A having a core portion A and a coat material A, and an active material B having a core portion B and a coat material B. The isoelectric point of the coat material A is 7 or lower. The isoelectric point of the coat material B is 7 or higher. The isoelectric point of at least one of the coat material A and the coat material B is not 7.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: March 16, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuji Yamamoto, Ryuta Sugiura
  • 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
  • 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: 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
  • Patent number: 10770724
    Abstract: Provided is a positive electrode material that allows reducing the resistance of a lithium secondary battery. The positive electrode material for lithium secondary batteries disclosed herein contains positive electrode active material particles each having a layered structure; and at least one conductor selected from the group consisting of a lithium conductor and an electronic conductor, and disposed on a surface of the positive electrode active material particles. In a case where the positive electrode material contains the lithium conductor, the proportion of the lithium conductor disposed at planes other than the (003) plane of the positive electrode active material particle, with respect to the total amount of the lithium conductor, is not less than 50% and not more than 100%.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: September 8, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Ryuta Sugiura
  • Patent number: 10714725
    Abstract: Provided is a separator that is used in a nonaqueous electrolyte secondary battery, and that exhibits high impregnation ability with respect to a nonaqueous electrolyte solution. The separator for a nonaqueous electrolyte secondary battery disclosed herein is provided with: a porous substrate; a first coat layer formed on a pair of main surfaces and on an inner surface of the porous substrate; and a second coat layer formed on the first coat layer, at least on one main surface of the porous substrate. The first coat layer has higher hydrophilicity than the porous substrate. The second coat layer has higher hydrophobicity than the porous substrate. The hydrophilicity of an inner surface of the separator for a nonaqueous electrolyte secondary battery is higher than the hydrophilicity of the second coat layer, in a central region of the separator for a nonaqueous electrolyte secondary battery in the thickness direction thereof.
    Type: Grant
    Filed: August 30, 2018
    Date of Patent: July 14, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuji Yamamoto, Ryuta Sugiura
  • Patent number: 10680279
    Abstract: The present invention provides an art that can improve further battery performance of lithium ion secondary batteries in which a lithium salt is added to the interior of the batteries. A herein disclosed lithium ion secondary battery electrode is constituted by disposing, on a surface of a foil-like electrode current collector, an electrode mixture layer that contains a particulate electrode active material. With this electrode, a lithium salt having a lithium ion intake capability is added to the electrode mixture layer; dividing the electrode mixture layer into three equal regions, which are a first region, a second region, and a third region, in a thickness direction, an amount of the lithium salt component in the first region and an amount of the lithium salt component in the third region satisfy the relationship 0<S3/S1?4; and a maximum particle diameter of aggregates of the lithium salt present in the electrode mixture layer is less than 1 ?m.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: June 9, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuji Yamamoto, Ryuta Sugiura
  • 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: 20200067084
    Abstract: The positive electrode active material disclosed herein includes a base portion including a lithium transition metal complex oxide having a layered crystal structure, and a coating portion including an electroconductive oxide having a layered crystal structure. A smaller angle ? formed by a stacking plane direction of the lithium transition metal complex oxide and a stacking plane direction of the electroconductive oxide satisfies the following conditions: an average angle ?ave. obtained by arithmetically averaging the angle ? satisfies 0°??ave.?60°; and a ratio of points in which the angle ? is greater than 60° is 39% or less.
    Type: Application
    Filed: October 29, 2019
    Publication date: February 27, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Ryuta SUGIURA
  • 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: 20190372090
    Abstract: Provided is a positive electrode material that allows reducing battery resistance. The positive electrode material disclosed herein has particles of a positive electrode active material, each having a void communicating between the surface and at least the interior; and an electronic conductor present on the surface of the particles of the positive electrode active material. The positive electrode active material has a layered rock salt structure, and has a composition represented by Formula (I) below. The electronic conductor has a composition represented by Formula (II) below, Li1+uNixMnyCozMtO2??(I) La1?pMapCo1?qMbqO3????(II) wherein the symbols in the formulas are as defined in the specification.
    Type: Application
    Filed: May 13, 2019
    Publication date: December 5, 2019
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, SUMITOMO METAL MINING CO., LTD.
    Inventors: Ryuta SUGIURA, Taira AIDA, Tetsutaro HAYASHI, Satoshi KANADA
  • Publication number: 20190372119
    Abstract: A positive electrode active material for a non-aqueous electrolyte secondary battery that can improve the output characteristics without deteriorating its battery capacity and cycling characteristics. The positive electrode active material comprises a lithium transition metal-containing composite oxide comprising secondary particles that are constructed by an aggregation of a plurality of primary particles. The secondary particles comprise an outer shell section where the primary particles are aggregated, a center section constructed by an inner space existing inside the outer shell section, and at least one through-hole formed in the outer shell section and communicating the center section and outside, and the ratio of the inner diameter of the through-hole with respect to the thickness of the outer shell section is 0.3 or more.
    Type: Application
    Filed: November 22, 2017
    Publication date: December 5, 2019
    Inventors: Takahiro TOMA, Taira AIDA, Tetsufumi KOMUKAI, Ryuta SUGIURA
  • Publication number: 20190326590
    Abstract: One aspect of the present invention provides an electrode having a collector and an electrode mix layer disposed on the collector. The electrode mix layer contains an active material A having a core portion A and a coat material A, and an active material B having a core portion B and a coat material B. The isoelectric point of the coat material A is 7 or lower. The isoelectric point of the coat material B is 7 or higher. The isoelectric point of at least one of the coat material A and the coat material B is not 7.
    Type: Application
    Filed: March 29, 2019
    Publication date: October 24, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuji YAMAMOTO, Ryuta SUGIURA
  • Publication number: 20190296338
    Abstract: One aspect of the invention provides a positive electrode material for a secondary battery including a positive electrode active material and a coating layer. The coating layer includes an ionic crystalline p-type semiconductor material and an ionic crystalline n-type semiconductor material which are both disposed on a surface of the positive electrode active material.
    Type: Application
    Filed: March 15, 2019
    Publication date: September 26, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masaki ADACHI, Ryuta SUGIURA, Yuji YAMAMOTO