Patents by Inventor Yuu Takanashi

Yuu Takanashi 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: 20230014664
    Abstract: The present nonaqueous electrolyte secondary battery positive electrode comprises a positive electrode core, and a positive electrode composite material layer formed on the surface of the positive electrode core. The positive electrode composite material layer includes at least a positive electrode active material, and lithium phosphate. The positive electrode active material includes a first positive electrode active material wherein the Ni content relative to the total molar amount of metal elements other than Li is 50-65 mol%, and a second positive electrode active material wherein the Ni content relative to the total molar amount of metal elements other than Li is 45 mol% or less. The ratio of the first positive electrode active material to the second positive electrode active material in the positive electrode composite material layer is, by mass ratio, from 80:20 to 50:50.
    Type: Application
    Filed: December 8, 2020
    Publication date: January 19, 2023
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Takatoshi Higuchi, Yuu Takanashi
  • Patent number: 10892467
    Abstract: A nonaqueous electrolyte secondary battery includes an electrode assembly including a negative plate and a positive plate including a positive electrode active material mix layer, a nonaqueous electrolyte, a battery case that houses the electrode assembly and the nonaqueous electrolyte, and a pressure-sensitive safety system that operates when the pressure in the battery case reaches a value greater than or equal to a predetermined value. The positive electrode active material mix layer contains lithium carbonate and lithium phosphate. The average particle size of lithium carbonate contained in the positive electrode active material mix layer is greater than the average particle size of lithium phosphate contained in the positive electrode active material mix layer. The number of particles of lithium carbonate contained in the positive electrode active material mix layer is less than the number of particles of lithium phosphate contained in the positive electrode active material mix layer.
    Type: Grant
    Filed: June 29, 2018
    Date of Patent: January 12, 2021
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Yuu Takanashi, Masao Inoue, Toyoki Fujihara
  • Publication number: 20200194781
    Abstract: A secondary battery includes a positive electrode including a positive electrode core; and a positive electrode mixture layer formed on at least one of the surfaces of the positive electrode core. The positive electrode mixture layer has a first positive electrode mixture layer and a second positive electrode mixture layer formed om the surface of the first positive electrode mixture layer. The first positive electrode mixture layer contains a first positive electrode active material having a BET specific surface area of 1.6 m2/g to 2.8 m2/g, and the second positive electrode mixture layer contains a second positive electrode active material having a BET specific surface area of 0.8 m2/g to 1.3 m2/g. The thickness of the second positive electrode mixture layer is 5 ?m to 15 ?m.
    Type: Application
    Filed: December 5, 2019
    Publication date: June 18, 2020
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Akihiro Tabushi, Kazuya Hashimoto, Yuu Takanashi
  • Patent number: 10340525
    Abstract: A non-aqueous electrolyte secondary battery positive electrode capable of suppressing a decomposition reaction of an electrolyte solution in an overcharged state is provided. A non-aqueous electrolyte secondary battery positive electrode according to this embodiment includes a positive electrode active material layer which includes a positive electrode active material (54) containing a lithium transition metal oxide, a tungsten compound (56), a phosphoric acid compound (58) not in contact with the positive electrode active material (54), and an electrically conductive agent (52) in contact with the tungsten compound (56) and the phosphoric acid compound (58).
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: July 2, 2019
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Yuu Takanashi, Fumiharu Niina, Atsushi Fukui, Takahiro Isono
  • Publication number: 20190013508
    Abstract: A nonaqueous electrolyte secondary battery includes an electrode assembly including a negative plate and a positive plate including a positive electrode active material mix layer, a nonaqueous electrolyte, a battery case that houses the electrode assembly and the nonaqueous electrolyte, and a pressure-sensitive safety system that operates when the pressure in the battery case reaches a value greater than or equal to a predetermined value. The positive electrode active material mix layer contains lithium carbonate and lithium phosphate. The average particle size of lithium carbonate contained in the positive electrode active material mix layer is greater than the average particle size of lithium phosphate contained in the positive electrode active material mix layer. The number of particles of lithium carbonate contained in the positive electrode active material mix layer is less than the number of particles of lithium phosphate contained in the positive electrode active material mix layer.
    Type: Application
    Filed: June 29, 2018
    Publication date: January 10, 2019
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Yuu Takanashi, Masao Inoue, Toyoki Fujihara
  • Patent number: 9923244
    Abstract: Provided is a nonaqueous electrolyte secondary battery in which the structural change of a positive electrode active material is suppressed at high voltage and which can achieve high capacity and long life. The nonaqueous electrolyte secondary battery includes a positive electrode containing a positive electrode active material storing and releasing lithium ions, a negative electrode containing a negative electrode active material storing and releasing lithium ions, and a nonaqueous electrolyte. The positive electrode active material is a cobalt composite oxide which has a layered rock salt structure and which includes a lithium layer containing magnesium, magnesium is present in the lithium layer after charge is performed at a potential of 4.53 V or more versus lithium, and 4.5 mole percent to 10 mole percent of a magnesium-containing compound is present on the negative electrode with respect to magnesium in the positive electrode.
    Type: Grant
    Filed: March 2, 2015
    Date of Patent: March 20, 2018
    Assignee: SANYO ELECTRIC CO., LTD.
    Inventors: Yuu Takanashi, Atsushi Fukui, Kazuhiro Hasegawa, Sho Tsuruta
  • Patent number: 9876222
    Abstract: A nonaqueous electrolyte secondary battery which can suppress the change in structure of a positive electrode active material at a high voltage is provided. The nonaqueous electrolyte secondary battery has a positive electrode including a positive electrode active material which absorbs and releases lithium ions; a negative electrode including a negative electrode active material which absorbs and releases lithium ions; and a nonaqueous electrolyte. The positive electrode active material has a surface to which a rare earth compound is adhered and includes a lithium cobalt composite oxide containing at least one type selected from the group consisting of Ni, Mn, Ca, Cu, Zn, Sr, Ge, Sn, Si, P, Nb, Mo, S, and W, and charge is performed so that the potential of the positive electrode is 4.53 V or more with reference to lithium.
    Type: Grant
    Filed: September 10, 2013
    Date of Patent: January 23, 2018
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Yuu Takanashi, Kazuhiro Hasegawa, Sho Tsuruta, Atsushi Fukui
  • Publication number: 20180019473
    Abstract: A non-aqueous electrolyte secondary battery positive electrode capable of suppressing a decomposition reaction of an electrolyte solution in an overcharged state is provided. A non-aqueous electrolyte secondary battery positive electrode according to this embodiment includes a positive electrode active material layer which includes a positive electrode active material (54) containing a lithium transition metal oxide, a tungsten compound (56), a phosphoric acid compound (58) not in contact with the positive electrode active material (54), and an electrically conductive agent (52) in contact with the tungsten compound (56) and the phosphoric acid compound (58).
    Type: Application
    Filed: January 21, 2016
    Publication date: January 18, 2018
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Yuu Takanashi, Fumiharu Niina, Atsushi Fukui, Takahiro Isono
  • Publication number: 20170062801
    Abstract: A non-aqueous electrolyte secondary battery having a high capacity and a long life is provided by eliminating or reducing the structural change of a positive electrode active material at high voltages. The non-aqueous electrolyte secondary battery includes a positive electrode having a positive electrode active material that intercalates and deintercalates lithium ions, a negative electrode having a negative electrode active material that intercalates and deintercalates lithium ions, and a non-aqueous electrolyte. The positive electrode active material includes a lithium-cobalt composite oxide containing nickel, manganese, aluminum, and germanium. The percentage of cobalt in the lithium-cobalt composite oxide is 80 mol % or more with respect the total molar amount of metal elements except lithium.
    Type: Application
    Filed: December 19, 2014
    Publication date: March 2, 2017
    Applicants: Sanyo Electric Co., Ltd., Sanyo Electric Co., Ltd.
    Inventors: Yuu Takanashi, Sho Tsuruta, Atsushi Fukui, Kazuhiro Hasegawa
  • Publication number: 20170018808
    Abstract: Provided is a nonaqueous electrolyte secondary battery in which the structural change of a positive electrode active material is suppressed at high voltage and which can achieve high capacity and long life. The nonaqueous electrolyte secondary battery includes a positive electrode containing a positive electrode active material storing and releasing lithium ions, a negative electrode containing a negative electrode active material storing and releasing lithium ions, and a nonaqueous electrolyte. The positive electrode active material is a cobalt composite oxide which has a layered rock salt structure and which includes a lithium layer containing magnesium, magnesium is present in the lithium layer after charge is performed at a potential of 4.53 V or more versus lithium, and 4.5 mole percent to 10 mole percent of a magnesium-containing compound is present on the negative electrode with respect to magnesium in the positive electrode.
    Type: Application
    Filed: March 2, 2015
    Publication date: January 19, 2017
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Yuu TAKANASHI, Atsushi FUKUI, Kazuhiro HASEGAWA, Sho TSURUTA
  • Publication number: 20160351887
    Abstract: Provided is a nonaqueous electrolyte secondary battery which is capable of achieving high capacity and long life by suppressing the structural change of a positive electrode active material at high voltage. The nonaqueous electrolyte secondary battery includes a positive electrode containing a positive electrode active material storing and releasing lithium ions, a negative electrode containing a negative electrode active material storing and releasing lithium ions, and a nonaqueous electrolyte. The positive electrode active material is a lithium-cobalt composite oxide containing nickel, manganese, and aluminium and has a rare-earth compound or oxide deposited to a portion of the surface thereof.
    Type: Application
    Filed: January 27, 2015
    Publication date: December 1, 2016
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Yuu Takanashi, Kazuhiro Hasegawa, Sho Tsuruta, Atsushi Fukui
  • Publication number: 20150270533
    Abstract: A nonaqueous electrolyte secondary battery which can suppress the change in structure of a positive electrode active material at a high voltage is provided. The nonaqueous electrolyte secondary battery has a positive electrode including a positive electrode active material which absorbs and releases lithium ions; a negative electrode including a negative electrode active material which absorbs and releases lithium ions; and a nonaqueous electrolyte. The positive electrode active material has a surface to which a rare earth compound is adhered and includes a lithium cobalt composite oxide containing at least one type selected from the group consisting of Ni, Mn, Ca, Cu, Zn, Sr, Ge, Sn, Si, P, Nb, Mo, S, and W, and charge is performed so that the potential of the positive electrode is 4.53 V or more with reference to lithium.
    Type: Application
    Filed: September 10, 2013
    Publication date: September 24, 2015
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Yuu Takanashi, Kazuhiro Hasegawa, Sho Tsuruta, Atsushi Fukui
  • Publication number: 20110129735
    Abstract: A method of manufacturing an active material for a non-aqueous electrolyte battery, the active material containing a lithium-containing vanadium oxide, is provided. The active material for a non-aqueous electrolyte battery is washed with water or an acidic aqueous solution. By dissolving pentavalent vanadium, which is toxic, in water or an acidic aqueous solution, the pentavalent vanadium can be removed from the active material.
    Type: Application
    Filed: November 30, 2010
    Publication date: June 2, 2011
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Mai Yokoi, Yuu Takanashi, Masahide Miyake, Yasuyuki Kusumoto, Shigeki Matsuta, Shinnosuke Ichikawa