Patents by Inventor Taiki Satow

Taiki Satow 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: 10128495
    Abstract: A positive electrode for a nonaqueous electrolyte secondary battery that does not undergo a decrease in discharge capacity in low-temperature discharge during charge and discharge after the battery is left standing at high temperature in a charged state, for example. The positive electrode for a nonaqueous electrolyte secondary battery includes a positive electrode active material. The positive electrode active material includes a mixture of lithium nickel cobalt manganate and lithium cobaltate having a compound adhered to part of a surface thereof, the compound containing fluorine and at least one selected from zirconium, magnesium, titanium, aluminum, and a rare earth element; and a ratio of the lithium nickel cobalt manganate relative to a total amount of the positive electrode active material is 1% by mass or more and less than 70% by mass.
    Type: Grant
    Filed: January 23, 2014
    Date of Patent: November 13, 2018
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Taiki Satow, Takao Kokubu, Taizou Sunano, Takeshi Ogasawara
  • Patent number: 9627682
    Abstract: A negative electrode for nonaqueous electrolyte secondary batteries includes a negative electrode core member and a negative electrode mixture layer attached to the negative electrode core member, wherein the negative electrode mixture layer contains negative electrode active material particles with a graphite structure and a binder, the mixture density of the negative electrode mixture layer is 1.5 g/cm3 to 1.8 g/cm3, the ratio I(002)/I(110) of the diffraction intensity I(002) of the (002) plane to the diffraction intensity I(110) of the (110) plane satisfies 60?I(002)/I(110)?120 as determined by measuring the negative electrode mixture layer by an X-ray diffraction method, the amount of particles with a size of 1 ?m to 10 ?m in the particle size distribution of a crushed product of the negative electrode mixture layer is 12% to 25% by volume.
    Type: Grant
    Filed: December 24, 2013
    Date of Patent: April 18, 2017
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Taiki Satow, Masaki Deguchi, Kentaro Takahashi, Masaya Ugaji
  • Publication number: 20170018772
    Abstract: Dissolution of cobalt from a positive electrode active material is suppressed. Disclosed is a positive electrode active material for a nonaqueous electrolyte secondary battery that contains a lithium transition metal oxide. Fluorine and at least one element selected from zirconium, titanium, aluminum, magnesium, and rare earth elements adhere to the surface of the lithium transition metal oxide, and the lithium transition metal oxide contains cobalt. The lithium transition metal oxide has an average particle diameter of 10 ?m or less.
    Type: Application
    Filed: March 5, 2015
    Publication date: January 19, 2017
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Taiki Satow, Takeshi Ogasawara, Taizou Sunano
  • Patent number: 9362550
    Abstract: Provided is a negative electrode for lithium ion secondary batteries, which can enhance the penetration of non-aqueous electrolyte, and can improve the input-output characteristics. The negative electrode includes a negative electrode core material sheet, and a negative electrode material mixture layer supported thereon. The negative electrode material mixture layer includes negative electrode active material particles, and a binder. The negative electrode material mixture layer has a plurality of pores interspersed on the surface and in the interior of the negative electrode material mixture layer. The pores have an average maximum diameter R of 45 to 125 ?m. The pores have a number density of 8 to 17 pores per 1 cm2 of the surface of the negative electrode material mixture layer or per 1 cm2 of a cross section in the plane direction of the negative electrode material mixture layer.
    Type: Grant
    Filed: November 22, 2012
    Date of Patent: June 7, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Taiki Satow, Shinji Kasamatsu, Masaya Ugaji
  • Publication number: 20160013478
    Abstract: A positive electrode for a nonaqueous electrolyte secondary battery that does not undergo a decrease in discharge capacity in low-temperature discharge during charge and discharge after the battery is left standing at high temperature in a charged state, for example. The positive electrode for a nonaqueous electrolyte secondary battery includes a positive electrode active material. The positive electrode active material includes a mixture of lithium nickel cobalt manganate and lithium cobaltate having a compound adhered to part of a surface thereof, the compound containing fluorine and at least one selected from zirconium, magnesium, titanium, aluminum, and a rare earth element; and a ratio of the lithium nickel cobalt manganate relative to a total amount of the positive electrode active material is 1% by mass or more and less than 70% by mass.
    Type: Application
    Filed: January 23, 2014
    Publication date: January 14, 2016
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Taiki Satow, Takao Kokubu, Taizou Sunano, Takeshi Ogasawara
  • Publication number: 20150318545
    Abstract: A negative electrode for nonaqueous electrolyte secondary batteries includes a negative electrode core member and a negative electrode mixture layer attached to the negative electrode core member, wherein the negative electrode mixture layer contains negative electrode active material particles with a graphite structure and a binder, the mixture density of the negative electrode mixture layer is 1.5 g/cm3 to 1.8 g/cm3, the ratio I(002)/I(110) of the diffraction intensity 1(002) of the (002) plane to the diffraction intensity I(110) of the (110) plane satisfies 60?I(002)/I(110)?120 as determined by measuring the negative electrode mixture layer by an X-ray diffraction method, the amount of particles with a size of 1 ?m to 10 ?m in the particle size distribution of a crushed product of the negative electrode mixture layer is 12% to 25% by volume.
    Type: Application
    Filed: December 24, 2013
    Publication date: November 5, 2015
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Taiki Satow, Masaki Deguchi, Kentaro Takahashi, Masaya Ugaji
  • Publication number: 20140308582
    Abstract: Provided is a negative electrode for lithium ion secondary batteries, which can enhance the penetration of non-aqueous electrolyte, and can improve the input-output characteristics. The negative electrode includes a negative electrode core material sheet, and a negative electrode material mixture layer supported thereon. The negative electrode material mixture layer includes negative electrode active material particles, and a binder. The negative electrode material mixture layer has a plurality of pores interspersed on the surface and in the interior of the negative electrode material mixture layer. The pores have an average maximum diameter R of 45 to 125 ?m. The pores have a number density of 8 to 17 pores per 1 cm2 of the surface of the negative electrode material mixture layer or per 1 cm2 of a cross section in the plane direction of the negative electrode material mixture layer.
    Type: Application
    Filed: November 22, 2012
    Publication date: October 16, 2014
    Inventors: Taiki Satow, Shinji Kasamatsu, Masaya Ugaji
  • Patent number: 8728665
    Abstract: A negative electrode for a lithium ion secondary battery includes a negative electrode core member and a negative electrode mixture layer adhering to the negative electrode core member. The negative electrode mixture layer includes active material particles, a cellulose ether compound, and rubber particles. The cellulose ether compound has a degree of etherification of 0.25 or more and 0.7 or less and an average degree of polymerization of 20 or more and 1200 or less. The negative electrode mixture layer contains remaining particles including a water-insoluble portion of the cellulose ether compound and having a mean particle size of 1 ?m or more and 75 ?m or less. The bonding strength between the active material particles is 98 N/cm2 or more.
    Type: Grant
    Filed: March 9, 2011
    Date of Patent: May 20, 2014
    Assignee: Panasonic Corporation
    Inventors: Taiki Satow, Shinji Kasamatsu, Nobuhiro Hirano, Masaya Ugaji
  • Publication number: 20120064415
    Abstract: A negative electrode for a lithium ion secondary battery includes a negative electrode core member and a negative electrode mixture layer adhering to the negative electrode core member. The negative electrode mixture layer includes active material particles, a cellulose ether compound, and rubber particles. The cellulose ether compound has a degree of etherification of 0.25 or more and 0.7 or less and an average degree of polymerization of 20 or more and 1200 or less. The negative electrode mixture layer contains remaining particles including a water-insoluble portion of the cellulose ether compound and having a mean particle size of 1 ?m or more and 75 ?m or less. The bonding strength between the active material particles is 98 N/cm2 or more.
    Type: Application
    Filed: March 9, 2011
    Publication date: March 15, 2012
    Inventors: Taiki Satow, Shinji Kasamatsu, Nobuhiro Hirano, Masaya Ugaji