Patents by Inventor Katsutoshi Kurihara

Katsutoshi Kurihara 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).

  • Positive electrode active material including a lithium transition metal complex oxide and an oxide of a dissimilar element
    Patent number: 7767342
    Abstract: A non-aqueous electrolyte secondary battery that can restrict lowering of battery performance during battery preservation is provided. A negative electrode that a negative electrode mixture including graphite is applied on a rolled copper foil and a positive electrode that a positive electrode mixture including lithium manganate is applied on an aluminum foil are used. An oxide in which one element selected from Al, Si, Ti, V, Cr, Fe, Ni, Cu, Zn, Zr, Mo, W, Pb and dissimilar to elements constituting the lithium manganate is oxidized is intermixed with the lithium manganate. An intermixture amount of the oxide is set such that a molar number of the dissimilar element contained in one gram of the positive electrode active material to a molar number of lithium contained in one gram of the positive electrode active material is not more than 5/1000. Charge transfer is restricted by the oxide during battery preservation.
    Type: Grant
    Filed: August 30, 2005
    Date of Patent: August 3, 2010
    Assignee: Shin-Kobe Electric Machinery Co., Ltd.
    Inventors: Kenji Nakai, Katsutoshi Kurihara, Yoshimasa Koishikawa, Kenji Hara, Syouji Hirahata
  • Positive electrode active material, non-aqueous electrolyte secondary battery and method for manufacturing positive electrode active material
    Publication number: 20060046143
    Abstract: A non-aqueous electrolyte secondary battery that can restrict lowering of battery performance during battery preservation is provided. A negative electrode that a negative electrode mixture including graphite is applied on a rolled copper foil and a positive electrode that a positive electrode mixture including lithium manganate is applied on an aluminum foil are used. An oxide in which one element selected from Al, Si, Ti, V, Cr, Fe, Ni, Cu, Zn, Zr, Mo, W, Pb and dissimilar to elements constituting the lithium manganate is oxidized is intermixed with the lithium manganate. An intermixture amount of the oxide is set such that a molar number of the dissimilar element contained in one gram of the positive electrode active material to a molar number of lithium contained in one gram of the positive electrode active material is not more than 5/1000. Charge transfer is restricted by the oxide during battery preservation.
    Type: Application
    Filed: August 30, 2005
    Publication date: March 2, 2006
    Applicant: Shin-Kobe Electric Machinery Co., Ltd.
    Inventors: Kenji Nakai, Katsutoshi Kurihara, Yoshimasa Koishikawa, Kenji Hara, Syouji Hirahata