Patents by Inventor Hisao Yamashige

Hisao Yamashige 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).

  • Lithium secondary battery
    Patent number: 9553306
    Abstract: The present invention provides a lithium secondary battery having reduced internal resistance. The lithium secondary battery comprises a positive electrode, a negative electrode, and a non-aqueous electrolyte. The positive electrode comprises, as a positive electrode active material 30, a lithium transition metal composite oxide having a layered structure. In a surface region 82A of a positive electrode active material particle 82, at least one species among elements belonging to groups 3 to 7 of the periodic table is supplemented by ion implantation.
    Type: Grant
    Filed: April 19, 2011
    Date of Patent: January 24, 2017
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Mitsuru Sakano, Hisao Yamashige
  • LITHIUM SECONDARY BATTERY
    Publication number: 20140030598
    Abstract: The present invention provides a lithium secondary battery having reduced internal resistance. The lithium secondary battery comprises a positive electrode, a negative electrode, and a non-aqueous electrolyte. The positive electrode comprises, as a positive electrode active material 30, a lithium transition metal composite oxide having a layered structure. In a surface region 82A of a positive electrode active material particle 82, at least one species among elements belonging to groups 3 to 7 of the periodic table is supplemented by ion implantation.
    Type: Application
    Filed: April 19, 2011
    Publication date: January 30, 2014
    Inventors: Mitsuru Sakano, Hisao Yamashige