Patents by Inventor Yoichi KOIKE

Yoichi KOIKE 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 ion secondary battery and method for producing the same
    Patent number: 10629907
    Abstract: A lithium ion secondary battery with a high capacity retention rate, and a method for producing the lithium ion secondary battery. The lithium ion secondary battery may comprise a cathode including a cathode active material layer comprising a cathode active material and Li3PO4, an anode including an anode active material layer comprising an anode active material, and an electrolyte layer being disposed between the cathode and the anode and comprising a liquid electrolyte, wherein a C1s element ratio obtained by X-ray photoelectron spectroscopy measurement of the Li3PO4 is 18.82 at % or less.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: April 21, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yohei Shindo, Yoichi Koike
  • LITHIUM ION SECONDARY BATTERY AND METHOD FOR PRODUCING THE SAME
    Publication number: 20180102540
    Abstract: A lithium ion secondary battery with a high capacity retention rate, and a method for producing the lithium ion secondary battery. The lithium ion secondary battery may comprise a cathode including a cathode active material layer comprising a cathode active material and Li3PO4, an anode including an anode active material layer comprising an anode active material, and an electrolyte layer being disposed between the cathode and the anode and comprising a liquid electrolyte, wherein a C1s element ratio obtained by X-ray photoelectron spectroscopy measurement of the Li3PO4 is 18.82 at % or less.
    Type: Application
    Filed: September 26, 2017
    Publication date: April 12, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yohei SHINDO, Yoichi KOIKE