Patents by Inventor Souichirou Suda

Souichirou Suda 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).

  • Negative electrode for lithium secondary battery and lithium secondary battery
    Patent number: 10651458
    Abstract: A negative electrode for a lithium secondary battery includes a layer of a mixture containing graphite powder and an organic binder on a current collector, wherein a diffraction intensity ratio (002)/(110) measured by X-ray diffractometry of the layer of a mixture is 500 or less. A lithium secondary battery includes the negative electrode for a lithium secondary battery, and a positive electrode that includes a lithium compound. This results in less deterioration in the rapid charge and discharge characteristics and the cycle characteristics when the density of the negative electrode is made higher, thereby providing a high capacity lithium secondary battery having the improved energy density per unit volume of the secondary battery.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: May 12, 2020
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Yoshito Ishii, Souichirou Suda, Tatsuya Nishida
  • Negative electrode for lithium secondary battery and lithium secondary battery
    Patent number: 7906240
    Abstract: A negative electrode for a lithium secondary battery, comprising a layer of a mixture containing graphite powder and an organic binder on a current collector, wherein a diffraction intensity ratio (002)/(110) measured by X-ray diffractometry of the layer of a mixture is 500 or less, and a lithium secondary battery, comprising the negative electrode for a lithium secondary battery, and a positive electrode that includes a lithium compound. It results less deterioration in the rapid charge and discharge characteristics and the cycle characteristics when the density of the negative electrode is made higher. Thereby it provides a high capacity lithium secondary battery having the improved energy density per unit volume of the secondary battery.
    Type: Grant
    Filed: January 16, 2004
    Date of Patent: March 15, 2011
    Assignee: Hitachi Chemical Co., Ltd.
    Inventors: Yoshito Ishii, Souichirou Suda, Tatsuya Nishida
  • NEGATIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY
    Publication number: 20110045353
    Abstract: A negative electrode for a lithium secondary battery includes a layer of a mixture containing graphite powder and an organic binder on a current collector, wherein a diffraction intensity ratio (002)/(110) measured by X-ray diffractometry of the layer of a mixture is 500 or less. A lithium secondary battery includes the negative electrode for a lithium secondary battery, and a positive electrode that includes a lithium compound. This results in less deterioration in the rapid charge and discharge characteristics and the cycle characteristics when the density of the negative electrode is made higher, thereby providing a high capacity lithium secondary battery having the improved energy density per unit volume of the secondary battery.
    Type: Application
    Filed: October 28, 2010
    Publication date: February 24, 2011
    Inventors: Yoshito Ishii, Souichirou Suda, Tatsuya Nishida
  • Negative electrode for lithium secondary battery and lithium secondary battery
    Publication number: 20070190423
    Abstract: A negative electrode for a lithium secondary battery, comprising a layer of a mixture containing graphite powder and an organic binder on a current collector, wherein a diffraction intensity ratio (002)/(110) measured by X-ray diffractometry of the layer of a mixture is 500 or less, and a lithium secondary battery, comprising the negative electrode f or a lithium secondary battery, and a positive electrode that includes a lithium compound. It results less deterioration in the rapid charge and discharge characteristics and the cycle characteristics when the density of the negative electrode is made higher. Thereby it provides a high capacity lithium secondary battery having the improved energy density per unit volume of the secondary battery.
    Type: Application
    Filed: January 16, 2004
    Publication date: August 16, 2007
    Inventors: Yoshito Ishii, Souichirou Suda, Tatsuya Nishida