Patents by Inventor Osamu Tanaike

Osamu Tanaike 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).

  • Electrochemical capacitor and electrode material for use therein
    Patent number: 8072733
    Abstract: An electrochemical capacitor comprising a nonaqueous electrolyte and a pair of polarizable electrodes, wherein carbon nanotubes are used as an electrode material for at least one of the positive electrode and the negative electrode, the carbon nanotubes have a specific surface area of at least 700 m2/g and contain semiconductive carbon nanotubes, and the electrode material exhibits a voltage dependency of differential capacity by electrochemical doping. The electrochemical capacitor solves the problems associated with activated carbon electrodes and, exploiting the excellent characteristics of carbon nanotubes, has increased capacitance and increased energy density, therefore realizing a reduced internal resistance and a prolonged service life.
    Type: Grant
    Filed: August 17, 2006
    Date of Patent: December 6, 2011
    Assignee: National Institute of Advanced Industrial Science and Technology
    Inventors: Hiroaki Hatori, Osamu Tanaike, Kenji Hata
  • Electrochemical capacitor and electrode material for use therein
    Publication number: 20090122469
    Abstract: The electrochemical capacitor of the invention comprises a nonaqueous electrolyte and a pair of polarizable electrodes, wherein carbon nanotubes are used as an electrode material for at least one of the positive electrode and the negative electrode, the carbon nanotubes have a specific surface area of at least 700 m2/g and contain semiconductive carbon nanotubes, and the electrode material exhibits a voltage dependency of differential capacity by electrochemical doping. The electrochemical capacitor solves the problems with activated carbon electrodes and, exploiting the excellent characteristics of carbon nanotubes, has further increased capacitance and increased energy density, therefore realizing a reduced internal resistance and a prolonged service life.
    Type: Application
    Filed: August 17, 2006
    Publication date: May 14, 2009
    Inventors: Hiroaki Hatori, Osamu Tanaike, Kenji Hata