Patents by Inventor Kaoru Doi

Kaoru Doi 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).

  • Conductive polymer/porous carbon material composite and electrode material using same
    Patent number: 9165720
    Abstract: The purpose of the present invention is to provide: an electric double-layer capacitor, a lithium ion secondary battery, and a lithium ion capacitor, each of which has excellent cycle characteristics; an electrode material which is capable of providing the electric double-layer capacitor, the lithium ion secondary battery, and the lithium ion capacitor; and a composite which is used in the electrode material. The composite of the present invention is a composite produced by compositing from 0.5 to 5 parts by mass of nitrogen atom-containing conductive polymer per 100 parts by mass of porous carbon material. The composite of the present invention is a composite where the peak area ratio (nitrogen/carbon ratio) of peak area derived from nitrogen atoms to peak area derived from carbon atoms in the spectrum by X-ray photoelectron spectroscopy becomes 0.005 to 0.05.
    Type: Grant
    Filed: April 10, 2012
    Date of Patent: October 20, 2015
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Tomoyuki Sakai, Tsukasa Maruyama, Kaoru Doi, Manabu Kato
  • CONDUCTIVE POLYMER/POROUS CARBON MATERIAL COMPOSITE AND ELECTRODE MATERIAL USING SAME
    Publication number: 20140030594
    Abstract: The purpose of the present invention is to provide: an electric double-layer capacitor, a lithium ion secondary battery, and a lithium ion capacitor, each of which has excellent cycle characteristics; an electrode material which is capable of providing the electric double-layer capacitor, the lithium ion secondary battery, and the lithium ion capacitor; and a composite which is used in the electrode material. The composite of the present invention is a composite produced by compositing from 0.5 to 5 parts by mass of nitrogen atom-containing conductive polymer per 100 parts by mass of porous carbon material. The composite of the present invention is a composite where the peak area ratio (nitrogen/carbon ratio) of peak area derived from nitrogen atoms to peak area derived from carbon atoms in the spectrum by X-ray photoelectron spectroscopy becomes 0.005 to 0.05.
    Type: Application
    Filed: April 10, 2012
    Publication date: January 30, 2014
    Applicant: THE YOKOHAMA RUBBER CO., LTD.
    Inventors: Tomoyuki Sakai, Tsukasa Maruyama, Kaoru Doi, Manabu Kato