Title:
電気化学キャパシタ及びそれに用いる電極材料
Document Type and Number:
Japanese Patent JP4706066
Kind Code:
B2
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.
Inventors:
Osamu Tanaike
Hiroaki Hatori
Kenji Hata
Hiroaki Hatori
Kenji Hata
Application Number:
JP2006219509A
Publication Date:
June 22, 2011
Filing Date:
August 11, 2006
Export Citation:
Assignee:
National Institute of Advanced Industrial Science and Technology
International Classes:
H01G9/00; B82Y99/00; H01G11/02; H01G11/22; H01G11/24; H01G11/36
Domestic Patent References:
| JP2001307951A | ||||
| JP2004002409A | ||||
| JP2005046669A |
Attorney, Agent or Firm:
Toshio Nishizawa