High power electrochemical capacitors based on carbon nanotube electrodes
- Hyperion Catalysis International, Inc., Cambridge, Massachusetts 02138 (United States)
Carbon nanotube sheet electrodes have been prepared from catalytically grown carbon nanotubes of high purity and narrow diameter distribution, centered around 80 {Angstrom}. Our study shows that the electrodes are free-standing mats of entangled nanotubes with an open porous structure almost impossible to obtain with activated carbon or carbon fiber. These properties are highly desirable for high power and long cycle life electrochemical capacitors. Specific capacitances of 102 and 49 F/g were measured at 1 and 100 Hz, respectively, on a single cell device with 38 wt{percent} H{sub 2}SO{sub 4} as the electrolyte. The same cell had a power density of {gt}8000 W/kg. {copyright} {ital 1997 American Institute of Physics.}
- OSTI ID:
- 495851
- Journal Information:
- Applied Physics Letters, Vol. 70, Issue 11; Other Information: PBD: Mar 1997
- Country of Publication:
- United States
- Language:
- English
Similar Records
Material characteristics and the performance of electrochemical capacitors for electric/hybrid vehicle applications
Hydrous ruthenium oxide as an electrode material for electrochemical capacitors