Electrochemical characterization of carbon nanotubes as electrode in electrochemical double-layer capacitors

Carbon nanotubes uniformly 50 nm in diameter were directly grown on graphite foil. Cyclic voltammetry (CV) shows that the carbon nanotube/graphite foil electrode has a high specific capacitance (115.7 F/g at a scan rate of 100 mV/s) and exhibits typical double-layer behavior. A rectangular-shaped CV...

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Bibliographic Details
Published in:Carbon (New York) 2002-01, Vol.40 (8), p.1193-1197
Main Authors: Chen, J.H, Li, W.Z, Wang, D.Z, Yang, S.X, Wen, J.G, Ren, Z.F
Format: Article
Language:English
Subjects:
A. Carbon nanotubes, Electrodes
Applied sciences
B. Chemical vapor deposition
C. Scanning electron microscopy (SEM), Sputtering
Electronic equipment and fabrication. Passive components, printed wiring boards, connectics
Electronics
Exact sciences and technology
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Summary:Carbon nanotubes uniformly 50 nm in diameter were directly grown on graphite foil. Cyclic voltammetry (CV) shows that the carbon nanotube/graphite foil electrode has a high specific capacitance (115.7 F/g at a scan rate of 100 mV/s) and exhibits typical double-layer behavior. A rectangular-shaped CV curve persists even at a scan rate of 100 mV/s in 1.0 M H 2SO 4 aqueous solution, which suggests that the carbon nanotube electrode could be an excellent candidate as the electrode in electrochemical double-layer capacitors. In addition, the influence of the potential scan rate, aging, and the electrolyte solution on the specific capacitance of nanotube electrodes was also studied.
ISSN:0008-6223
1873-3891
DOI:10.1016/S0008-6223(01)00266-4