Capacitance properties of graphite/polypyrrole composite electrode prepared by chemical polymerization of pyrrole on graphite fiber

Composite electrodes for supercapacitors are prepared via chemical polymerization of pyrrole (Py) on the surface of a porous graphite fiber matrix. The capacitance properties are investigated with cyclic voltammetry (CV), ac impedance spectroscopy and charge-discharge tests. These electrodes show a specific capacitance of about 400 F g(-1) and a Coulombic efficiency of 96-99%. This indicates that the dipping method is quite suitable for the modification of carbon-based porous graphite fiber to improve the performance of electrodes which can be used in supercapacitors. (C) 2002 Elsevier Science B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2002-03
Language
ENG
Keywords

ELECTROCHEMICAL CAPACITORS; CONDUCTING POLYMERS

Citation

JOURNAL OF POWER SOURCES, v.105, no.1, pp.20 - 25

ISSN
0378-7753
DOI
10.1016/S0378-7753(01)00915-6
URI
http://hdl.handle.net/10203/5020
Appears in Collection
CBE-Journal Papers(저널논문)
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