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Electrochemical performance of polyaniline nanofibres and polyaniline/multi-walled carbon nanotube composite as an electrode material for aqueous redox supercapacitors

journal contribution
posted on 27.09.2007, 00:00 authored by S Sivakkumar, W Kim, J A Choi, D MacFarlane, Maria ForsythMaria Forsyth, D W Kim
Polyaniline (PANI) nanofibres are synthesized by interfacial polymerization and their electrochemical performance is evaluated in an aqueous redox supercapacitor constituted as a two-electrode cell. The initial specific capacitance of the cell is 554 F g−1 at a constant current of 1.0 A g−1, but this value rapidly decreases on continuous cycling. In order to improve the cycleability of the supercapacitor, a composite of polyaniline with multi-walled carbon nanotubes (CNTs) is synthesized by in situ chemical polymerization. Its capacitive behaviour is evaluated in a similar cell configuration. A high initial specific capacitance of 606 F g−1 is obtained with good retention on cycling. In both supercapacitors, the effect of charging potential on cycling performances is investigated.

History

Journal

Journal of power sources

Volume

171

Issue

2

Pagination

1062 - 1068

Publisher

Elsevier SA

Location

Switzerland

ISSN

0378-7753

eISSN

1873-2755

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2007, Elsevier B.V. All rights reserved.