Journal
SYNTHETIC METALS
Volume 159, Issue 3-4, Pages 260-266Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2008.09.018
Keywords
Supercapacitors; Multi-walled carbon nanotubes; Polyaniline; Electrochemical polymerization; Specific capacitance
Funding
- National Natural Science Foundation of China [50602020]
- National Basic Research Program of China [2007CB216408]
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Multi-walled carbon nanotube (MWCNT)/polyaniline (PANI) composite films were prepared by in-situ electrochemical polymerization of an aniline solution containing different MWCNT contents. The super-capacitive behaviors of these films were investigated with cyclic voltammetry (CV), charge-discharge tests, and ac impedance spectroscopy. The results revealed that the MWCNT/PANI films show much higher specific capacitance (SC), better power characteristic, better cyclic stability, and more promising for applications in supercapacitors than a pure PANI film electrode. The highest specific capacitance value of 500 F g(-1) was obtained for the MWCNT/PANI composite film containing MWCNT of 0.8 wt.%. The improvement mechanisms of the capacitance of the composites are also discussed in detail. (C) 2008 Elsevier B.V. All rights reserved.
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