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| Electrochemical Performance of Polyaniline-deposited Active Carbon Electrode |
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Abstract: Polyaniline was fabricated by Cyclic Voltammetry (CV) on the surface of active carbon electrode in organic solvent. The electrochemical characterisation of the materials was carried out by means of cyclic voltammetry, galvanostatic charge-discharge experiments and Electrochemical Impedance Spectroscopy (EIS). The experiment results show that, the PANI/AC electrode exhibits typical capacitive behavior at the voltage window range from -1.0 to 1.5V vs Ag/AgCl. The specific capacitance of the PANI/AC electrode reaches up to 276F·g-1 in comparison with a value of 92F·g-1 for the bare-carbon electrode. And the ionic charge transfer resistance of the PANI/AC electrode is 2.4Ω in comparison with a value of 4.9Ω for the active carbon electrode. The electrode also shows an excellent cyclic life. The capacitance is decayed only by 15.7% after 1000 cycles for the composite electrode. Therefore, it is demonstrated that the loading of PANI onto high surface area activate carbon can greatly improve the performance of the electrode, and the composite is a very promising electrode material for applications in supercapacitors
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Received: 12 April 2010
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Corresponding Authors:
lei xu
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2011, Vol. 29 
