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Citation: WANG Xiao-Feng, RUAN Dian-Bo, WANG Da-Zhi, LIANG Ji. Hybrid Electrochemical Supercapacitors Based on Polyaniline and Activated Carbon Electrodes[J]. Acta Physico-Chimica Sinica, ;2005, 21(03): 261-266. doi: 10.3866/PKU.WHXB20050307 shu

Hybrid Electrochemical Supercapacitors Based on Polyaniline and Activated Carbon Electrodes

1.
Department of Precision Instruments and Mechanics, Tsinghua University, Beijing　100084; Department of Mechanical Engineering, Tsinghua University, Beijing　100084

Received Date: 15 July 2004
Available Online: 15 March 2005

This study reports a hybrid capacitor in H₂SO₄ aqueous electrolyte, which consists of polyaniline as a cathode and activated carbon as an anode. The electrochemical performance of the hybrid capacitor is characterized by cyclic voltammetry and a constant current charge/discharge test. The hybrid capacitor shows capacitor behavior with an extended operating voltage of 1.4 V. From integrating the cyclic voltammetry curve, specific capacitances of 420 F•g^－1 and 160 F•g^－1 are obtained for polyaniline and activated carbon, respectively. The cycling behavior of the hybrid electrochemical capacitor is examined in a two-electrode cell by means of cyclic voltammetry. From constant current charging and discharging test, the values for the specific energy and real specific power are 15.5 W•h•kg^－1 and 2.4 W•g^－1, respectively, in the cell voltage range between 0 and 1.4 V. The maximum specific power reach a value of 20.4 W•g^－1. The self-discharge rate of this hybrid supercapacitor is much lower than the double layer capacitor composed of activated carbon electrodes.
- Polyaniline; Activated carbon; Supercapacitor; Hybrid capacitor
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