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Citation: Chen Hong, Chen Jin-Song, Zhou Hai-Hui, Jiao Shu-Qiang, Chen Jin-Hua, Kuang Ya-Fei. The Application of Nano-fibrous Polyaniline in Electrochemical Capacitor[J]. Acta Physico-Chimica Sinica, ;2004, 20(06): 593-597. doi: 10.3866/PKU.WHXB20040608 shu

The Application of Nano-fibrous Polyaniline in Electrochemical Capacitor

1.
College of Chemistry and Chemical Engineering;　1College of Material Science and Engineering, Hunan University, Changsha　410082

Received Date: 30 October 2003
Available Online: 15 June 2004

Nano-fibrous polyaniline (PANI) film was synthesized by pulse galvanostatic method (PGM) and the electrodes of the nano-fibrous PANI film were used to construct electrochemical capacitor in this paper. The scanning electron microscopy result shows that the nano-fibrous PANI has a diameter of about 100 nm and a length of several micrometers. The PANI electrochemical capacitor was characterized by cyclic voltammetry, galvanostatic charge/discharge and ac impedance in NaClO4＋HClO4 mixed electrolyte. The results show that, the supercapacitor constructed by nano-fibrous PANI contains larger capacitance than capacitors constructed by granular PANI, which is prepared by galvanostatic method (GM) with the same deposited charge as PGM. From charge/discharge studies of nano-fibrous polyaniline capacitor, a specific capacitance of 699 F•g－1 and a specific energy density of 54.6 Wh•kg－1 have been obtained at discharge current density of 3.5 mA•cm－2. The PANI supercapacitor also shows little degradation of capacitance after long cycles. All results suggest that the nano-fibrous PANI is a prospect material for supercapacitor.
- Pulse galvanostatic method;Electrochemical capacitor;Nano-fibrous PANI;Specific capacitance
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