Citation: WAN Qun-Yi, FAN Shuan-Shi, YUE Xian-Jun, LANG Xue-Mei, XU Wen-Dong, LI Jing, FENG Chun-Hua. Improved Capacitive Performance of Polypyrrole Doped with 9,10-Anthraquinone-2-sulfonic Acid Sodium Salt[J]. Acta Physico-Chimica Sinica, ;2010, 26(11): 2951-2956. doi: 10.3866/PKU.WHXB20101107 shu

Improved Capacitive Performance of Polypyrrole Doped with 9,10-Anthraquinone-2-sulfonic Acid Sodium Salt

1.
Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China

Received Date: 4 May 2010
Available Online: 13 September 2010
Fund Project: 国家自然科学基金(20803025) (20803025) 广东省自然科学基金(8451064101000891) (8451064101000891)华南理工大学中央高校基本科研业务经费专项资金(2009ZM0026) 资助项目 (2009ZM0026)

A polypyrrole(PPy)/9,10-anthraquinone-2-sulfonic acid sodium salt (AQS) composite electrode was prepared by constant-potential electropolymerization using AQS as a counter-ion. Cyclic voltammetry (CV), galvanostatic charge-discharge, and electrochemical impedance spectroscopy (EIS) were used to evaluate its capacitance performance. Experimental results show that the AQS dopant results in an improved specific capacitance, increased long-cycle stability, and a wide working potential range compared to that of using ClO^-₄ as the dopant. The PPy/AQS composite electrode has a specific capacitance of 491 F·g^-1 at a CV scan rate of 50 mV·s^-1 within a potential range of -0.6 to 0.6 V in 1 mol·L^-1 KCl, which is 1.5 times more than that with a PPy/ClO^-₄ composite electrode. The improvement in capacitance should be attributed to the od redox performance of AQS and the porous submicron/ nanosized structure of the resulting composite film.
- Anthraquinone sulfonate,
- Polypyrrole,
- Electrochemical capacitor,
- Electropolymerization,
- Charge-discharge test
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