物理化学学报 >> 2010, Vol. 26 >> Issue (11): 2951-2956.doi: 10.3866/PKU.WHXB20101107

电化学 上一篇    下一篇

9,10-蒽醌-2-磺酸钠盐掺杂对导电聚吡咯电容性能的促进作用

万群义, 樊栓狮, 岳羡君, 郎雪梅, 徐文东, 李静, 冯春华   

  1. 华南理工大学化学与化工学院, 传热强化与过程节能教育部重点实验室, 广州510640
  • 收稿日期:2010-05-04 修回日期:2010-07-20 发布日期:2010-10-29
  • 通讯作者: 冯春华 E-mail:chfeng@scut.edu.cn
  • 基金资助:

    国家自然科学基金(20803025), 广东省自然科学基金(8451064101000891)和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

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

WAN Qun-Yi, FAN Shuan-Shi, YUE Xian-Jun, LANG Xue-Mei, XU Wen-Dong, LI Jing, FENG Chun-Hua   

  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:2010-05-04 Revised:2010-07-20 Published:2010-10-29
  • Contact: FENG Chun-Hua E-mail:chfeng@scut.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20803025), Natural Science Foundation of Guangdong Province, China (8451064101000891) and Fundamental Research Funds for the Central Universities, South China University of Technology, China (2009ZM0026).

摘要:

用恒电位法制成以9,10-蒽醌-2-磺酸钠盐(AQS)为掺杂阴离子的导电聚吡咯(PPy)电化学电容器电极材料,并采用循环伏安(CV)、充放电测试、电化学阻抗(EIS)等方法表征电容性质. 结果表明, 与高氯酸阴离子(ClO-4 )掺杂的PPy相比, PPy/AQS电极材料不仅单位质量电容和电极稳定性得到提高, 工作电压范围也得以扩大. 在1mol·L-1的氯化钾中, 工作电压为-0.6 至0.6 V, 扫描速率为50 mV·s-1时其单位质量电容达到491 F·g-1, 比PPy/ClO-4电极材料提高1.5 倍. 这是由于AQS 自身良好的氧化还原活性和AQS 掺杂有利于聚吡咯膜形成疏松多孔的纳米及亚微米颗粒结构而导致的.

 

关键词: 蒽醌磺酸盐, 聚吡咯, 电化学电容器, 电聚合, 充放电测试

Abstract:

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 good redox performance of AQS and the porous submicron/ nanosized structure of the resulting composite film.

 

Key words: Anthraquinone sulfonate, Polypyrrole, Electrochemical capacitor, Electropolymerization, Charge-discharge test

MSC2000: 

  • O646