聚苯胺修饰活性炭电极的电化学性能

徐 磊;王 玮

doi:10.3981/j.issn.1000-7857.2011.06.010

科技导报 >

2011 , Vol. 29 >Issue 11-06: 68 - 71

DOI: https://doi.org/10.3981/j.issn.1000-7857.2011.06.010

研究论文

聚苯胺修饰活性炭电极的电化学性能

徐磊;王玮

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1. 日照港集团有限公司科研检测中心，山东日照 2768002. 中国海洋大学材料科学与工程研究院，山东青岛 266100

收稿日期: 2010-04-12

修回日期: 2010-09-13

网络出版日期: 2011-02-28

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Electrochemical Performance of Polyaniline-deposited Active Carbon Electrode

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Received date: 2010-04-12

Revised date: 2010-09-13

Online published: 2011-02-28

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摘要

有机体系下，采用循环伏安法（CV）在活性炭电极表面电聚合聚苯胺制备聚苯胺/活性炭复合电极，通过循环伏安、恒流充放电和电化学交流阻抗谱（EIS）测试了电极的电化学特性，结果表明，聚苯胺/活性炭复合电极具有良好的电容行为，在-1.0～1.5V参比极为Ag/AgCl，测试区间内具有较大的电化学容量，电极比电容高达276F·g-1，较活性炭电极的比电容92F·g-1有了很大提高。并且交流阻抗法测得活性炭电极的电荷转移电阻Rct为4.9Ω，而复合电极Rct仅2.4Ω。1000次充放电测试后，复合电极比电容仅衰减15.7%。由此表明，在有机体系下聚苯胺/活性炭复合电极是一种具有良好循环寿命和高比电容的复合电极材料

关键词： 超级电容器; 聚苯胺; 活性炭; 比电容

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徐磊;王玮 . 聚苯胺修饰活性炭电极的电化学性能[J]. 科技导报, 2011 , 29(11-06) : 68 -71 . DOI: 10.3981/j.issn.1000-7857.2011.06.010

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

Key words： supercapacitor; polyaniline; active carbon; specific capacitance

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