物理化学学报 >> 2010, Vol. 26 >> Issue (06): 1521-1526.doi: 10.3866/PKU.WHXB20100626

电化学 上一篇    下一篇

用于超级电容器电极材料的聚苯胺基碳

李利民, 刘恩辉, 李剑, 杨艳静, 沈海杰, 黄铮铮, 向晓霞   

  1. 湘潭大学化学学院, 环境友好化学与应用教育部重点实验室, 湖南 湘潭 411105; 广州市振兴实业有限公司, 广州 510170
  • 收稿日期:2010-01-25 修回日期:2010-03-19 发布日期:2010-05-28
  • 通讯作者: 刘恩辉 E-mail:liuenhui99@sina.com.cn

Polyaniline-Based Carbon for a Supercapacitor Electrode

LI Li-Min, LIU En-Hui, LI Jian, YANG Yan-Jing, SHEN Hai-Jie, HUANG Zheng-Zheng, XIANG Xiao-Xia   

  1. Key Laboratory of Environmentally Friendly Chemistry and Applications, Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, Hunan Province, P. R. China; Guangzhou Zhenxing Industrial Co., Ltd., Guangzhou 510170, P. R. China
  • Received:2010-01-25 Revised:2010-03-19 Published:2010-05-28
  • Contact: LIU En-Hui E-mail:liuenhui99@sina.com.cn

摘要:

在不同温度下碳化硫酸掺杂的聚苯胺制备了含杂原子(氮和氧原子)的新型碳材料. 分别通过扫描电镜、元素分析仪、X射线光电子能谱仪和比表面积测试仪对这些碳材料的形貌特征、元素组成、表面化学组成和比表面积进行了表征. 用循环伏安法、恒电流充放电法和交流阻抗法对其进行了电化学性能的研究. 研究结果表明, 在温度为800 ℃下碳化聚苯胺得到的碳有很好的电化学性能, 尽管它的比表面积很小(325 m2·g-1), 但在0.5 A·g-1电流密度下其比电容高达153 F·g-1. 它的高比电容可能与其含有合适比例的杂原子(氮和氧原子)有关, 因为合适比例的氮和氧杂原子能够产生最大的赝电容. 这些结果表明这种碳材料是一种很有发展前景的超级电容器电极材料.

关键词: 超级电容器, 聚苯胺, 碳, X射线光电子能谱, 电化学交流阻抗

Abstract:

Novel carbonmaterials containing heteroatoms (nitrogen and oxygen)were prepared by carbonizingH2SO4-doped polyaniline at different temperatures. The morphology, elemental composition, surface chemical composition, and surface area of the as-preparedsampleswere investigatedbyscanningelectronmicroscopy(SEM), elemental analyzer, X-ray photoelectron spectroscopy (XPS) and Brunauer-Emmett-Teller (BET) measurements. Electrochemical properties were studied by cyclic voltammetry (CV), galvanostatic charge/discharge and electrochemical impedance spectroscopy (EIS). The results show that the carbon prepared by carbonizing polyaniline at 800 ℃has good electrochemical performance and its specific capacitance value is as high as 153 F·g-1 under a current density of 0.5 A·g-1, although it has a low specific surface area (325 m2·g-1). The high specific capacitance of this carbon is believed to be due to its proper proportion of heteroatoms (nitrogen and oxygen), which provide a large amount of pseudo-capacitance. This kind of carbon material can thus be used as a promising electrode material in supercapacitors.

Key words: Supercapacitor, Polyaniline, Carbon, X-ray photoelectron spectroscopy, Electrochemical impedance spectroscopy

MSC2000: 

  • O646