Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (06): 1521-1526.doi: 10.3866/PKU.WHXB20100626

• ELECTROCHEMISTRY • Previous Articles     Next Articles

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

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