Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (12): 3181-3186.doi: 10.3866/PKU.WHXB20101135

• ELECTROCHEMISTRY • Previous Articles     Next Articles

Preparation and Electrochemical Properties of Polyaniline/Carbon Nanofiber Composite Materials

ZHANG Lei-Yong1, HE Shui-Jian1, CHEN Shui-Liang1, GUO Qiao-Hui2, HOU Hao-Qing1   

  1. 1. College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China;
    2. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
  • Received:2010-06-04 Revised:2010-08-20 Published:2010-12-01
  • Contact: HOU Hao-Qing E-mail:haoqing@jxnu.edu.cn
  • Supported by:

    The project was supported by the Innovation Foundation of Jiangxi Normal University, China (YJS2010059).

Abstract:

Polyaniline/carbon nanofiber (PANI/CNF) composite materials were prepared by in situ polymerization. The functional group, composition, surface morphology, and specific surface area of composite materials were characterized by Fourier transform infrared (FT?IR) spectroscopy, thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and Brunauer?Emmelt?Teller analysis. Cyclic voltammetry (CV) and galvanotactic charge?discharge methods were used to study the electrochemical properties of the PANI/ CNF composite materials. Results showed that the composite materials had a rough surface with a burry PANI structure that was uniformly distributed over the CNF. The composite materials, as electrodes, showed good reversibility in redox reactions. The specific capacitance of 44.4%(w) PANI/CNF was 587.1 F·g-1, the specific energy was 66.1 Wh·kg-1 at a current density of 100 mA·g-1, and the specific power was 1014.2 W·kg-1 at a current density of 800 mA·g-1. Moreover, the specific capacitance of PANI/CNF only decreased by 28% after 1000 charge?discharge cycles. Therefore, the PANI/CNF composite material is an excellent material for use in supercapacitors because of its high electrical conductivity and large specific capacitance.

Key words: Carbon nanofiber mat, Polyaniline, Electrochemical property, Specific capacitance, Composite material

MSC2000: 

  • O646