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The Scientific World Journal
Volume 2013, Article ID 940153, 8 pages
http://dx.doi.org/10.1155/2013/940153
Research Article

Electrochemical Properties of PANI as Single Electrode of Electrochemical Capacitors in Acid Electrolytes

1School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China
2School of Science, Wuhan University of Science and Technology, Wuhan 430081, China

Received 13 August 2013; Accepted 2 September 2013

Academic Editors: C.-C. Chang and J. Xu

Copyright © 2013 Haihua Zhu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The polyaniline (PANI) powder with globular sponge-like morphology was prepared by chemical solution polymerization, and its morphology and chemical structure were characterized by scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FTIR), respectively. The single electrode of electrochemical capacitor was made using the prepared PANI powder as active material and carbon paper as current collector. Electrochemical properties of PANI as a single electrode in 1 M HCl and 1 M H2SO4 electrolyte solution were tested by galvanostatic charge/discharge (GCD) and cyclic voltammetry (CV) techniques. It has been found that PANI has higher specific capacitance of 302.43 Fg−1, higher specific energy of 54.44 Wh·kg−1 at 0.5 Ag−1, and higher working potential in 1 M HCl than those in 1 M H2SO4.