Acta Phys. -Chim. Sin. ›› 2007, Vol. 23 ›› Issue (06): 820-824.doi: 10.3866/PKU.WHXB20070605

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Electrochemical Capacitance of Camphorsulfonic Acid Doped Polyaniline Microtubes Prepared at Low Temperature

LU Xin-Mei; WU Quan-Fu; MI Hong-Yu; ZHANG Xiao-Gang   

  1. Institute of Applied Chemistry, Xinjiang University, Urumqi 830046, P. R. China; College of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China

  • Received:2006-12-06 Revised:2007-01-08 Published:2007-06-04
  • Contact: ZHANG Xiao-Gang


Polyaniline(PANI) microtubes were prepared at low temperature with camphorsulfonic acid (CSA) as dopant. The structure and morphology of the microtubes were examined by Fourier-transforminfrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The length of the microtubes was 2-3 μm and the outer diameter was 300-400 nm. The results indicated that the higher concentration of dopant was liable to the PANI-CSA microtube formation. Electrochemical capacitance properties of the doped polyaniline electrode were investigated by means of cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic charge/discharge measurements. When the molar ratio of aniline/CSA was 1:1, polyaniline had a good stability and cyclic performance, and the specific capacitance reached up to 522 F·g-1.

Key words: Polyaniline, Camphorsulfonic acid, Low temperature synthesis, Electrochemical capacitor


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