Abstract
Activated carbon for supercapacitor electrode was prepared from polyaniline using chemical activation with ZnCl2. The morphology, surface chemical composition, and surface area of the as-prepared carbon materials were investigated by scanning electron microscope, atomic force microscopy, X-ray photoelectron spectroscopy, and Brunauer–Emmett–Teller measurement, respectively. Electrochemical characteristics were evaluated by cyclic voltammograms, galvanostatic charge/discharge, and electrochemical impedance spectroscopy tests in 6.0 mol L−1 KOH aqueous solution. The electrochemical measurements showed that ZnCl2 activation led to better capacitive performances. The activated carbon presented a high-specific gravimetric capacitance of 174 F g−1, with rectangular cyclic voltammetry curves at a scan rate of 2 mV s−1, and it remained 93% even at a high scan rate of 50 mV s−1. These demonstrated that activated carbon would be a promising electrode material for supercapacitors.
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The authors are grateful for the project supported by Hunan Provincial Natural Science Foundation of China (07JJ6015).
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Xiang, X., Liu, E., Huang, Z. et al. Preparation of activated carbon from polyaniline by zinc chloride activation as supercapacitor electrodes. J Solid State Electrochem 15, 2667–2674 (2011). https://doi.org/10.1007/s10008-010-1258-7
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DOI: https://doi.org/10.1007/s10008-010-1258-7