Preparation and electrochemical performance of activated carbon thin films with polyethylene oxide-salt addition for electrochemical capacitor applications |
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Authors: | R Chandrasekaran Y Soneda J Yamashita M Kodama H Hatori |
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Institution: | (1) National Institute of Advanced Industrial Science and Technology, Tsukuba Ibaraki, 305-8569, Japan |
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Abstract: | The effect of polymer–salt addition in the activated carbon electrode for electric double-layer capacitor (EDLC) has been
investigated. A series of composite thin film electrode consisting of activated carbon, carbon black, polytetrafluoroethylene
and polymer–salt complex (polyethyleneoxide–LiClO4) with an appropriate weight ratio were prepared and examined their performance for EDLCs using 1 mol L−1 LiClO4 in ethylene carbonate:diethylcarbonate electrolyte solution. The electrochemical capacitance performances of these electrodes
with different compositions were characterized by cyclic voltammetry, galvanostatic charge–discharge cycling, and AC impedance
measurements. By comparison, the best results were obtained with a composite electrode rich in polymer–salt additive (132 F
g−1 at 100 mA g−1 of galvanostatic experiment). In general, the polymer–salt-containing electrode had shown improved performance over activated
carbon electrodes without polymer–salt at high current density. |
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Keywords: | Electric double-layer capacitor Activated carbon electrode Polymer– salt complex Rate performance |
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