Facile synthesis of reduced graphene oxide/MWNTs nanocomposite supercapacitor materials tested as electrophoretically deposited films on glassy carbon electrodes |
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Authors: | Widsanusan Chartarrayawadee Simon Edward Moulton Chee On Too Byung Chul Kim Rao Yepuri Tony Romeo Gordon George Wallace |
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Affiliation: | 1. ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, University of Wollongong, Wollongong, NSW, 2522, Australia 2. Department of Chemistry, University of Dongguk-Seoul, 30, Pil-Dong-ro, 1-gil, Jung-gu, Seoul, 100-715, Korea
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Abstract: | This paper reports on a facile synthesis method for reduced graphene oxide (rGO)/multi-walled carbon nanotubes (MWNTs) nanocomposites. The initial step involves the use of graphene oxide to disperse the MWNTs, with subsequent reduction of the resultant graphene oxide/MWNTs composites using l-ascorbic acid (LAA) as a mild reductant. Reduction by LAA preserves the interaction between the rGO sheets and MWNTs. The dispersion-containing rGO/MWNTs composites was characterized and electrophoretically deposited anodically onto glassy carbon electrodes to form high surface area films for capacitance testing. Pseudo capacitance peaks were observed in the rGO/MWNTs composite electrodes, resulting in superior performance with capacitance values up to 134.3 F g?1 recorded. This capacitance value is higher than those observed for LAA-reduced GO (LAA-rGO) (63.5 F g?1), electrochemically reduced GO (EC-rGO) (27.6 F g?1), or electrochemically reduced GO/MWNTs (EC-rGO/MWNTs) (98.4 F g?1)-based electrodes. |
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