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Facile synthesis of reduced graphene oxide/MWNTs nanocomposite supercapacitor materials tested as electrophoretically deposited films on glassy carbon electrodes

机译:还原性氧化石墨烯/ MWNTs纳米复合超级电容器材料的简便合成,在玻璃碳电极上作为电泳沉积膜进行测试

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摘要

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.© 2013, Springer Science+Business Media Dordrecht.
机译:本文报道了一种简便的合成方法,用于还原氧化石墨烯(rGO)/多壁碳纳米管(MWNTs)纳米复合材料。初始步骤包括使用氧化石墨烯分散MWNT,随后使用1-抗坏血酸(LAA)作为温和的还原剂还原生成的氧化石墨烯/ MWNTs复合材料。通过LAA进行还原可保留rGO工作表与MWNT之间的相互作用。表征了含有分散体的rGO / MWNTs复合材料,并将其阳极电泳沉积在玻璃碳电极上,以形成用于电容测试的高表面积薄膜。在rGO / MWNTs复合电极中观察到伪电容峰,从而获得了优异的性能,记录的电容值高达134.3 F g-1。此电容值高于观察到的LAA还原GO(LAA-rGO)(63.5 F g-1),电化学还原GO(EC-rGO)(27.6 F g-1)或电化学还原GO / MWNTs(EC -rGO / MWNTs)(98.4 F g-1)基电极。©2013,Springer Science + Business Media Dordrecht。

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