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Reduction of Graphene Oxide with Ni Powder for the Preparation of Ni(OH)2/Reduced Graphene Oxide Hybrid Electrodes for Supercapacitors

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A green and simple method to reduce graphene oxide (GO) with Ni powder has been developed. The reduction of GO by Ni powder was traced by UV-visible absorption spectroscopy, and the obtained reduced graphene oxide (RGO) was analyzed with some kinds of characterization methods. These results showed that the Ni powder efficiently reduced GO to form RGO. The by-product, Ni2+ ions, produced during the reaction between the GO and the Ni powder were chemically transformed to Ni(OH)2 and formed Ni(OH)2/RGO hybrid materials. The Ni(OH)2/RGO hybrid materials were used as electrode materials of supercapacitors and their capacitance was studied by cyclic voltammetry and galvanostatic charge/discharge. The Ni(OH)2/RGO electrodes showed excellent electrochemical performance with a highest specific capacitance of about 621 F ยท g–1 and improved cycling stability.
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Keywords: GRAPHENE OXIDE; NI(OH)2/RGO HYBRID; REDUCTION; SUPERCAPACITORS

Document Type: Research Article

Publication date: February 1, 2015

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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