Journal
CERAMICS INTERNATIONAL
Volume 41, Issue 3, Pages 4374-4380Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2014.11.127
Keywords
ZnO; Energy storage; Graphene; Supercapacitors
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Funding
- National Natural Science Foundation of China [51002129, 11204262, 11204261]
- Open Fund Based on Innovation Platform of Hunan Colleges and Universities [13K045, 12K045]
- Natural Science Foundation of Hunan Province, China [14113079]
- China Postdoctoral Science Foundation [20100480068]
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A simple one-pot green electrodeposition route is presented for the synthesis of ZnO/graphene nanosheets composite. During a electrochemical deposition process, the graphene oxide nanosheets loose oxygen-containing functional group to become graphene nanosheets (GNS), and zinc oxide (ZnO) is also electrochemically deposited on the electrode. Such hybrid microstructure facilitates the charge and ion transport in the electrode, which has been observed by scanning electron microscopy. Besides, the as-prepared ZnO/GNS sample also has been characterized with X-ray powder diffraction and Raman spectra. Moreover, the electrochemical performance of the obtained composite used as supercapacitor electrode is investigated by cyclic voltanunerty, galvanostatic charge/discharge, and electrochemical impedance spectra tests. At the current density of 3 Ag-1, the resulting ZnO/GNS composite exhibits an enhanced specific capacitance of 291 Fg(-1), much larger than that of pure ZnO (118.8 Fg(-1)). (C) 2014 Elsevier Ltd and Teclma Group S.r.l. All rights reserved.
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