Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 739, Issue -, Pages 522-528Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2017.12.248
Keywords
Graphene oxide; Zinc oxide; Precipitation; Supercapacitor; Electrode
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Funding
- BioNano Health-Guard Research Center - Ministry of Science, ICT & Future Planning (MSIP) of Korea as Global Frontier Project [H-GUARD_GSG1702C204]
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In this report, hierarchical graphene oxide/zinc oxide composites were fabricated by precipitation of zinc oxide on graphene oxide for supercapacitor electrode. An environmentally friendly and facile one-step precipitation method, was developed to synthesize the composites with graphene oxide and zinc oxide. The electrochemical performance of the graphene oxide/zinc oxide composites for energy storage was investigated. The maximum specific capacitance of 97 F/g at a current density of 0.5 A/g by galvanostatic charging-discharging was achieved in 1 M Na2SO4 electrolyte. The specific capacitance presented an increase of 83% with respect to the graphene oxide electrode. In addition, graphene oxide with zinc oxide electrode showed 90.8% retention of the specific capacitance for 5000 cycle tests. The results suggest that graphene oxide/zinc oxide composites offer a promising material for supercapacitor electrode. (c) 2017 Published by Elsevier B.V.
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