Hydrothermal synthesis of reduced graphene sheets/Fe2O3 nanorods composites and their enhanced electrochemical performance for supercapacitors |
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| Affiliation: | 1. Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, Nantong Street 145, Harbin 150001, PR China;2. Institute of Advanced Marine Materials, Harbin Engineering University, 150001, PR China;1. Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742, United States;2. Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742, United States;1. Institute of Chemical Sciences, University of Peshawar, 25120, Peshawar, Pakistan;2. Department of Physics, University of Peshawar, 25120, Peshawar, Pakistan;1. Department of Chemistry, Baghdad-ul-Jadeed Campus, The Islamia University, Bahawalpur 63100, Pakistan;2. Department of Physics, Baghdad-ul-Jadeed Campus, The Islamia University, Bahawalpur 63100, Pakistan;3. Chemical Engineering Department, College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia;4. Deanship of Scientific Research, College of Engineering, PO Box 800, King Saud University, Riyadh 11421, Saudi Arabia |
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| Abstract: | Reduced graphene nanosheets/Fe2O3 nanorods (GNS/Fe2O3) composite has been fabricated by a hydrothermal route for supercapacitor electrode materials. The obtained GNS/Fe2O3 composite formed a uniform structure with the Fe2O3 nanorods grew on the graphene surface and/or filled between the graphene sheets. The electrochemical performances of the GNS/Fe2O3 hybrid supercapacitor were tested by cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic charge–discharge tests in 6 M KOH electrolyte. Comparing with the pure Fe2O3 electrode, GNS/Fe2O3 composite electrode exhibits an enhanced specific capacitance of 320 F g−1 at 10 mA cm−2 and an excellent cycle-ability with capacity retention of about 97% after 500 cycles. The simple and cost-effective preparation technique of this composite with good capacitive behavior encourages its potential commercial application. |
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| Keywords: | Graphene nanosheets Composite electrode Supercapacitor |
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