Abstract
Ni(OH)2/graphene foam (GF) electrode was synthesized for electrochemical application by a facile hydrothermal reflux technique. The results obtained from the scanning electron microscopy showed that the Ni(OH)2 spheres successfully coated the entire surface area of the GF. Specific capacitance of 2420 F g−1 at a current density of 1 A g−1 was obtained for Ni(OH)2/GF composite electrode, as well as a capacitance retention of ~93 % after 1000 charge–discharge cycles, demonstrating excellent cycle stability in 6.0 M KOH electrolyte. These results suggest that the composite could be a potential active material for high-performance electrochemical applications.
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Acknowledgements
This work is based on the research supported by the South African Research Chairs Initiative of the Department of Science and Technology and National Research Foundation of South Africa (Grant No. 97994). Any opinion, finding and conclusion or recommendation expressed in this material is that of the author(s) and the NRF does not accept any liability in this regard. A. A. Khaleed acknowledges financial support from University of Pretoria and the NRF through SARChI in Carbon Technology and Materials.
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Khaleed, A.A., Bello, A., Dangbegnon, J.K. et al. A facile hydrothermal reflux synthesis of Ni(OH)2/GF electrode for supercapacitor application. J Mater Sci 51, 6041–6050 (2016). https://doi.org/10.1007/s10853-016-9910-y
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DOI: https://doi.org/10.1007/s10853-016-9910-y