Chemical adsorption of NiO nanostructures on nickel foam-graphene for supercapacitor applications

Show simple item record Bello, Abdulhakeem Makgopa, Katlego Fabiane, Mopeli Dodoo-Arhin, David Ozoemena, Kenneth I. Manyala, Ncholu I. 2014-10-09T06:02:38Z 2014-10-09T06:02:38Z 2013-10
dc.description.abstract Few-layer graphene was synthesized on a nickel foam template by chemical vapor deposition. The resulting three-dimensional (3D) graphene was loaded with nickel oxide nanostructures using the successive ionic layer adsorption and reaction technique. The composites were characterized and investigated as electrode material for supercapacitors. Raman spectroscopy measurements on the sample revealed that the 3D graphene consisted of mostly few layers, while X-ray diffractometry and scanning electron microscopy revealed the presence of nickel oxide. The electrochemical properties were investigated using cyclic voltammetry, electrochemical impedance spectroscopy, and potentiostatic charge–discharge in aqueous KOH electrolyte. The novelty of this study is the use of the 3D porous cell structure of the nickel foam which allows for the growth of highly conductive graphene and subsequently provides support for uniform adsorption of the NiO onto the graphene. The NF-G/NiO electrode material showed excellent properties as a pseudocapacitive device with a high-specific capacitance value of 783 F g-1 at a scan rate of 2 mV s-1. The device also exhibited excellent cycle stability, with 84 % retention of the initial capacitance after 1000 cycles. The results demonstrate that composites made using 3D graphene are versatile and show considerable promise as electrode materials for supercapacitor applications. en_US
dc.description.librarian hb2014 en_US
dc.description.sponsorship South African Research Chairs Initiative of the Department of Science and Technology (SARChI-DST) and the National Research Foundation (NRF). University of Pretoria. en_US
dc.description.uri en_US
dc.identifier.citation Bello, A, Makgopa, K, Fabiane, M, Dodoo-Ahrin, D, Ozoemena, KL & Manyala, N 2014, 'Chemical adsorption of NiO nanostructures on nickel foam-graphene for supercapacitor applications', Journal of Materials Science, vol. 48, no. 19, pp. 6707-6712. en_US
dc.identifier.issn 0022-2461 (print)
dc.identifier.issn 1573-4803 (online)
dc.identifier.other 10.1007/s10853-013-7471-x
dc.language.iso en en_US
dc.publisher Springer en_US
dc.rights © Springer Science+Business Media New York 2013. The original publication is available at : en_US
dc.subject Chemical adsorption en_US
dc.subject NiO nanostructures en_US
dc.subject Nickel foam-graphene (NF-G) en_US
dc.subject Supercapacitor applications en_US
dc.title Chemical adsorption of NiO nanostructures on nickel foam-graphene for supercapacitor applications en_US
dc.type Postprint Article en_US

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