Khamlich, SalehBello, AbdulhakeemFabiane, MopeliNgom, Balla D.Manyala, Ncholu I.2013-10-312013-10-312013-11Khamlich, S, Bello, A & Fabiane, M ..et al 2013, 'Hydrothermal synthesis of simonkolleite microplatelets on nickel foam-graphene for electrochemical supercapacitors', Journal of Solid State Electrochemistry, vol. 17, no. 11, pp. 2879-2886.1432-8488 (print)1433-0768 (online)10.1007/s10008-013-2206-0http://hdl.handle.net/2263/32228Nickel foam-graphene (NF-G) was synthesized by chemical vapour deposition followed by facial in situ aqueous chemical growth of simonkolleite (Zn5(OH)8Cl2·H2O) under hydrothermal conditions to form NF-G/simonkolleite composite. X-ray diffraction and Raman spectroscopy show the presence of simonkolleite on the NF-G, while scanning and transmission electron microscopies show simonkolleite micro-plates like structure evenly distributed on the NF-G. Electrochemical measurements of the composite electrode give a specific capacitance of 350 Fg−1 at current density of 0.7 Ag−1 for our device measured in three-electrode configuration. The composite also shows a rate capability of ~87% capacitance retention at a high current density of 5Ag−1,which makes it a promising candidate as an electrode material for supercapacitor applications.en© Springer-Verlag Berlin Heidelberg 2013.The original publication is available at http://www.springer.com/chemistry/physical/journal/10008Composite structureSimonkolleiteSupercapacitorsGraphenePostprint Article