Masikhwa, T.M. (Tshifhiwa)Madito, M.J. (Moshawe)Momodu, Damilola Y.Dangbegnon, Julien K.Guellati, OuanassaHarat, AichaGuerioune, MohamedBarzegar, FarshadManyala, Ncholu I.2016-08-112016-05Masikhwa, TM, Madito, MJ, Momodu, DY, Dangbegnon, JK, Guellati, O, Harat, A, Guerioune, M, Barzegara, F & Manyala, N 2016, 'High performance asymmetric supercapacitor based on CoAl-LDH/GF and activated carbon from expanded graphite', RSC Advances, vol. 6, no. 52, pp. 46723-46732.2046-206910.1039/C6RA07419Ghttp://hdl.handle.net/2263/56265An asymmetric supercapacitor fabricated with CoAl-layered double hydroxide/graphene foam (LDH/GF) composite as the positive electrode and activated carbon derived from expanded graphite (AEG) as negative electrode in aqueous 6 M KOH electrolyte is reported. This CoAl-LDH/GF//AEG cell achieved a specific capacitance of 101.4 F g-1 at a current density of 0.5 A g-1 with a maximum energy density as high as 28 Wh kg-1 and a power density of 1420 W kg-1. Furthermore, the supercapacitor also exhibited an excellent cycling stability with ∼ 100% capacitance retention after 5000 charging-discharging cycles at a current density of 2 Ag-1. The results obtained show the potential use of the CoAl- LDH/GF//AEG material as suitable electrode for enhanced energy storage as supercapacitor.en© The Royal Society of Chemistry 2016Activated carbon from expanded graphiteSupercapacitorElectrochemical capacitorGraphene foamElectrical double layer capacitorCoAl-layered double hydroxide/graphene foam (LDH/GF)Postprint Article