3D cuboidal vanadium diselenide embedded reduced graphene oxide hybrid structures with enhanced supercapacitor properties

The electrochemical supercapacitor performance of a VSe2-reduced graphene oxide (RGO) hybrid has been reported for the first time. The hybrid was synthesized via a one-step hydrothermal route at different concentrations of graphene oxide, i.e. 0.15, 0.3, and 0.75 wt%. Enhanced supercapacitor performances were observed in the case of the hybrid obtained at 0.3 wt% of GO. It showed a specific capacitance of similar to 680 F g(-1) at a mass normalised current of 1 A g(-1) which was similar to 6 and similar to 5 fold higher than those of bare VSe2 and bare RGO, respectively. Furthermore, a high energy density of similar to 212 W h kg(-1), power density of similar to 3.3 kW kg(-1), and similar to 81% retention of the initial capacitance even after 10000 cycles of charge-discharge were observed.