Evaluation of charge storage ability of zinc doped Co2O3 nanostructures derived by cathodic electrodeposition

Supercapacitor, as one of the promising advanced energy storage devices, has attracted considerable attention because it can offer much higher charge/discharge rate than batteries, higher energy density than conventional capacitors, and long cycle life and environmental friendliness.in this work a facile synthetic route has been proposed to prepare nanostructures of Zn doped Co2O3. The synthesis was carried out by constant current cathodic electrodeposition from Co2+ nitrate solutions. X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) were used to characterize the nanostructures. The storage ability of the obtained nanostructures was investigated by cyclic voltammetry (CV) in 3 M KOH solution. The results indicated that the Zn doped cobalt oxide material shows better performance than the non-doped one, and the charge capacity (SC) of doped cobalt oxide (630 F/g) was higher than pristine cobalt oxide (211 F/g).