THE EFFECT OF REDUCED GRAPHENE OXIDE ON THE ACTIVATED CARBON METAL OXIDE SUPERCAPACITOR

We studied the effect of reduced graphene oxide (RGO) materials on the supercapacitors made of activated carbon and transition metal oxides (ACMO). We tested the supercapacitors using two-probe cyclic voltammetry (CV) and checked the impedance using electrochemical impedance spectroscopy (EIS) at a frequency up to MHz. The results indicated that the 5% of the metal oxide in the ACMO increased the surface area and the capacitance. However, the addition of a low concentration of RGO (2%) to the ACMO decreased it.