A novel quaternary carbon/metal oxide based nano-composite electrode with high electrochemical capacitive performance

A facile one-pot hydrothermal method is employed to synthesize {CNT-MnO2-Ni(OH)(2)} (CMN), {rGO-MnO2-Ni(OH)(2)} (RMN) along with a novel composite material{rGO-CNT-MnO2-Ni(OH)(2)} (RCMN). This paper first time reports reduced graphene oxide-multiwall carbon nanotube-manganese dioxide-nickel hydroxide rGO-CNT-MnO2-Ni(OH)(2) quaternary composite powder as a supercapacitor electrode material. The as-obtained rGO-CNT-MnO2-Ni(OH)(2) quaternary composite shows high specific capacitance (1906.4 F g(-1)) at 3 mV s(-1). In addition, cyclic stability measurement reveals that RCMN composite retains admirable capacitance (92.5%) even after 10,000 cycles. The enhancement in cyclic stability and specific capacitance is attributed to the exclusive combination of rGO/CNT as a conductive network and MnO2/Ni(OH) (2) nanostructures as active materials which endorse effective charge transfer and expedites high capacitance and cyclic stability.