High performance supercapacitor based on carbon coated V2O5 nanorods

• Carbon coated V2O5 nanorods were designed using low temperature solution based approach.
• Presence of carbon on V2O5 effectively enhances the electrochemical properties.
• The C@V2O5 nanorods systematically studied for supercapacitor electrode applications
• We report performance of an asymmetric supercapacitor device using C@V2O5 electrode.

Conductive material coating on redox efficient transition-metal oxides is one of the approaches to enhance the conductivity of the metal oxides. This approach could greatly boost the electrochemical performance of supercapacitors. In this article an attractive low cost method to coat conductive carbon on V2O5 nanostructures is reported. When utilized as supercapacitor electrodes, this smart combination of C@V2O5 nanorods exhibits attractive capacitive features, including higher capacitance (417 Fg− 1 at 0.5 Ag− 1), superior rate capacity (341 Fg− 1 at 10 Ag− 1), very low charge transfer resistance (1.1 Ω) and better cyclic stability. An asymmetric supercapacitor device based on C@V2O5 nanorod electrode delivers an energy density of 9.4 Wh kg− 1 at a power density of 170 W kg− 1.

The strategy of carbon coating over V2O5 nanostructures provides enhanced electrochemical performance as a supercapacitor electrode material.Figure optionsDownload as PowerPoint slide