V2O5/functionalized MWCNT hybrid nanocomposite: the fabrication and its enhanced supercapacitive performance

The vanadium pentoxide (V2O5) has been attached to functionalized multiwall carbon nanotube (f-MWCNT) networks by simplified solution based approach. The product V2O5/f-MWCNT hybrid nanocomposite has been exploited for supercapacitor electrode application. The addition of f-MWCNT with V2O5 significantly improves the surface area and conductivity, which leads the high energy and power densities. This nanocomposite shows highest specific capacitance up to 410 F g (1) and 280 F g (1) at current densities of 0.5 and 10 A g (-1) respectively. Moreover, this nanocomposite provides excellent energy density (similar to 57W h kg (-1)), better rate capacity, and a good retention of capacity (similar to 86%) up to 600 cycles of charge-discharge. Further a symmetric supercapacitor was fabricated using V2O5/f-MWCNT nanocomposite as electrodes. It shows a specific capacitance of 64 F g(-1) at a current density of 0.5 A g(-1).