Self-assembled three-dimensional hierarchical porous V2O5/graphene hybrid aerogels for supercapacitors with high energy density and long cycle life

This paper describes the synthesis of a hierarchical porous vanadium pentoxide (V2O5)/graphene hybrid aerogel through a low-cost and facile sol-gel method. The V(2)O(5/)graphene hybrid aerogel is synthesized through the in situ growth of V2O5 nanofibers on graphene sheets. The V2O5/graphene hybrid aerogel-based supercapacitors exhibit enhanced specific capacitance (486 F g(-1)), high energy density (68 W h kg(-1)) and outstanding cycle performance. These effects are attributed to the unique hierarchical porous structure of the hybrid aerogel.