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

Abstract

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 V₂O₅/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.