Conductive porous sponge-like ionic liquid-graphene assembly decorated with nanosized polyaniline as active electrode material for supercapacitor

We report the development of three-dimensional (3D) porous sponge-like ionic liquid (IL) graphene hybrid material by integrating IL molecules and graphene nanosheets via self-assembly process. The asobtained IL graphene architecture possesses high surface area, efficient electron transport network and fast charge transfer kinetics owing to its highly porous structure, and unique hydrophilic properties derived from the IL anion on its surface, which endows it with high desire for supercapacitor application. Redox-active polyaniline (PANI) nanorods are further decorated on IL graphene scaffold bsv electropolymerization. When utilized as freestanding 3D electrode for supercapacitor, the resultant PAN1 modified IL graphene (PANI IL graphene) electrode exhibits a specific capacitance up to 662 F g(-1) at the current density of 1.0 A g(-1), with a high capacitance retention of 73.7% as current densities increase from 1.0 to 20 A g(-1), and the capacitance degradation is less than 7.0% after 5000 charge discharge cycles at 10 A g(-1). (C) 2015 Elsevier B.V. All rights reserved.