Hierarchical porous graphene/polyaniline composite film with superior rate performance for flexible supercapacitors

Abstract

A highly flexible graphene free-standing film with hierarchical structure is prepared by a facile template method. With a porous structure, the film can be easily bent and cut, and forms a composite with another material as a scaffold. The 3D graphene film exhibits excellent rate capability and its capacitance is further improved by forming a composite with polyaniline nanowire arrays. The flexible hierarchical composite proves to be an excellent electrode material for flexible supercapacitors.

Keywords: flexible films; graphene; hierarchical structures; polyaniline; supercapacitors.