High-Power Supercapacitive Properties of Graphene Oxide Hybrid Films with Highly Conductive Molybdenum Disulfide Nanosheets

By introducing a graphene oxide (GO) sheet as a phase stabilizer and a mechanical supporter, MoS2/GO hybrid films consisting of a high concentration of distorted 1T-MoS2 are successfully fabricated through a post-annealing process in air with the form of a restacked film. After the annealing process, the MoS2 nanosheets undergo direct binding with the oxygen functional groups of GO, maintaining their highly conducting 1T phase and leading to distorted 1T-MoS2 or 1T-MoS2. A hybrid film-based supercapacitor reveals significantly enhanced electrochemical properties, such as an ultrahigh volumetric power density (approximate to 207Wcm(-3)), high volumetric capacitance (approximate to 380Fcm(-3) at 10mVs(-1)), superior rate capability, and a semi-permanent cycle life (95% retention after 10000 cycles) in an aqueous electrolyte.