Electrode Properties of Graphene and Graphene-Based Nanocomposites for Energy Storage Devices

Graphene is a two-dimensional nanosheet consisting of honeycomb lattices of sp(2) carbon atoms. It is one of promising active materials for the anode of lithium-ion battery and the electrode of supercapacitor, due to its large specific surface area(theoretically 2600 m(2) g(-1)), high electric conductivity(typically 8x10(5) S cm(-1)), and mechanical strength. In this review, the synthetic methods of graphene nanosheet and graphene-based nanocomposite are introduced. Also, the electrochemical properties obtainable when the graphene-based materials are adopted to the electrodes of lithium-ion battery and supercapacitor are discussed along with their nanostructures.