Large-scale synthesis of reduced-graphene oxide and its applications in supercapacitors

Graphene-based electrode materials exhibit a high specific capacitance and long charge-discharge cycling life, but the material cost remains high because of the complexity of the graphene manufacturing process. This study employed an electrochemical exfoliation method to prepare graphene in a simple and ecologically friendly procedure. According to research findings, the disordered multi-layer structure of graphene exhibited great purity, porosity, and graphitization. The graphene electrode material showed high electrochemical properties in a two-electrode supercapacitor system, with a specific capacitance of 168.2 F g-1 at a current density of 0.1 A g-1 and a specific capacitance retention of 94.5 % after 1000 cycles. Research shows enormous potential of electrochemical approaches for producing large-scale graphene materials for energy storage application.