▎ 摘　　要

The synthesis of graphene materials in both high quality and quantity via economic ways is highly desirable and meaningful for practical applications. In this study, we reported the preparation of reduced graphene oxide (rGO) nanosheets in quantity via the anodic exfoliation of graphite in (NH4)(2)S2O8 aqueous solution. The proposed electrochemical exfoliation mechanism disclosed that SO4 (-2) and O-2 (-2) could be intercalated into those graphite sheets, and rGO was obtained by the formation of gaseous SO2 and O-2 within graphite sheets. The as-prepared sample is characterized by X-ray diffraction, Scanning electron microscopy Fourier transform infrared spectroscopy, transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) to confirm the formation of rGO. The XRD results indicated that the distance spacing of rGO was longer than that of graphite and the crystal structure of graphite was changed. The results of SEM exposed the random and ultrathin paper-like morphology of the rGO sheets. TEM images of rGO display interconnected sheet-like silky wave with wrinkled and clumped structure. We obtained the highest specific capacitance of 40.19 F/g for rGO at scan rate 50 mV/s. Our work has a bright future for large-scale rGO production intended for electrochemical energy storage.