▎ 摘　　要

Microcrystalline graphene oxide (MGO) was reduced by thermal annealing to prepare reduced microcrystalline graphene oxide (RMGO). The produced RMGO was characterized by X-ray diffraction, ultraviolet-visible absorption spectroscopy, Fourier transform infrared spectroscopy and transmission electron microscopy. The results show that the absorption peaks of the oxygen-containing functional groups almost disappear due to the removal of oxygen atoms from the basal plane of graphene oxide in the temperature range of 150-450. degrees C in nitrogen. The electrochemical behaviour of RMGO annealed at different temperature was evaluated by three-electrode cyclic voltammetry and electrochemical impedance spectroscopy. The results show that an obvious increase in specific capacitance and decrease in charge-transfer resistance can be observed for RMGO at the annealing temperature of 250 degrees C.