▎ 摘　　要

NOVELTY - Surface modifying graphene for performing a surface modifying process on graphene, comprises: placing a graphene powder mixed with a surface modifying agent in a closed container in vacuum, heating the graphene powder up to a treatment temperature higher than a preset impurity desorption temperature for a period of time to desorb an impurity attached to the surface of the graphene powder by vacuum and heating so that the impurity is removed due to thermal decomposition into gas dispersing away; and adjusting the treatment temperature to a surface modifying adsorption temperature. USE - The method is useful for surface modifying graphene for performing a surface modifying process on graphene. ADVANTAGE - The method: involves only physical adsorption and does not involve chemical reaction, thus simple, safe and eco-friendly; provides the graphene with improved uniformity and enhances performance; does not use the risky process like oxidizing graphite material or re-reducing oxidized graphite to control the oxygen containing functional group; and does not perform the process of functionalizing edge functional groups on the graphite material for a gaseous reaction. DETAILED DESCRIPTION - Surface modifying graphene for performing a surface modifying process on graphene, comprises: placing a graphene powder mixed with a surface modifying agent in a closed container in vacuum, heating the graphene powder up to a treatment temperature higher than a preset impurity desorption temperature for a period of time to desorb an impurity attached to the surface of the graphene powder by vacuum and heating so that the impurity is removed due to thermal decomposition into gas dispersing away; and adjusting the treatment temperature to a surface modifying adsorption temperature that is higher than the sublimation point of the surface modifying agent and lower than a thermal decomposition temperature of the surface modifying agent and injecting a gaseous surface modifying agent having a sublimation point such that the surface modifying agent is adsorbed on the surface of the graphene powder due to a physical adsorption effect of pi-pi stacking and surface modified graphene is obtained.