▎ 摘　　要

NOVELTY - The preparation of graphene involves (i) using graphite material as an anode material, and oxalic acid-and-hydrogen peroxide mixed solution as an electrolyte, electrochemically reacting and electrochemical stripping the anode material, (ii) solid-liquid separating the electrolyte solution, extracting the graphene precursor dispersed in the electrolyte solution, drying the graphene precursor, decomposing the remaining electrolyte to obtain graphene samples, and (iii) dissolving graphene sample in an organic solvent, dissolving, and ultrasonically treating to obtain graphene solution. USE - Preparation of graphene (claimed). ADVANTAGE - The environmentally-friendly and energy-saving method enables the preparation of graphene in large scale at low cost with excellent impurity removal effect, and high productivity.