▎ 摘　　要

NOVELTY - The preparation method of graphene involves: (a) taking graphite material as anode material, and mixed solution of acid and hydrogen peroxide as electrolyte, and carrying out electrolytic reaction to realize electrochemical stripping of anode material; (b) carrying out solid-liquid separation and washing on the electrolyte obtained in step (a) to extract graphene precursor dispersed in electrolyte, drying the extracted graphene precursor to obtain graphene sample; and (c) dissolving the graphene sample in organic solvent. USE - The method is useful for preparing graphene (claimed). ADVANTAGE - The method enables simple and economical preparation of graphene with high purity and quality in an environmentally-friendly manner. DETAILED DESCRIPTION - The preparation method of graphene involves: (a) taking graphite material as anode material, and mixed solution of acid and hydrogen peroxide as electrolyte, and carrying out electrolytic reaction to realize electrochemical stripping of anode material; (b) carrying out solid-liquid separation and washing on the electrolyte obtained in step (a) to extract graphene precursor dispersed in electrolyte, drying the extracted graphene precursor to obtain graphene sample; and (c) dissolving the graphene sample in organic solvent, and carrying out ultrasonic treatment on organic solvent dissolved graphene sample to obtain graphene solution.