▎ 摘　　要

NOVELTY - Preparing high quality graphene material comprises adding electrolyte solution, graphite raw material and an electrode to the electrolytic container, contacting the electrode with electrolyte solution, physically separating the electrode from graphite raw material, applying an electric field to the electrode, intercalating and cleavage occurs when the graphite raw material is not in contact with the electrode, where the electrolyte solution undergoes an electrochemical reaction to produce intercalation material peroxide, and generating electric field by the electrode drives the intercalation material to enter the graphite material to form intercalated graphite oxide bubbles formed by intercalating the graphite edge, and intercalating the cleavage graphite, washing the cleavage product, removing the electrolyte solution, and drying to obtain high-quality graphene powder. USE - The method is useful for preparing high quality graphene material. ADVANTAGE - The method utilizes electrolyte to intercalate graphite in peroxide generated during an electrochemical reaction, peroxide generates bubbles during the intercalation process to cleave the graphite structure, and realizes efficient cleavage of graphite and electrochemical preparation of high-quality graphene without contacting the electrode. DETAILED DESCRIPTION - Preparing high quality graphene material comprises (i) adding electrolyte solution, graphite raw material and an electrode to the electrolytic container, contacting the electrode with electrolyte solution, and physically separating the electrode from graphite raw material, (ii) applying an electric field to the electrode, and intercalating and cleavage occurs when the graphite raw material is not in contact with the electrode, where the solute of electrolyte solution comprises inorganic acid electrolyte comprising sulfuric acid, nitric acid, phosphoric acid and/or boric acid, inorganic salt electrolyte comprising sulfate, nitrate, phosphate, borate, carbonate and/or bicarbonate, and/or organic electrolyte comprising urea, formic acid, benzoic acid, acetic acid and/or acetate, and solvent of electrolyte solution comprises water and/or alcohol, electrolyte solution undergoes an electrochemical reaction to produce intercalation material peroxide, and generating electric field by the electrode drives the intercalation material to enter the graphite material to form intercalated graphite oxide bubbles formed by intercalating the graphite edge, and intercalating the cleavage graphite, and (iii) washing the cleavage product, removing the electrolyte solution, and drying to obtain high-quality graphene powder.