▎ 摘　　要

NOVELTY - Preparing graphene comprises (i) taking graphene sheet structure containing carbon material, electrolyte solution, auxiliary agent and metallic lithium, mixing evenly to obtain reaction slurry, where the electrolyte solution comprises solute and solvent, (ii) treating the reaction slurry by disturbance process, peeling off the graphite sheet, and preparing graphene material slurry, and (iii) soaking the slurry in lithium carbonate solution, then cleaning, and drying to obtain the finished product. USE - The graphene is useful in lithium ion battery cathode conductive agent (claimed). ADVANTAGE - The graphene: has low cost, high efficiency and large specific surface area; reduces the battery internal resistance; and improves recycling performance. DETAILED DESCRIPTION - Preparing graphene comprises (i) taking graphene sheet structure containing carbon material, electrolyte solution, auxiliary agent and metallic lithium, mixing evenly to obtain reaction slurry, where the electrolyte solution comprises solute and solvent, the solute is lithium salt, sodium salt, magnesium salt or calcium salt, the solvent is chain-shape carbonate and/or cyclic carbonate, the auxiliary agent is formic acid, acetic acid, ferric chloride and/or nitrate, and the mass ratio of graphene sheet structure containing carbon material, electrolyte solution, auxiliary agent and metallic lithium is 1-50:50-100:1:1-5, (ii) treating the reaction slurry by disturbance process, peeling off the graphite sheet, and preparing graphene material slurry, and (iii) soaking the slurry in lithium carbonate solution, then cleaning, and drying to obtain the finished product. An INDEPENDENT CLAIM is also included for the graphene prepared by the above mentioned method;