▎ 摘　　要

NOVELTY - Preparation of graphene includes attaching carbon material-containing working layer into working current collector to obtain working electrode; attaching power source material-containing auxiliary layer into secondary current collector to obtain auxiliary electrode; assembling working electrode and auxiliary electrode to obtain pre-reaction member; disposing with graphite intercalation and/or peel functional component-containing electrolyte to carry out ion conduction, performing electronic conduction, and peeling off graphite sheet; and taking out, removing impurities, and drying. USE - Method for preparation of graphene used for energy storage device, thermal conductivity device and electrically conductive device (all claimed). ADVANTAGE - The method is suitable for large scale production and has low cost. DETAILED DESCRIPTION - Preparation of graphene comprises: (A) attaching carbon material-containing working layer into working current collector to obtain working electrode; (B) attaching power source material-containing auxiliary layer into secondary current collector to obtain auxiliary electrode; (C) assembling working electrode and auxiliary electrode to obtain pre-reaction member; (D) disposing with graphite intercalation and/or peel functional component-containing electrolyte to carry out ion conduction between working layer and the auxiliary layer, performing electronic conduction, and peeling off graphite sheet to obtain graphene pre-reaction body; and (E) taking out, removing impurities to obtain graphene slurry, and drying into powder. The step D also contains 0-20 wt.% surfactant.