▎ 摘　　要

NOVELTY - Preparing graphene-activated coal slurry involves mixing graphene oxide powder material with solvent and then adding the mixed material in ball-milling tank to perform ball-milling process and to obtain powder A. The graphene oxide powder material is mixed with powder A and then added into ball-milling tank to perform ball-milling process and to obtain powder B. The powder B is mixed with activated carbon powder material and polymer colloidal mixed material and then the mixed material is dried to obtain powder C. The powder is stirred with a solvent to obtain the desired product. USE - Method for preparing graphene-activated coal slurry used in preparation of supercapacitor (claimed). ADVANTAGE - The method enables to prepare graphene-activated coal slurry with high dispersibility and solid content and practical significance.