▎ 摘　　要

NOVELTY - A graphene-based mesoporous carbon material comprises 3.3-40 wt.% graphene. The carbon material has specific surface area of 200-1600 m2/g, pore size of 0.5 nm to 10 mu m continuous distribution, average pore diameter of 2.5-12 nm, pore volume of 0.3-1.1 ml/g, carbon content of 70-97 wt.%, carbon content based on carbon dioxide (CO2) of 85-98 wt.%, oxygen content based on CO2 of 2-15 wt.%, and compaction density of 0.8-1.3 g/ml. USE - Graphene-based mesoporous carbon material used for manufacturing supercapacitor for button cell (claimed). ADVANTAGE - The mesoporous carbon material has low cost and simple process device. Preparation method is suitable for large-scale production. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (A) preparation of mesoporous carbon material by preparing graphene suspension, cellulose suspension, and potassium hydroxide solution; mixing graphene suspension with cellulose suspension, solid-liquid separating, and drying solid to obtain graphene/cellulose intermediate; soaking graphene/cellulose intermediate in potassium hydroxide (KOH) solution, solid-liquid separating, and drying solid; heating solid; and washing, solid-liquid separating, and vacuum drying; and (B) application of mesoporous carbon material for manufacturing supercapacitor, including uniformly mixing mesoporous carbon material and PTFE binder; uniformly coating on current collector; punching into sheet; vacuum drying; coating diaphragm with two sheets and separating as positive and negative electrodes; using diaphragm to separate coated sheet into positive and negative electrode; and assembling positive and negative electrodes in electrolyte-containing button cell.