▎ 摘　　要

NOVELTY - Porous carbon composite material, prepared by stacking hydrophobic Schiff base cobalt- beta -cyclodextrin-graphene sheet layer and calcining after two hydrothermal reactions, is claimed. The hydrophobic Schiff base cobalt- beta -cyclodextrin-graphene sheet layer comprises dicyandiamide, 5-chlorosalicylaldehyde, cobalt acetate tetrahydrate, - beta -cyclodextrin and graphene oxide dispersion. The composite material has sheet structure with sheet thickness of 200-400 nm. USE - The material is useful for supercapacitors as electrode material (claimed). ADVANTAGE - The material has excellent electrochemical property and chemical stability, and charge and discharge range of 0-0.4 V and reaches specific capacity of 500-1000 F/g, when the discharge current density is 1 A/g. The method is simple and environmentally friendly; enhances the dispersibility of material.