▎ 摘　　要

NOVELTY - Preparation of nitrogen-doped carbon-coated porous two-dimensional graphene oxide composite involves mixing graphene oxide with aqueous solution, adding monosaccharide, disaccharide or soluble polysaccharide, and organic amine, stirring until it forms homogeneous dispersion, carrying out hydrothermal reaction, obtaining a mother liquor, mixing with activating reagent, heating, reacting under inert gas, and dissolving activating reagent and unreacted other byproduct with solvent. The activating reagent is chosen from potassium hydroxide, sodium hydroxide and zinc chloride. USE - Preparation of nitrogen-doped carbon-coated porous two-dimensional graphene oxide composite used for supercapacitor. ADVANTAGE - The method provides nitrogen-doped carbon-coated porous two-dimensional graphene oxide composite having high conductivity and surface area. DETAILED DESCRIPTION - Preparation of nitrogen-doped carbon-coated porous two-dimensional graphene oxide composite involves mixing graphene oxide with aqueous solution, adding monosaccharide, disaccharide or soluble polysaccharide, and organic amine, stirring until it forms homogeneous dispersion, carrying out hydrothermal reaction, obtaining a mother liquor, mixing with activating reagent, heating, reacting under inert gas, and dissolving activating reagent and unreacted other byproduct with solvent. The activating reagent is chosen from potassium hydroxide, sodium hydroxide and zinc chloride. An INDEPENDENT CLAIM is included for usage method of nitrogen-doped carbon-coated porous two-dimensional graphene oxide composite, which involves using nitrogen-doped carbon-coated porous two-dimensional graphene oxide composite for super capacitor.