▎ 摘　　要

NOVELTY - Method for preparing graphene-molybdenum(OH) 2/C-N supercapacitor composite material involves dispersing polystyrene microspheres with carboxylic acid groups in a solvent to obtain a polysulfonate dispersion, adding metal salt and imidazole compound to the PS dispersion to prepare a polystyrene acid/ZIF, where the mass ratio of M-N material, graphene and sulfur-containing compound is 1:(0.25-0.5):(4-8), carbonizing the PS/zif to obtain M-C- N material, and subjecting the M-CO-N materials, graphene-containing compounds, and sulfonated compounds to solvent thermal reaction to obtain graphene-MSO-4/C -N material. The graphene-M-NO-2 /C-NO material is soaked in an alkaline solution to obtain the graphene-MO-2/C-N super capacitor composite material. USE - Preparation method of graphene-m-n super capacitor composite material used in electrochemical energy storage technology. Can also be used in energy storage device. ADVANTAGE - The method: solves the problem that the hydroxide is easy to agglomerate to cause bad electrochemical performance in the prior art. The method can improve the capacitance and stability of the electrode material, the specific capacitance at 2A/g current density can reach 295.2-985.4F/g.