Novel supercapacitor electrode material and preparation method and application thereof

The invention relates to the field of material chemistry research, in particular to the field of supercapacitor electrode material research and preparation, and more particularly relates to a metal composite nitrogen-doped porous graphene-like composite material, the nickel or cobalt metal nanoparticles are uniformly wrapped in the shell structure with the porous graphene-like structure. The composite material disclosed by the invention is obtained by reacting transition metal ions with 1, 2, 4-triazole-3-carboxylic acid (TCA) through a solvothermal method to synthesize a ligand, then mixing the ligand with melamine, and calcining in a tubular furnace. In a three-electrode system, the composite material not only has high specific capacitance, but also has excellent cycle performance. Through experiments, the metal composite nitrogen-doped porous graphene-like composite material prepared by the method has a very high energy density value in an asymmetric supercapacitor, and is an effective positive electrode m