Zinc-nitrogen modified dual-carbon catalytic material, preparation method thereof and application of zinc-nitrogen modified dual-carbon catalytic material in zinc-air battery

The invention discloses a zinc-nitrogen modified dual-carbon catalytic material, a preparation method thereof and an application of the zinc-nitrogen modified dual-carbon catalytic material in a zinc-air battery. The preparation method comprises the following steps: synthesizing a metal framework ZIF-8 from dimethylimidazole and a zinc salt as raw materials, carrying out first heat treatment on the metal framework ZIF-8 in a protective atmosphere to obtain a zinc-modified porous carbon material, carrying out ball milling mixing on the zinc-modified porous carbon material, a carbohydrate compound and a nitrogen source compound, carrying out second heat treatment in a protective atmosphere, and obtaining the zinc-nitrogen modified dual-carbon catalytic material. The catalytic material has zinc and nitrogen dual modification, is rich in defect and porous structure, is good in conductivity and has a 3D network structure, and when the catalytic material is applied to a zinc-air battery, high power density and spec