Heteropolyacid-based nitrogen-doped carbon catalyst material, preparation method thereof and method for preparing zinc-air battery by using heteropolyacid-based nitrogen-doped carbon catalyst material

The invention relates to the technical field of catalyst preparation and application, in particular to a heteropolyacid-based nitrogen-doped carbon catalyst material, a preparation method thereof and a method for preparing a zinc air battery by adopting the heteropolyacid-based nitrogen-doped carbon catalyst material. The phosphorus molybdenum vanadium heteropoly acid is added into an ionic liquid aqueous solution for reaction, filtering, washing, drying and carbonization to obtain the heteropoly acid-based nitrogen-doped carbon catalyst material, the catalytic activity of the heteropoly acid-based nitrogen-doped carbon material is improved through the mesoporous structure and hydrophobic performance of the heteropoly acid-based nitrogen-doped carbon material, and the heteropoly acid-based nitrogen-doped carbon material is a positive electrode catalyst material with ORR and OER dual-function catalysis. In addition, the ionic liquid heteropolyacid-based positive electrode material is simple to prepare, low in