Preparation and application of NiS < 2 >-Co-N-C/CNF zinc-air battery catalyst with dendritic structure

The invention discloses preparation and application of a NiS < 2 > (at) Co-N-C/CNF zinc-air battery catalyst with a dendritic structure. The preparation method comprises the following steps: firstly, synthesizing Ni (OH) 2 nanosheets through a simple hydrothermal reaction, and performing low-temperature purging on Ni (OH) 2 serving as a precursor and a sulfur source in a tubular furnace to synthesize NiS2 nanosheets. The preparation method comprises the following steps: preparing a nano-fiber membrane by using an electrostatic spinning technology, growing MOF on the nano-fiber membrane in situ, carbonizing the MOF in the presence of ZiF-67 in a nitrogen atmosphere to form Co-N-C/CNF. And finally, carrying out a simple hydrothermal compounding strategy on the NiS2 nanosheet and Co-N-C/CNF according to a ratio of 0.3: 1, so as to obtain the dendritic NiS2-coated Co-N-C/CNF catalyst. The prepared catalyst has the ORR half-wave potential close to that of commercial Pt/C and the overpotential superior to that of I