MOFs derivative PBA@Co-Ni-S composite material, and preparation method and application thereof

The invention discloses an MOFs derivative PBA@Co-Ni-S composite material. A room temperature precipitation method is adopted to form a nanocube with uniform size, then a standing adsorption method is adopted to load MOF nanosheets on the surface of the cube, and finally, a solvothermal method is adopted to sulfurize and activate the MOF nanosheets to realize rapid and reversible Faraday reaction, so that the electrochemical performance of EC is improved. Fe-Co-PBA provides main morphology, and the structure is relatively stable; the surface of Fe-Co-PBA is subsequently coated with MOF, and the specific surface area of the whole material is increased through the morphology of the nanosheet; and then vulcanization treatment is performed, so that the electronic structure of the outer-layer MOF is further regulated and controlled, and the performance is improved. The preparation method comprises the following steps: 1, preparing the Fe-Co-PBA; 2, loading the MOF nanosheets on the outer layer of the Fe-Co-PBA; an