Nanosheet-rich Co/CoO/Co3O4 porous composite material as well as preparation method and application thereof

The invention discloses a Co/CoO/Co3O4 porous composite material rich in nanosheets, a preparation method of the Co/CoO/Co3O4 porous composite material and application of the Co/CoO/Co3O4 porous composite material as an electrode material of a lithium ion battery. The preparation method comprises the following steps: by taking water as a solvent, cobalt acetate as a cobalt source, ethylenediaminetetraacetic acid and ethylene glycol as fuels and nitric acid as an oxidizing agent, stirring at a constant temperature at a certain temperature to obtain a precursor solution, then heating the solution to burn to obtain precursor powder, and annealing the precursor by utilizing a simple heat treatment process to obtain a final product. The prepared nanosheet-rich Co/CoO/Co3O4 porous composite material has good cycle performance as a lithium ion battery negative electrode material. The nanosheet-rich Co/CoO/Co3O4 porous composite material is simple and convenient in preparation process and low in cost, and has a good