Positive and negative electrode materials of lithium-sulfur battery as well as preparation method and application of positive and negative electrode materials

The invention discloses preparation methods of ultrathin nanoflower sheet cerium-doped zinc oxide coated carbon nanofibers and nickel crystal lithium-sulfur battery positive and negative electrode materials embedded into the surface of cerium-doped zinc oxide, and belongs to the technical field of preparation of lithium-sulfur battery total battery materials. The ultrathin nano flower-sheet Ce-ZnO prepared by the method can load more sulfur/lithium, the wettability of the electrolyte is effectively improved, and the problems of volume expansion and shrinkage of positive and negative electrode materials are effectively solved. In addition, Ce doping can improve the conductivity of ZnO, and Ni crystals provide coupling electrons to accelerate the redox reaction of polysulfide. Through coordination of respective advantages, the complex can mutually promote the adsorption-diffusion-conversion process of polysulfide, and has a synergistic enhancement effect on inhibition of shuttling of lithium polysulfide and gro