Lithium-sulfur battery positive electrode material based on tungsten-carbon substrate bimetallic monatomic catalyst and preparation method of lithium-sulfur battery positive electrode material

The invention relates to the technical field of lithium-sulfur batteries, in particular to a lithium-sulfur battery positive electrode material based on a tungsten-carbon substrate bimetallic monatomic catalyst and a preparation method of the lithium-sulfur battery positive electrode material. The preparation method comprises the following steps: stabilizing metal atoms Fe and Ni by using a porous tungsten carbon material to prepare a bimetallic monatomic catalyst WCx-FeNi; then sulfur (S) and WCx-FeNi are mixed and subjected to heat treatment, and an S/WCx-FeNi composite material is formed; and finally, mixing with a conductive agent and a binder to prepare the S/WCx-FeNi positive electrode material. According to the invention, a tungsten-carbon-based bimetallic monatomic catalyst WCx-FeNi material is used as a carrier of positive electrode sulfur. The material can effectively adsorb and fix lithium polysulfide, and has a strong acceleration effect on oxidation-reduction conversion kinetics of sulfur, so tha