▎ 摘　　要

NOVELTY - Lithium-sulfur battery cathode material based on tungsten-carbon substrate bimetallic single-atom catalyst comprises tungsten carbide-iron-nickel (WCx-FeNi), sulfur, conductive agent and binder. The WCx-FeNi is made of tungsten-carbon substrate loaded with iron and nickel bimetals. USE - Used as lithium-sulfur battery cathode material based on tungsten-carbon substrate bimetallic single-atom catalyst. ADVANTAGE - The method uses the tungsten-carbon substrate bimetallic single-atom catalyst WCx-FeNi material as the carrier of cathode sulfur. The material can efficiently adsorb and immobilize lithium polysulfides, has strong acceleration effect on the redox conversion kinetics of sulfur, efficiently inhibiting the shuttle effect of lithium-sulfur batteries, and the lithium-sulfur battery based on S/WCx-FeNi cathode material exhibits excellent cycle performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the cathode material, comprising (S1) adding iron salt and nickel salt to dopamine solution with pH 1-3, then adding tungstate solution to the obtained mixed solution to make DA-W-FeNi precursor solid product, and carrying out high-temperature carbonization on the solid product in an inert atmosphere to obtain WCx-FeNi, and (S2) heat-treating sulfur powder and WCx-FeNi powder in an inert atmosphere to form sulfur/WCx-FeNi composite material, then using N-methylpyrrolidone (NMP) as solvent to make sulfur/WCx-FeNi composite material, conductive agent and binder into electrode slurry, and coating the electrode slurry on the aluminum foil to prepare the lithium-sulfur battery cathode material based on the tungsten-carbon substrate bimetallic single-atom catalyst.