▎ 摘　　要

NOVELTY - Diselenide molybdenum/nitrogen-doped graphene composite material comprises nitrogen-doped graphene and molybdenum diselenide nanosheets composited on the nitrogen-doped graphene sheet. USE - Used as diselenide molybdenum/nitrogen-doped graphene composite material. ADVANTAGE - The material: improves the electrochemical performance of the lithium-sulfur battery through the synergistic effect of heteroatom doping and molybdenum diselenide modification; dopes nitrogen atoms with graphene to enhance transport and exchange of substances during the charging and discharging process of the battery; improves electron transport ability of cathode surface, and utilization rate of active materials; inhibits the shuttle effect of lithium polysulfide to a specific extent; utilizes molybdenum diselenide for modification as chemical adsorption site and catalytic active site of lithium polysulfide, which catalyzes the rapid transformation of polysulfide ions; accelerates the kinetic reaction; inhibits shuttle effect; improves cycle performance of the cathode material for lithium-sulfur batteries; and has a specific layered morphology and microstructure, which further improves the effect of the composite material. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: preparing the composite material, comprising (i) dispersing the graphene dispersion liquid and molybdenum source to obtain dispersion liquid, and mixing the selenium source and liquid nitrogen source to obtain mixed solution, and (ii) mixing dispersion liquid and mixed liquid obtained in the step (i) again, performing hydrothermal reaction and calcining to obtain the finished product; and a nitrogen-doped graphene-based battery anode material.