▎ 摘　　要

NOVELTY - Method for preparing nickel-doped molybdenum disulfide/graphene three-dimensional composite material, involves (a) preparing graphene oxide colloidal solution using improved Hummer's method to obtain graphene oxide, dissolving obtained graphene oxide in pure water having concentration of 1.5 g/l to obtain graphene oxide colloidal solution, (b) adding anhydrous oxalic acid and thiourea to graphene oxide colloidal solution, and uniformly stirring until completely dissolving, adding molybdenum salt and nickel salt, and uniformly stirring, transferring precursor solution to reaction kettle, and performing constant-temperature heating, and (c) repeatedly leaching obtained nickel-doped molybdenum disulfide/graphene aerogel column with pure water for removing soluble impurities, and preparing the sandwich-type structure nickel-doped molybdenum disulfide/graphene three-dimensional composite material using vacuum freeze-drying method. USE - The method is used for preparing nickel-doped molybdenum disulfide/graphene three-dimensional composite material useful in lithium-sulfur battery cathode material (claimed), and used as lithium-sulfur battery sulfur host cathode material and catalyst. ADVANTAGE - The method ensures mild conditions and low equipment requirements, and is simple, environmentally-friendly, economical and convenient for industrial production. DETAILED DESCRIPTION - Method for preparing nickel-doped molybdenum disulfide/graphene three-dimensional composite material, involves (a) preparing graphene oxide colloidal solution using improved Hummer's method to obtain graphene oxide, dissolving obtained graphene oxide in pure water having concentration of 1.5 g/l to obtain graphene oxide colloidal solution, (b) adding anhydrous oxalic acid and thiourea to graphene oxide colloidal solution, and uniformly stirring until completely dissolving, adding molybdenum salt and nickel salt, and uniformly stirring for 1 -2 minutes to obtain precursor solution, transferring obtained precursor solution to reaction kettle, and performing constant-temperature heating in oven at 180 degrees C for 36 hours to obtain nickel-doped molybdenum disulfide/graphene aerogel column, and (c) repeatedly leaching obtained nickel-doped molybdenum disulfide/graphene aerogel column with pure water for removing soluble impurities, and preparing the sandwich-type structure nickel-doped molybdenum disulfide/graphene three-dimensional composite material using vacuum freeze-drying method.