▎ 摘　　要

NOVELTY - Manufacture of three-dimensional porous graphene-loaded carbon-coated lithium sulfide cathode material involves dispersing graphene oxide in water, magnetically-stirring, ultrasonically-treating to obtain graphene oxide solution, adding reducing agent to the solution to obtain brown solution, transferring the brown solution into autoclave, hydrothermally-reacting, cooling to obtain a three-dimensional porous graphene solution, mixing three-dimensional porous graphene solution, lithium sulfate and carbon material, stirring, freeze-drying to obtain precursor, and calcining the precursor. USE - Manufacture of three-dimensional porous graphene-loaded carbon-coated lithium sulfide material used for cathode of battery (all claimed). ADVANTAGE - The method enables efficient manufacture of three-dimensional porous graphene-loaded carbon-coated lithium sulfide material with high productivity and excellent electrical properties, by simple method. DETAILED DESCRIPTION - Manufacture of three-dimensional porous graphene-loaded carbon-coated lithium sulfide cathode material involves dispersing graphene oxide in water, magnetically-stirring, ultrasonically-treating to obtain graphene oxide solution, adding a reducing agent to the solution to obtain a brown solution, transferring the brown solution into the autoclave, sealing the autoclave, hydrothermally-reacting at 120-200 degrees C for 4-12 hours, cooling to obtain a three-dimensional porous graphene solution, mixing three-dimensional porous graphene solution, lithium sulfate and carbon material, stirring, freeze-drying to obtain a precursor, and calcining the precursor at 800-1000 degrees C for 2-12 hours.