▎ 摘　　要

NOVELTY - Method for preparing a positive electrode material involves preparing a first graphene film on surface of a conductive substrate using a vapor deposition method, adding the conductive substrate to a vacuum chamber, introducing sulfur vapor, attaching a layer of sulfur molecules on the surface of the first graphene film and preparing a second graphene film on the surface of the sulfur molecular layer of the conductive substrate by a vapor deposition method to obtain the product. USE - The method is useful for preparing a positive electrode material, which is useful for a lithium-sulfur secondary battery (claimed). ADVANTAGE - The method improves conductive performance of positive electrode material and energy density of lithium-sulfur battery. The positive electrode material increases service life of lithium-sulfur batteries. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a positive electrode material comprising the conductive substrate, the first graphene thin film, the sulfur molecular layer and the second graphene thin film stacked on the surface of the conductive substrate in sequence.