▎ 摘　　要

NOVELTY - A sulfur composite cathode material comprises raw materials including 10-50 wt.% graphene, 50-90 wt.% elemental sulfur and a 10-50 wt.% carbon nanotube, where the total content of the raw materials is 100%. USE - Sulfur composite cathode material for manufacturing a lithium secondary battery (claimed). ADVANTAGE - The sulfur composite cathode material provides a lithium secondary battery having better cycle performance and capacity. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following: (1) a method for preparing a sulfur composite cathode material, which involves performing mixed ball-milling on sulfur and carbon nanotube, heating the obtained material under the protection of inert gas to obtain a sulfur-carbon nanotube composite material, performing ultrasonic dispersion on the sulfur-carbon nanotube composite material in an alcohol/water liquid phase system, adding an oxidized graphene solution, stirring, ultrasonic dispersing, stirred heating, filtering and drying the obtained product to obtain a finished product (2) a lithium secondary battery comprising a positive electrode active material, a negative electrode, electrolyte and a membrane, where the anode active material is a sulfur composite anode material, the cathode metal is lithium or lithium-containing metal alloy, and the electrolyte is an organic liquid, ionic liquid or solid state electrolyte.