▎ 摘　　要

NOVELTY - Lithium-sulfur battery positive electrode material comprises a conductive carbon-coated graphite-like carbon nitride heterojunction material and sulfur, and the graphite-like carbon nitride heterojunction material in the conductive carbon coating graphite-like carbon nitride heterojunction material is formed by the connection of two different carbon nitride (g-C3N4) sheets. USE - Lithium-sulfur battery positive electrode material. ADVANTAGE - The lithium-sulfur battery positive electrode material effectively inhibits sulfur volume expansion, shuttling of polysulfide and accelerating of the polysulfide to improve the electrochemical performance of the electrode. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing lithium sulfur battery positive electrode material which involves: i. taking the two nitrogen-containing compounds as raw materials of different g-C3N4layer, uniformly dispersing into the deionized water, fully stirring and mixing uniformly, then adding conductive carbon, continuously stirring to obtain mixed solution, crushing dry grinding to obtain powder for further use; ii. calcining the powder obtained at high temperature under the inert atmosphere to obtain the conductive carbon coating graphite-phase carbon nitride heterojunction material; and iii. loading the elemental sulfur on the conductive carbon coating graphite-phase carbon nitride heterojunction material by vacuum melting diffusion method to obtain the lithium sulfur battery positive electrode material.