▎ 摘　　要

NOVELTY - Preparation of energy density type alkene sulfur anode composite material, comprises (1) adding graphite powder, sodium nitrate and potassium permanganate into concentrated sulfuric acid at 0-20?oC, stirring to slowly raise the temperature; (2) heating the solution to more than 30?oC, adding deionized water and reducing agent, filtering, washing and drying the oxidized graphite; (3) adding into deionized water for ultrasonic treatment, obtaining dispersion A, raising temperature to 80-90?oC, adding hydrazine hydrate, reacting, filtering, washing and drying, obtaining oxidized graphene; (4) ultrasonically processing the oxidized graphene after being added with deionized water to obtain dispersion liquid B; and adding inorganic sulfide into deionized water, stirring and dissolving to obtain sulfur solution C; and (5) mixing dispersion B with sulfur solution C until reaction is complete, adding diluted acid to adjust the solution to acidic, filtering, and drying. USE - Preparation method of energy density type alkene sulfur anode composite material used for lithium ion battery. ADVANTAGE - The method provides graphene sulfur composite material with high energy density, high coulomb efficiency, high capacity, high performance index, and large endurance, and can be directly applied to all kinds of new energy electric lithium sulfur battery product such as automobile and portable electronic product.