▎ 摘　　要

NOVELTY - Preparing a material of elemental sulfur-rich nickel cobalt sulfide and graphene comprises (a) preparing graphene oxide solution by Hummer method, (b) dissolving nickel salt and cobalt salt or its hydrate in water to obtain nickel-cobalt salt solution B, (c) mixing solution A and solution B, ultrasonically stirring, adding the active agent, (d) adding urea to mixed solution C, (e) transferring the mixed solution D into the reaction kettle, reacting to prepare a material of graphene oxide and nickel cobalt oxide, (f) dissolving the graphene oxide and nickel-cobalt oxide material in water, adding sodium sulfide or thioacetamide, (g) annealing the material of graphene oxide and nickel cobalt sulfide to obtain a material of nickel cobalt sulfide and graphene with sulfur vacancies and (h) adding the nickel-cobalt sulfide and graphene material with sulfur vacancies, heating and stirring until the organic solution evaporates to obtain a material. USE - The material is useful for preparing a material of elemental sulfur-rich nickel cobalt sulfide and graphene. ADVANTAGE - The method solves that the anode sulfur material of the existing lithium-sulfur battery will form a soluble lithium sulfide intermediate state during the charging process, which causes serious degradation of cycle performance. DETAILED DESCRIPTION - Preparing a material of elemental sulfur-rich nickel cobalt sulfide and graphene comprises (a) preparing graphene oxide solution by Hummer method, diluting the concentration of graphene oxide solution to 0.5-5g/l to obtain solution A, (b) dissolving nickel salt and cobalt salt or its hydrate in water to obtain nickel-cobalt salt solution B, where the atomic ratio of nickel to cobalt in nickel-cobalt salt solution B is 0.25-4, (c) mixing solution A and solution B, ultrasonically stirring for 1-60 minutes, adding the active agent, stirring for 1-60 minutes to obtain mixed solution C, where the mass ratio of graphene oxide to nickel cobalt salt in mixed solution C is 0.01-10 and the concentration of active agent in mixed solution C is 0.01-10 g/l, (d) adding urea to mixed solution C, stirring for 1-60 minutes to obtain mixed liquid D, where the concentration of urea in mixed liquid D is 0.01-50g/l, (e) transferring the mixed solution D into the reaction kettle, reacting in a hydrothermal, water bath or oil bath at a temperature of 60-230 degrees C for 1-36 hours to prepare a material of graphene oxide and nickel cobalt oxide, (f) dissolving the graphene oxide and nickel-cobalt oxide material in water, adding sodium sulfide or thioacetamide, stirring for 1-60 minutes, moving into the reactor, reacting in a hydrothermal, water bath or oil bath at a temperature of 60-230 degrees C for 1-36 hours to prepare a material of graphene oxide and nickel cobalt sulfide, where the mass ratio of the material of graphene oxide and nickel cobalt oxide to sodium sulfide or thioacetamide is 0.1-10, (g) annealing the material of graphene oxide and nickel cobalt sulfide to obtain a material of nickel cobalt sulfide and graphene with sulfur vacancies and (h) dissolving elemental sulfur in an organic solution, adding the nickel-cobalt sulfide and graphene material with sulfur vacancies, heating and stirring until the organic solution evaporates to obtain a material of nickel-cobalt sulfide rich in elemental sulfur and graphene, where the mass ratio of elemental sulfur to the material of nickel cobalt sulfide with sulfur vacancies and graphene is 1-20.