▎ 摘　　要

NOVELTY - Preparing nickel-nickel molybdenum oxide/graphene composite material comprises (1) ultrasonically dispersing graphene oxide in deionized water to obtain graphene oxide dispersion, and then dissolving nickel source in graphene oxide dispersion, and stirring to obtain solution A, (2) preparing deionized aqueous solution of potassium octacyanomolybdate(IV) to obtain solution B, (3) adding solution B to solution A, uniformly stirring, allowing to stand, centrifuging the resulting precipitate, washing using deionized water and ethanol, and vacuum drying to obtain nickel octacyanomolybdate(IV)/graphene oxide precursor, and (4) placing nickel octacyanomolybdate(IV)/graphene oxide precursor into a porcelain boat, placing it in a tube furnace, pyrolyzing for 10-30 minutes, decomposing nickel octacyanomolybdate(IV) and reducing graphene oxide to graphene, then reducing the temperature to 200-300 degrees C, removing the inert gas, introducing air, and oxidizing for 20-30 minutes. USE - The composite material is useful for cathode of lithium ion battery (claimed). ADVANTAGE - The composite material: has excellent lithium storage performance and potential application prospects; is simple and feasible; has good compound effect; and is suitable for large-scale production. DETAILED DESCRIPTION - Preparing nickel-nickel molybdenum oxide/graphene composite material comprises (1) ultrasonically dispersing graphene oxide in deionized water to obtain graphene oxide dispersion, and then dissolving nickel source in graphene oxide dispersion, and stirring to obtain solution A, where the mass-volume ratio of the graphene oxide, nickel source and deionized water is 30-120 mg:60-240 mg:15-60 ml, and the nickel source is nickel chloride hexahydrate or nickel acetate tetrahydrate, (2) preparing deionized aqueous solution of potassium octacyanomolybdate(IV) to obtain solution B, where the mass-volume ratio of the potassium octacyanomolybdate(IV) and deionized water is 62-248 mg:15-60 ml, (3) adding solution B to solution A, keep the molar ratio of potassium octacyanomolybdate(IV) and the nickel source at 1:2, uniformly stirring, allowing to stand, centrifuging the resulting precipitate, washing using deionized water and ethanol, and vacuum drying to obtain nickel octacyanomolybdate(IV)/graphene oxide precursor, and (4) placing nickel octacyanomolybdate(IV)/graphene oxide precursor into a porcelain boat, placing it in a tube furnace, programing the temperature to 700-800 degrees C in an inert atmosphere, pyrolyzing for 10-30 minutes, decomposing nickel octacyanomolybdate(IV) and reducing graphene oxide to graphene, reducing the temperature to 200-300 degrees C, removing the inert gas, introducing air, and oxidizing for 20-30 minutes.