▎ 摘　　要

NOVELTY - Preparing layered beta -nickel hydroxide/graphene material by utilizing the induction of a surface charge involves treating the positively charged nickel hydroxide with a cationic surfactant, and adding negatively charged graphene oxide. Under the solvothermal reaction, the nickel hydroxide particles extend and grow on the surface of the sheet graphene oxide. The hydrazine hydrate after reduction is washed and dried to obtain beta -nickel hydroxide/graphene material. The nickel sulfate heptahydrate (NiSO4.7H2O) and sodium hydroxide (NaOH) are separately added to distilled water, stirred uniformly, and a green precipitate is obtained after standing. The centrifugation and repeated water washing are performed to obtain precursor Ni(OH)2.0.75H2O. The zeta potential of the precursor Ni(OH)2.0.75H2O is +10 to +15 millivolts. The improved Hummers method is performed to prepare graphene oxide, the zeta potential of obtained graphene oxide is -40 to -50 millivolts. USE - Method for preparing layered beta -nickel hydroxide/graphene material by utilizing the induction of a surface charge. ADVANTAGE - The method enables to prepare layered beta -nickel hydroxide/graphene material that has good micro morphology, uniform and stable crystal phase composition. The reaction processes can be esily controlled and by adjusting the ratio of nickel hydroxide and graphene, composite materials meeting different electrochemical needs can be prepared. DETAILED DESCRIPTION - Preparing layered beta -nickel hydroxide/graphene material by utilizing the induction of a surface charge involves treating the positively charged nickel hydroxide with a cationic surfactant, and adding negatively charged graphene oxide. Under the solvothermal reaction, the nickel hydroxide particles extend and grow on the surface of the sheet graphene oxide. The hydrazine hydrate after reduction is washed and dried to obtain beta -nickel hydroxide/graphene material. The nickel sulfate heptahydrate (NiSO4.7H2O) and sodium hydroxide (NaOH) are separately added to distilled water, stirred uniformly, and a green precipitate is obtained after standing. The centrifugation and repeated water washing are performed to obtain precursor Ni(OH)2.0.75H2O. The zeta potential of the precursor Ni(OH)2.0.75H2O is +10 to +15 millivolts. The improved Hummers method is performed to prepare graphene oxide, the zeta potential of obtained graphene oxide is -40 to -50 millivolts. The cationic surfactant is dissolved in distilled water, Ni(OH)2.0.75H2O is added, and ultrasonically dispersed for 1 hour. Then graphene oxide is added, stirred thoroughly at 10-30 degrees C and sonicated for 1 hour. The precursor nanoparticles are uniformly adsorbed and dispersed on the surface of graphene oxide, and centrifuged to obtain Ni(OH)2.0.75H2O/graphene oxide composite material. The obtained intermediate product is dispersed in dimethylformamide (DMF), and refluxed in the oil bath at 95 degrees C for 16-24 hours. During the reflux process, hydrazine hydrate is added to reduce graphene oxide to obtain graphene. The repeated centrifugation, washing and drying are performed to obtain the required product.