▎ 摘　　要

NOVELTY - Simple hydrothermal synthesis of beta -phase nickel hydroxide/graphene nano composite material, comprises (a) preparing an ultrasonic solution, adding nickel(II) sulfate hexahydrate to the ultrasonic solution, stirring until completely dissolved, adding sodium hydroxide solution dropwise and continuously stirring to react to obtain a mixed solution; (b) heating; (c) cooling the reaction vessel to room temperature, centrifuging multiple times with deionized water and freezing and drying to obtain beta -phase nickel hydroxide/graphene nanocomposite agglomerate; and (d) coagulating the step (c) product, mixing a conductive agent acetylene black and 60 wt.% polytetrafluoroethylene concentrating as adhesive, adding absolute ethanol solution, stirring, subjecting to ultrasound, coating beta -phase nickel hydroxide/graphene composite material powder suspension slurry to the pretreated clean foamed nickel, rolling and uniformly coating, drying and curing the electrode active substance. USE - The method is useful for simple hydrothermal synthesis of beta -phase nickel hydroxide/graphene nano composite material. ADVANTAGE - The method improves the electrical conductivity of the composite material; prevents the agglomeration of nano nickel(II) hydroxide particles and the re-stacking of graphene sheets having a mesoporous structure and a large specific surface area; has increased utilization rate of active materials and solid-liquid contact area, thus increases the electrochemical reaction rate of the active material and improves the electrochemical performance of the composite material. DETAILED DESCRIPTION - Simple hydrothermal synthesis of beta -phase nickel hydroxide/graphene nano composite material, comprises (a) adding graphene oxide into deionized water and subjecting to ultrasonication to obtain an ultrasonic solution, adding nickel(II) sulfate hexahydrate to the ultrasonic solution, stirring until completely dissolved, adding sodium hydroxide solution dropwise and continuously stirring to react to obtain a mixed solution; (b) transferring the clear solution into a Teflon lined stainless steel high pressure sealed reaction kettle to react and heating in an oven; (c) cooling the reaction vessel to room temperature, collecting the obtained sample from the reaction vessel, centrifuging multiple times with deionized water and freezing and drying to obtain beta -phase nickel hydroxide/graphene nanocomposite agglomerate; and (d) coagulating the step (c) product, mixing a conductive agent acetylene black and 60 wt.% polytetrafluoroethylene concentrating as adhesive according to mass ratio of 8:1:1, adding suitable amount of absolute ethanol solution, stirring uniformly, subjecting to ultrasound to obtain a uniformly dispersed diluted beta -phase nickel hydroxide/graphene composite material powder suspension slurry, coating the beta -phase nickel hydroxide/graphene composite material powder suspension slurry to the pretreated clean foamed nickel, rolling and uniformly coating, and drying in a vacuum drying box and curing the electrode active substance.