▎ 摘　　要

NOVELTY - A three-dimensional flower-shaped cobalt hydroxide-graphene composite material preparing method involves adding graphene oxide into de-ionized water for ultrasonic dispersion to obtain the graphene oxide dispersion, and adding cobalt acetate into de-ionized water for ultrasonic dispersion to obtain the cobalt acetate solution. The graphene oxide dispersion liquid and acetic acid cobalt solution are subjected to ultrasonic dispersion and added ammonia water to obtain the cobalt hydroxide-oxide graphene mixed solution. The cobalt hydroxide-graphene oxide mixed solution is put into high pressure hydro-thermal reaction kettle for hydro-thermal reaction, after finishing reaction, and cooled to obtain reaction solution, which is centrifuged, washed using de-ionized water and absolute ethyl alcohol and vacuum dried to obtain the finished product, where the mass ratio of oxidized graphene and cobalt acetate is 1: 100-1: 20, and the mass ratio of cobalt acetate and ammonia water is 5: 1-1: 1. USE - Method for preparing three-dimensional flower-shaped cobalt hydroxide-graphene composite material. ADVANTAGE - The method enables preparing the three-dimensional flower-shaped cobalt hydroxide-graphene composite material with better cycling stability and rate performance in simple, reliable, cost-effective and eco-friendly manner. DETAILED DESCRIPTION - A three-dimensional flower-shaped cobalt hydroxide-graphene composite material preparing method involves adding graphene oxide into de-ionized water according to mass volume ratio of 1:5-3:2 mg/mL for ultrasonic dispersion to obtain the graphene oxide dispersion, and adding cobalt acetate into de-ionized water according to mass volume ratio of 10:1-40:1 mg/mL for ultrasonic dispersion to obtain the cobalt acetate solution. The graphene oxide dispersion liquid and acetic acid cobalt solution are subjected to ultrasonic dispersion and added ammonia water to obtain the cobalt hydroxide-oxide graphene mixed solution. The cobalt hydroxide-graphene oxide mixed solution is put into high pressure hydro-thermal reaction kettle for hydro-thermal reaction, after finishing reaction, and naturally cooled to room temperature to obtain reaction solution, which is centrifuged, washed using de-ionized water and absolute ethyl alcohol for several times till the effluent liquid is neutral and vacuum dried to obtain the finished product, where the mass ratio of oxidized graphene and cobalt acetate is 1: 100-1: 20, and the mass ratio of cobalt acetate and ammonia water is 5: 1-1: 1. An INDEPENDENT CLAIM is also included for a three-dimensional flower-shaped cobalt hydroxide-graphene composite material.