▎ 摘　　要

NOVELTY - Preparing lithium-ion battery cathode material nickel oxide/three-dimensional graphene composite material comprises e.g. pre-treating polymer, washing, drying, adding pretreated polymer into nickel salt solution, filtering, removing filtrate, exchanging obtained nickel ion in polymer, adding pore-forming agent, adding deionized water, heating obtained material under protective atmosphere at rate of 1-10 degrees C/minute at 400-1000 degrees C for 1-5 hours, washing obtained material with deionized water, removing excess impurities, mixing with concentration of nickel salt and sulfate solution. USE - The method is useful for preparing lithium-ion battery cathode material nickel oxide/three-dimensional graphene composite material. ADVANTAGE - The material has excellent multiplying power property and cyclical stability, large specific surface, high yield and simple process; increases conductivity and structural stability; and is suitable for large scale industrial production. DETAILED DESCRIPTION - Preparing lithium-ion battery cathode material nickel oxide/three-dimensional graphene composite material comprises (i) pre-treating polymer has ion exchange capacity of washing and drying, (ii) adding pretreated polymer into 0.1-2 mol/l nickel salt solution, magnetically stirring for 0.1-12 hours, filtering, and removing filtrate, (iii) exchanging nickel ion obtained in step (ii) in polymer in mass ratio of 1:1-5, adding pore-forming agent, then adding deionized water to make pore forming agent dissolve, stirring and mixing, and drying, (iv) heating material obtained in step (iii) under protective atmosphere at rate of 1-10 degrees C/minute at 400-1000 degrees C for 1-5 hours, (v) washing material obtained in step (iv) with deionized water for many times, removing excess impurities, filtering, and drying to obtain nano-nickel metal particle/three-dimensional graphene composite material, (vi) mixing nano-nickel metal particle/three-dimensional graphene composite obtained in step (v) with concentration of nickel salt and sulfate solution, then transferring to reaction kettle, and heating reaction for period of time to obtain nickel hydroxy sulfate/three-dimensional graphene precursor, and (vii) placing prepared nickel hydroxy sulfate/three-dimensional graphene precursor in tube furnace, passing nitrogen gas, heating at 200-1000 degrees C for 1-10 hours at rate of 1-10 degrees C/minute, shielding gas flow rate of 0.1-1 sccm/minute, and naturally cooling to obtain nickel oxide/three-dimensional graphene composite material.