▎ 摘　　要

NOVELTY - Preparing nickel oxide/graphene nano-composite material comprises e.g. dispersing graphite oxide in water ultrasonically to obtain graphene oxide solution, adding sulfuric acid into the solution, mixing to obtain mixed liquid, introducing the mixed liquid into the reaction kettle, reacting, taking out, washing and obtaining three-dimensional histogram reduced graphene oxide, dissolving nickel salt and precipitant in water to obtain mixed solution, adding the three-dimensional histogram reduced graphene oxide into the solution, soaking, reacting, roasting and cooling. USE - The method is useful for preparing nickel oxide/graphene nano-composite material (claimed). ADVANTAGE - The method solves agglomeration problem for graphene and nickel oxide, solves cathode material poor stability and poor conductivity problems, thus reaches the purpose of improving performance of lithium battery, the material used in lithium ion battery cathode material, has good circulation stability and high specific energy density. DETAILED DESCRIPTION - Preparing nickel oxide/graphene nano-composite material comprises (i) dispersing graphite oxide in water ultrasonically to obtain graphene oxide solution, adding sulfuric acid into the solution, ultrasonically mixing to obtain mixed liquid, introducing the mixed liquid into the reaction kettle, reacting at 160-260 degrees C for 18-30 hours, preferably reacting at 190-220 degrees C for 20-24 hours, taking out, washing and obtaining three-dimensional histogram of the reduced graphene oxide, (ii) dissolving nickel salt and precipitant in water to obtain mixed solution, adding the three-dimensional histogram reduced graphene oxide into the solution, soaking at 3-60 degrees C for 1 day, preferably at 10-30 degrees C for 1-2 days, transferring the mixed solution and three-dimensional histogram reduced graphene oxide into hydrothermal kettle, reacting at 100-200 degrees C for 18-30 hours, preferably at 180-200 degrees C for 20-24 hours, washing and drying to obtain precursor, (iii) roasting the precursor composite at 200-500 degrees C for 0.5-5 hours, preferably at 300-400 degrees C for 1-3 hours and naturally cooling to room temperature to obtain nickel oxide/graphene nano-composite material. INDEPENDENT CLAIMS are also included for: (1) lithium ion battery cathode, comprising nickel oxide/graphene nano-composite material; and (2) lithium ion battery, comprising lithium ion battery cathode made of nickel oxide/graphene nano-composite material.