▎ 摘　　要

NOVELTY - The preparation method of three-dimensional nickel disulfide nanoparticle-containing graphene composite electrode involves (i) using three-dimensional porous nickel foam as a substrate, chemically vapor depositing the graphene directly on substrate to obtain nickel/graphene, (ii) dissolving thioacetamide and anhydrous sodium sulfate in deionized water, stirring uniformly to obtain a mixed solution, adding sulfate to mixed solution, (iii) immersing nickel/graphene in mixed solution, hydrothermally reacting, washing, and drying to obtain nickel/graphene/nickel sulfide catalyst. USE - Preparation of three-dimensional nickel disulfide nanoparticle-containing graphene composite electrode used in sodium ion battery (claimed). ADVANTAGE - The method enables the preparation of three-dimensional nickel disulfide nanoparticle-containing graphene composite electrode having high capacity and excellent cycle stability, in a short cycle by simple process at low cost with less energy. DETAILED DESCRIPTION - The preparation method of three-dimensional nickel disulfide nanoparticle-containing graphene composite electrode involves (i) using three-dimensional porous nickel foam as a substrate, chemically vapor depositing the graphene directly on substrate to obtain nickel/graphene, (ii) dissolving thioacetamide and anhydrous sodium sulfate in deionized water, stirring uniformly to obtain a mixed solution, adding 0.01-0.05 mol/l sulfate to mixed solution, (iii) immersing nickel/graphene in mixed solution, hydrothermally reacting at 100-150 degrees C for 1-5 hours, washing, and drying to obtain nickel/graphene/nickel sulfide catalyst. The molar ratio of thioacetamide and anhydrous sodium sulfate is 0.2-1.0.