▎ 摘　　要

NOVELTY - Preparing three-dimensional graphene composite electrode involves utilizing three-dimensional porous nickel foam as matrix and subjecting porous nickel foam to chemical vapor deposition method to obtain nickel/G substrate. The thiourea and anhydrous sodium sulfate are dissolved in deionized water and uniformly stirred to obtain mixed solution. The concentration of sulfate ions in the mixed solution is 0.01-0.05 mole/L. The obtained nickel/G is immersed in mixed solution and subjected to hydrothermal reaction at 100-150 degrees C for 1-5 hours. The obtained product is washed and dried. USE - Method for preparing three-dimensional graphene composite electrode used in sodium ion battery (claimed). ADVANTAGE - The method enables to prepare three-dimensional graphene composite electrode in simple, quick and cost-effective manner that has high capacity, good circulation stability and wide range of industrial applications. DETAILED DESCRIPTION - Preparing three-dimensional graphene composite electrode involves utilizing three-dimensional porous nickel foam as matrix and subjecting porous nickel foam to chemical vapor deposition method to obtain nickel/G substrate. The thiourea and anhydrous sodium sulfate are dissolved in deionized water and uniformly stirred to obtain mixed solution. The concentration of sulfate ions in the mixed solution is 0.01-0.05 mole/L. The obtained nickel/G is immersed in mixed solution and subjected to hydrothermal reaction at 100-150 degrees C for 1-5 hours. The obtained product is washed and dried to obtain three-dimensional graphene composite electrode with nickel/G/nickel sulfide on the surface.