▎ 摘　　要

NOVELTY - The preparation method of antimony pentasulfide nanoparticles and three-dimensional graphene composite material involves: (1) preparing graphene oxide by Hummers method, and then configuring into dispersion liquid to desired concentration according to experimental requirement; and (2) preparing sodium thioantimonate nonahydrate into a solution, mixing 5.9-15.8 ml obtained solution with graphene oxide dispersion liquid obtained in step (1) to form a uniform mixed solution, and dripping hydrochloric acid to mixed solution. USE - The method is useful for preparing antimony pentasulfide nanoparticles and three-dimensional graphene composite material, which are useful for sodium ion secondary battery (claimed). ADVANTAGE - The method enables economical preparation of antimony pentasulfide nanoparticles with self-supporting characteristic and three-dimensional graphene composite material. The antimony pentasulfide nanoparticles and three-dimensional graphene composite material prepared by the method can improve the capacity and energy density of the battery. DETAILED DESCRIPTION - The preparation method of antimony pentasulfide nanoparticles and three-dimensional graphene composite material involves: (1) preparing graphene oxide by Hummers method, and then configuring into dispersion liquid to desired concentration according to experimental requirement; (2) preparing sodium thioantimonate nonahydrate into a solution with concentration of 0.01 mole/l, mixing 5.9-15.8 ml obtained solution with graphene oxide dispersion liquid obtained in step (1) with concentration of 0.8 ml to form a uniform mixed solution, dripping hydrochloric acid to mixed solution under magnetic stirring to prepare antimony pentasulfide nanoparticles, which are uniformly grown on the surface of graphene sheet layer; and (3) transferring the solution obtained in step (2) to 50 ml Teflon (RTM: PTFE) tube, sealing with a sealed stainless steel reaction kettle, heating the reaction at 90-120 degrees C for 6-10 hours, freezing and drying graphene foam composite material formed by reaction in freeze-dryer to obtain product.