▎ 摘　　要

NOVELTY - Preparing metal sulfide/graphene involves adding graphene oxide in the ionic liquid, ultrasonically dispersing to obtain graphene oxide dispersion, adding the metal source to the graphene oxide dispersion, continuously ultrasonically dispersing to obtain the precursor. The sulfur source is added into the precursor to react at 150-220 degrees C for 8-20 hours, then the obtained product is washed, dried and calcined in tubular furnace in protection of inert atmosphere at 350-550 degrees C for 3-6 hours to obtain the metal sulfide/graphene. USE - Method for preparing metal sulfide/graphene for sodium ion battery (claimed). ADVANTAGE - The method enables to prepare metal sulfide/graphene which is easy to process in a simple and cost-effective manner. It has high conductivity, good structural stability and higher capacity. DETAILED DESCRIPTION - Preparing metal sulfide/graphene involves adding graphene oxide in the ionic liquid, ultrasonically dispersing to obtain graphene oxide dispersion, adding the metal source to the graphene oxide dispersion, continuously ultrasonically dispersing to obtain the precursor. The sulfur source is added into the precursor to react at 150-220 degrees C for 8-20 hours, then the obtained product is washed, dried and calcined in tubular furnace in protection of inert atmosphere at 350-550 degrees C for 3-6 hours to obtain the metal sulfide/graphene, where the concentration of graphene oxide dispersion is 1-12 milligram/milliliter and the mass ratio of the metal source to the graphite oxide is 4:1-10:1.