▎ 摘　　要

NOVELTY - A graphene salt and carbon nanotube composite modified separator preparing method involves ultrasonically dispersing graphene oxide powder in a solvent to obtain a dispersion, adding alkali to adjust the pH of the dispersion to 10-14, and adding an anionic organic salt, and ultrasonically reacting for 0.5-4 hours, where the anionic organic salt is chloroacetate, chloropropionate, chlorobutyrate, chlorobenzoate, chlorophenylacetate, chloroethylsulfonate, chlorobutylsulfonate, chlorobenzenesulfonate, chlorobenzenesulfinate, and adding ethanol to centrifuge to obtain a solid substance, washing the solid substance with a washing solution, centrifuging and vacuum drying to obtain salted graphene. The salted graphene is added to the solvent, the carbon nanotubes and the binder are added, the container is sealed, and ultrasonically vibrated to obtain a dispersion liquid. The obtained dispersion liquid is suction-filtered, dried and cut on a separator to obtain the finished product. USE - Method for preparing a graphene salt and carbon nanotube composite modified separator for lithium-sulfur battery. ADVANTAGE - The method increases the graphene of the carbon nanotube, ensures the migration of lithium ion and improves the active material utilization rate, realizes the lithium-sulphur battery cycle stability and long circulation life. DETAILED DESCRIPTION - A graphene salt and carbon nanotube composite modified separator preparing method involves ultrasonically dispersing graphene oxide powder in a solvent to obtain a dispersion, adding alkali to adjust the pH of the dispersion to 10-14, and adding an anionic organic salt, and ultrasonically reacting for 0.5-4 hours, where the mass ratio of the anionic organic salt and graphene oxide is 10-30: 1, the anionic organic salt is chloroacetate, chloropropionate, chlorobutyrate, chlorobenzoate, chlorophenylacetate, chloroethylsulfonate, chlorobutylsulfonate, chlorobenzenesulfonate, chlorobenzenesulfinate, and after the reaction, adding ethanol to centrifuge to obtain a solid substance, washing the solid substance with a washing solution, centrifuging and vacuum drying to obtain salted graphene. The salted graphene is added to the solvent, the carbon nanotubes and the binder are added, the container is sealed, and ultrasonically vibrated to obtain a dispersion liquid. The obtained dispersion liquid is suction-filtered, dried and cut on a separator to obtain the finished product.