A kind of lithium-sulfur cell electrolyte and its application containing functional additive

The present invention relates to a kind of lithium-sulfur cell electrolyte containing functional additive and its application, including lithium salts, solvent and additive, the additive is organic sulfur compound R1 S i R2 or/and inorganic sulphide M x S y ；On the basis of the cumulative volume of the electrolyte, the total mol concentration of the additive is 0.001~20 mol/L.The present invention uses functional additive of the compound containing S as lithium-sulfur cell electrolyte, is directly reacted with active material, effectively suppresses the shuttle of more sulphions in electrolyte, improves the capacity stability of battery, improves battery long circulating performance, and method is simple and easy.