▎ 摘　　要

NOVELTY - Lithium sulfur electrolyte added with Grignard reagent derivative is obtained by adding Grignard reagent derivative to lithium sulfur electrolyte, lithium salt to organic solvent at concentration 0.5-2 mol/l, and adding amount of Grignard reagent derivative is 0.2-0.3 vol.%, lithium salt is lithium hexafluorophosphate, lithium tetrafluoroborate, lithium trifluoromethanesulfonate, lithium bis (trifluoromethanesulfonyl) imide, tris (trifluoromethyl) sulfonyl methyl lithium, or lithium bis (oxalato) borate, and organic solvent is ethylene glycol dimethyl ether and dioxolane at volume ratio of 1:1. USE - Lithium sulfur electrolyte added with Grignard reagent derivative for lithium battery (claimed). ADVANTAGE - The electrolyte promotes conversion and catalysis of intermediate product polysulfide, reduces dissolution of intermediate product, has certain protective effect to lithium cathode, inhibits shuttle effect, and improves capacity and cycle stability of battery. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for use of lithium-sulfur electrolyte added with Grignard reagent derivatives in a lithium battery by mixing graphene and sulfur powder and grinding at a mass ratio of 4:6, and pouring sulfur to obtain positive electrode material, mixing positive electrode material, acetylene black and PVDF uniformly according to the mass ratio of 7:2:1, adding N-methylpyrrolidone and mixing to form a slurry, which is coated on the aluminum foil, and drying to obtain a positive electrode sheet, with a lithium sheet as the negative electrode, where lithium-sulfur electrolyte added with Grignard reagent derivatives is the electrolyte, which is assembled into a battery in a glove box.