▎ 摘　　要

NOVELTY - Single ion polymer electrolyte separator based on sulfonated graphene oxide is having uniform and dense pore structure distribution, porosity of 55-57%, and membrane liquid absorption rate is 138-141%. USE - Single ion polymer electrolyte separator based on sulfonated graphene oxide used in lithium ion batteries (claimed). ADVANTAGE - The single ion polymer electrolyte separator based on sulfonated graphene oxide has excellent electrochemical performance, improves ionic conductivity of the electrolyte, and exhibits good rate performance of the system under the room temperature. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) dissolcing polyvinylidene fluoride-hexafluoropropylene copolymer in anhydrous nitrogen methylpyrrolidone to form a polymer solution, adding anhydrous lithium chloride, 4,4'-diaminodiphenyl sulfone, bis (4-carbonylbenzenesulfonyl) imide, triphenyl phosphite and pyridine to the polymer solution, mixing and reacting at 80-120 degrees C for 4-8 hours, to obtain reaction precursor, adding sulfonated graphene oxide to the reaction precursor and continue to stir the reaction vigorously at 80-120 degrees C for 4-8 hoursm, cooling and pouring the reaction solution into a methanol solution to precipitate and filtering, washing and drying to obtain the single ion polymer, dispersing single-ion polymer in an aqueous solution of lithium hydroxide according to the ratio, stirring and reacting at room temperature for 18-30 hours, and then drying to obtain a polymer lithium salt, adding polymer lithium salt to dimethylformamide according to the ratio and heating to dissolve to form a uniform and transparent solution, removing the air bubbles by ultrasonication of the resulting solution, then injecting into a solution film, and heating to the solvent After complete volatilization, to obtain final product; and (2) a lithium ion battery, which comprised a positive electrode material, a negative electrode material, a separator and an electrolyte, where the separator is a single ion polymer electrolyte based on sulfonated graphene oxide, and a separator or a single ion polymer electrolyte separator based on sulfonated graphene oxide.