▎ 摘　　要

NOVELTY - Method for preparing doped graphene-polyethylene glycol based conversion film by vacuum adsorption method, involves (i) dissolving a mixture of polyethylene glycol-based polymer and pore-forming agent, cyclodextrin-based molecules and end-capped polymers in liquid solvents to prepare three liquid solutions, (ii) mixing the three liquid solutions, stirring, adding the doped graphene additive, continuously heating and stirring, and preparing the mixed solution, (iii) casting the mixed solution on a glass plate to form a film, ultrasonically treating to dissolve the pore-forming agent in the conversion film, and vacuum-drying to prepare a porous polymer, and (iv) continuously vacuumizing the porous polymer in a vacuum drying oven to remove volatile substances, spraying to an electrolyte solution containing lithium salt or sodium salt, and cooling to room temperature to obtain a polymer electrolyte, which is the doped graphene-polyethylene glycol-based conversion film. USE - The method is used for preparing doped graphene-polyethylene glycol based conversion film for lithium battery, lithium-ion battery and sodium ion battery. ADVANTAGE - The method improves liquid absorbing ability of the polymer film, high temperature resistance, ion conductivity, surface impedance and battery compatibility. DETAILED DESCRIPTION - Method for preparing doped graphene-polyethylene glycol based conversion film by vacuum adsorption method, involves (i) dissolving a mixture of polyethylene glycol-based polymer and pore-forming agent, cyclodextrin-based molecules and end-capped polymers in liquid solvents to prepare three liquid solutions, (ii) mixing the three liquid solutions, stirring for 12-14 hours, adding the doped graphene additive, continuously heating and stirring for 5-48 hours, and preparing the mixed solution, (iii) casting the mixed solution on a glass plate to form a film, and ultrasonically treating in water, ethanol or an aqueous solution of ethanol at 40-70℃ to form a conversion film, performing ultrasonic treatment to dissolve the pore-forming agent in the conversion film, and vacuum-drying at 70-125℃ to prepare a porous polymer, and (iv) continuously vacuumizing the porous polymer in a vacuum drying oven to remove volatile substances at 70-125℃, spraying to an electrolyte solution containing lithium salt or sodium salt, and cooling to room temperature to obtain a polymer electrolyte, which is the doped graphene-polyethylene glycol-based conversion film.