▎ 摘　　要

NOVELTY - Preparation of porous graphene polyethylene glycol-based polymer electrolyte involves (s1) preparing the polyethylene glycol-based polymer and pore-forming agent into mixture, (s2) heating the mixture, cyclodextrin group molecule and end-capping polymer at 40-60℃ in liquid solvent to obtain three kinds of liquid solution, (s3) mixing three kinds of liquid solution, stirring for 12-14 hours, adding porous graphene additive, heating and stirring for 5-48 hours at 40-60℃ to obtain the mixed solution, (s4) casting the mixed solution on the glass plate to form film, vacuum drying at 70-125℃ to obtain the porous film, (s5) soaking in deionized water, ultrasonically processing to make pore-forming agent dissolved in water, vacuum drying at 70-125℃ to obtain porous polymer, and (s6) vacuumizing the porous polymer at 70-125℃, in the vacuum drying box, removing volatile substance, spraying electrolyte containing lithium salt or sodium salt and cooling to room temperature. USE - Preparation of porous graphene polyethylene glycol-based polymer electrolyte used for lithium battery, lithium ion battery, sodium battery, and sodium ion battery. ADVANTAGE - The method provides porous graphene-polyethylene glycol-based polymer electrolyte with improved liquid absorption and retention capability of the polymer film, high temperature resistance, reduces heat shrinkage performance of the electrolyte, and improved application performance of solid battery. The method uses porous graphene as additive, the additive and the polymer system generate chemical effect, which improves the compatibility of the battery system, reduces the side reaction and improves the ion conductivity and reduces the interface impedance.