▎ 摘　　要

NOVELTY - Preparing polyvinylidenefluoride-co-hexafluoropropylene (PVDF-HFP) based gel electrolyte doped with graphene oxide-lithium ion (Li+), comprises (i) preparing graphene oxide (GO) aqueous solution by modified Hummer method, and preparing 3-7m g/ml GO aqueous solution by dilution, (ii) mixing GO and sodium p-styrene sulfonate at a stoichiometric ratio of 1:5, and mixing GO aqueous solution with sodium styrene sulfonate, reacting at 45°C for 12 hours, centrifugally separating, (ii) adding GO-sodium ion (Na+) and lithium hydroxide (LiOH) to N,N-dimethylformamide solvent, reacting at 90°C for 15 hours, adding excess tetrahydrofuran solution, filtering and drying, and (iii) adding GO-Li+ solid powder and PVDF-HFP polymer in solution of PVDF-HFP polymer and N,N-dimethylpyrrolidone (NMP), reacting at 45°C for 3-6 hours to obtain viscous solution, coating on glass plate and drying to obtain polymer electrolyte membrane, and soaking in 1 mol/l LiPF6-EC/DMC/EMC electrolyte. USE - Preparing polyvinylidenefluoride-co-hexafluoropropylene (PVDF-HFP) based gel electrolyte doped with graphene oxide-lithium ion (Li+). Uses include but are not limited to mobile phone, notebook computer, energy storage power supply and new energy automobile field. ADVANTAGE - The method enables to prepare PvDF-HFP base suspected glue electrolyte doped with oxidized graphene, which improves the ion conductivity and mechanical strength of gel electrolyte, by introducing lithium to achieve the function of replenishing lithium, compensating lithium ion battery loss of lithium ion in the first charge and discharge cycle and long-term cycle process, and improving the cycle performance of the battery.