Li-air batteries have attracted widespread attention due to their high theoretical energy density.However,safety and environmental challenges are significant in Li-air batteries based on organic liquid electrolytes,as...Li-air batteries have attracted widespread attention due to their high theoretical energy density.However,safety and environmental challenges are significant in Li-air batteries based on organic liquid electrolytes,as they are exposed to air.In this study,we synthesized a composite electrolyte membrane filled with garnet material using a casting method and successfully applied it to Li-air batteries.The polymer electrolyte composed of poly(vinylidene fluoride-hexafluoropropylene)(PVDF-HFP)filled with garnet LLZTO as an active filler(15-PHL CPE),which exhibited excellent flexibility,wide electrochemical window,high ion conductivity and good thermal stability.Furthermore,symmetric Li‖15-PHL CPE‖Li cells stably operate over 3500h at 0.1 mA cm^(-2)and 25℃.The assembled 15-PHL CPE-based Li-air battery reaches a stable cycling performance of 97 cycles at 200 mA g^(-1)with a well-maintained potential gap of1.93 V,which demonstrates promising application in Li-air batteries.展开更多
基金supported by the National Natural Science Foundation of China(U2330124,22411560292,U20A2072,52072352,21875226)the Foundation for the Youth S&T Innovation Team of Sichuan Province(2020JDTD0035)Sichuan Science and Technology Program(2023ZYD0026)。
文摘Li-air batteries have attracted widespread attention due to their high theoretical energy density.However,safety and environmental challenges are significant in Li-air batteries based on organic liquid electrolytes,as they are exposed to air.In this study,we synthesized a composite electrolyte membrane filled with garnet material using a casting method and successfully applied it to Li-air batteries.The polymer electrolyte composed of poly(vinylidene fluoride-hexafluoropropylene)(PVDF-HFP)filled with garnet LLZTO as an active filler(15-PHL CPE),which exhibited excellent flexibility,wide electrochemical window,high ion conductivity and good thermal stability.Furthermore,symmetric Li‖15-PHL CPE‖Li cells stably operate over 3500h at 0.1 mA cm^(-2)and 25℃.The assembled 15-PHL CPE-based Li-air battery reaches a stable cycling performance of 97 cycles at 200 mA g^(-1)with a well-maintained potential gap of1.93 V,which demonstrates promising application in Li-air batteries.
