Resumen:
The practical application of lithium metal batteries is constrained by low coulombic efficiency and safety risks arising from Li dendrite growth. Developing functional gel polymer electrolytes (GPEs) systems is recognized as promising approach to address these challenges. In this work, a novel GPE (HFP/PEO-EMIM) was obtained by unctionalizing the PVDF-HFP/PEO composite with EMIMTFSI ionic liquid. The resulting HFP/PEO-EMIM exhibits strong chemical stability and excellent heat resistance. The introduction of EMIMTFSI improves the interfacial compatibility between HFP/PEO-EMIM and the Li anode. More importantly, experiments and theoretical calculations show that EMIM+ cations preferentially interact with polymer molecules, ensuring high Li flux and accelerating its transport. Therefore, HFP/PEO-EMIM exhibits a high ionic conductivity of 1.82 mS cm−1. Additionally, the enriched TFSI− promotes the formation of a stable inorganic-rich SEI, enabling uniform Li deposition.
