Prevention of lithium dendrite growth in single-ion conducting gel polymer electrolytes by incorporating graphene oxide cross-linkers
발표자
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초록
내용
This study explores the development of single-ion conducting gel polymer electrolytes (SPGEs) and their application in lithium metal battery systems. SPGEs are synthesized via an in-situ cross-linking reaction between methacrylate-graphene oxide (MGO) and a lithium cation-conducting monomer (LiMTFSI), using poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) as the matrix polymer. The resulting SGPEs exhibit a highly porous structure, enhancing liquid electrolyte uptake and ionic conductivity. These cross-linked SGPEs demonstrate improved mechanical strength, thermal stability, and electrochemical performance compared to SGPEs without MGO cross-linkers. Additionally, the incorporation of LiMTFSI and MGO cross-linker effectively suppresses lithium dendrite growth due to the lithiophilic properties of the 2D MGO structure. Consequently, lithium metal batteries using these SGPEs show significantly enhanced cycle performance compared to conventional Celgard-liquid electrolyte systems.