Lithium dendrite suppression by single-ion conducting gel polymer electrolyte cross-linked with graphene oxide
발표자
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초록
내용
In this study, single-ion conducting gel polymer electrolytes (SPGEs) were prepared via in situ cross-linking reaction of methacrylategraphene oxide (MGO) and single-ion conducting monomer (LiMTFSI) using poly(vinylidene fluoride-cohexafluoropropylene) (PVH) as a matrix polymer. Due to the highly porous structure, SGPE showed high electrolyte uptake and high ionic conductivity. Compared with the SGPE without MGO crosslinker, the cross-linked SGPEs showed improved mechanical strength, thermal and electrochemical stability. In addition, dendrite growth at the lithium metal surface was successfully suppressed by the single-ion moiety of LiMTFSI and lithiophilic MGO cross-linker. As a result, lithium metal batteries assembled with SGPE showed improved cycling performances compared to the Liquid electrolyte-Celgard system.