Trifluoropropyltrimethoxysilane 전해질 첨가제를 이용한 리튬이온전지의 싸이클 특성 향상

초록

In this study, we tried to improve the cycling performance of lithium-ion batteries bysuppressing decomposition of the electrolyte solution containing fluorsilane-based additive. Trifluoropropyltrimethoxysilanewas electrochemically oxidized and reduced prior to the decompositionof the liquid electrolyte composed of lithium salt and carbonate-based organic solvent. Thus, thestable solid electrolyte interphase (SEI) layer on both negative electrode and positive electrode wasformed, and it was confirmed that the cycling performance of lithium-ion batteries assembled withelectrolyte solution containing 5 wt.% trifluoropropyltrimethoxysilane was the mostly enhanced. Theproducts formed on electrodes were analyzed by the SEM and XPS analysis, and it was demonstratedthat trifluoropropyltrimethoxysilane can be one of the promising SEI-forming additives.

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