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http://dx.doi.org/10.5229/JKES.2014.17.3.156

Trifluoropropyltrimethoxysilane as an Electrolyte Additive to Enhance the Cycling Performances of Lithium-Ion Cells  

Shin, Won-Kyung (Department of Chemical Engineering, Hanyang University)
Park, Se-Mi (Department of Chemical Engineering, Hanyang University)
Kim, Dong-Won (Department of Chemical Engineering, Hanyang University)
Publication Information
Journal of the Korean Electrochemical Society / v.17, no.3, 2014 , pp. 156-163 More about this Journal
Abstract
In this study, we tried to improve the cycling performance of lithium-ion batteries by suppressing decomposition of the electrolyte solution containing fluorsilane-based additive. Trifluoropropyltrimethoxysilane was electrochemically oxidized and reduced prior to the decomposition of the liquid electrolyte composed of lithium salt and carbonate-based organic solvent. Thus, the stable solid electrolyte interphase (SEI) layer on both negative electrode and positive electrode was formed, and it was confirmed that the cycling performance of lithium-ion batteries assembled with electrolyte solution containing 5 wt.% trifluoropropyltrimethoxysilane was the mostly enhanced. The products formed on electrodes were analyzed by the SEM and XPS analysis, and it was demonstrated that trifluoropropyltrimethoxysilane can be one of the promising SEI-forming additives.
Keywords
Trifluoropropyltrimethoxysilane; Solid electrolyte interphase; SEI-forming additive; Liquid electrolyte; Lithium-ion battery;
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