화학공학소재연구정보센터
Journal of Industrial and Engineering Chemistry, Vol.37, 319-324, May, 2016
Liquid type of fluorosulfonyl lithium salts containing siloxane for Li-ion electrolyte
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Our goal in the present work is to synthesize liquid type of electrolyte that can be used in lithium-ion battery, based on fluorosulfonyl group. We synthesized a precursor of fluorosulfonyl isocyanate, and followed to prepare fluorosulfonyl carbamic acid ester lithium salt (SiFSC 1)s and fluorosulfonyl urea lithium salt (SiFSC 2)s containing siloxane electrolytes. Four electrolytes with carbamic or urea structures were prepared by changing the siloxane moieties with different chain length. The synthesized electrolytes are viscous liquid with different color. The resulting electrolytes were characterized by 1H NMR spectroscopy and thermogravimetric analysis (TGA). The ionic conductivity of SiFSCs was compared by LiPF6 and LiFSI.
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