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http://dx.doi.org/10.7316/KHNES.2014.25.3.305

Effects of Co-solvent on Passivation Film of Lithium Surface  

Kang, Jihoon (Department of Chemical Engineering, Soonchunhyang University)
Jeong, Soonki (Department of Chemical Engineering, Soonchunhyang University)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.25, no.3, 2014 , pp. 305-310 More about this Journal
Abstract
This study examined the morphological changes in lithium surface immersed in 1mol $dm^{-3}$ (M) $LiPF_6 $ dissolved in propylene carbonate (PC) containing different 1,2-dimethoxyethane (DME) concentrations as a co-solvent. A passivation film was formed on the surface of lithium metal by electrolyte decomposition. The passivation film formation reactions were significantly affected by the amount of co-solvent, DME, in electrolyte solution. A stable film was obtained from the 1 M $LiPF_6 $ / PC:DME (67:33) solution in which lithium electrode showed good electrochemical performances. Atomic force microscope (AFM) and electrochemical impedance spectroscopy (EIS) results revealed that there were no direct correlations between changes in the surface morphology of lithium metal and the resistance behavior of its passivation film.
Keywords
Passivation film; Lithium metal; Dendritic lithium; Co-solvent; Electrolyte;
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Times Cited By KSCI : 3  (Citation Analysis)
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