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Ionic conduction in polyether-based lithium arylfluorosulfonimide ionic melt electrolytes
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DOI：10.1016/j.electacta.2009.05.050.png)
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Abstract
En 中文
We report synthesis, characterization and ion transport in polyether-based ionic melt electrolytes consisting of Li salts of low-basicity anions covalently attached to polyether oligomers. Purity of the materials was investigated by HPLC analysis and electrospray ionization mass spectrometry. The highest ionic conductivity of 7.1 x 10(-6) S/cm at 30 degrees C was obtained for the sample consisting of a lithium salt of an arylfluorosulfonimide anion attached to a polyether oligomer with an ethyleneoxide (EO) to lithium ratio of 12. The conductivity order of various ionic melts having different polyether chain lengths suggests that at higher EO:Li ratios the conductivity of the electrolytes at room temperature is determined in part by the amount of crystallization of the polyether portion of the ionic melt. (C) 2009 Elsevier Ltd. All rights reserved.
Keywords:
Ionic melt
Lithium arylfluorosulfonimide
Ionic conductivity
Polyethylene glycol
Lithium batteries
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