Ionic conduction in polyether-based lithium arylfluorosulfonimide ionic melt electrolytes |
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Authors: | Mahesha B Herath Stephen E Creager Rama V Rajagopal Olt E Geiculescu Darryl D DesMarteau |
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Affiliation: | aDepartment of Chemistry, Clemson University, Clemson, SC 29634-0973, United States |
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Abstract: | 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 × 10−6 S/cm at 30 °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. |
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Keywords: | Ionic melt Lithium arylfluorosulfonimide Ionic conductivity Polyethylene glycol Lithium batteries |
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