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Design and evaluation of imidazolium cation-based ionic liquids having double-armed anions for selective cation conduction |
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| Authors: | Wataru Shibayama Asako Narita Noriyoshi Matsumi Hiroyuki Ohno |
| Affiliation: | a Department of Biotechnology, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan b Department of Polymer Chemistry, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan c Graduate School of Bioagricultural Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan |
| Abstract: | A series of triple ionic compounds consisting of double armed anions and one cation were prepared as lithium cation conductive matrices. As anions, lithium borates derived from lithium-9-borabicyclo[3,3,1]nonane hydride were introduced. The sterically hindered borate anion structures prevented the crystallization of triple ionic compounds. Introduction of ethylene oxide chains attached to the borate anions led to lower glass transition temperature, and also improved ionic conductivity. A lithium transference number of 0.73 was observed in spite of the presence of ethylene oxide chains. |
| Keywords: | Molten salt Lithium ion conductor Single ionic conduction Triple ion Lithium borate |
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