Poly(oxyethylene) electrolytes based on lithium pentafluorobenzene sulfonate |
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Authors: | E. Paillard J. Guindet J.-Y. Sanchez |
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Affiliation: | LEPMI, Laboratoire d’Electrochimie et de Physicochimie des Matériaux et des Interfaces, UMR 5631 CNRS-INPG-UJF, BP 75, 38402 Saint-Martin-d’Hères Cedex, France |
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Abstract: | Lithium pentafluorobenzene sulfonate was synthesized by a protocol whereby pollution by aromatic nucleophilic substitutions on the perfluorinated ring was avoided. Its poly(oxyethylene) complexes, although less conductive than lithium imide complexes, provided cationic transference numbers higher than 0.5. Surprisingly, even at fairly low concentrations, this salt markedly increased the mechanical properties of the polymer electrolyte. This effect was attributed to telechelic interactions of the ion pairs with distinct polyether chains and is in agreement with the high cationic transference numbers. |
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Keywords: | Polymer electrolyte Ionic conductivity Transference numbers Lithium pentafluorobenzene sulfonate |
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