A comparative study of coordination between host polymers and Li ions in UV-cured gel polymer electrolytes |
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Authors: | Nam-Soon Choi Jung-Ki Park |
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Institution: | aDepartment of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, 373-1, Guseong-dong, Yuseong-gu, Daejeon, 305-701, Republic of Korea |
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Abstract: | Crosslinked gel polymer electrolytes are prepared via free radical photo-polymerization of 1,6-hexanediol diacrylate (HDDA) or tri(ethylene glycol) diacrylate (TEGDA) with 1 M LiClO4 dissolved in a solvent mixture of ethylene carbonate (EC) and propylene carbonate (PC). TEGDA-based gel polymer electrolytes containing a polar moiety of ethylene oxide exhibit relatively high ionic conductivities over a temperature range from − 15 to 65 °C in comparison to those based on HDDA. The coordination structure between polar moieties of a polymer backbone and Li+ ions is examined using a Fourier transform infrared (FT-IR) spectroscopy. The results of FT-IR analyses manifest that the CO and COC groups of TEGDA-based polymer matrix form the complex with Li+ ions. |
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Keywords: | Tri(ethylene glycol) diacrylate 1 6-Hexanediol diacrylate UV-curing Gel polymer electrolyte FT-IR Ion– dipole interaction |
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