Preparation and characterization of lithium ion conducting ionic liquid-based biodegradable corn starch polymer electrolytes |
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Authors: | Chiam-Wen Liew S Ramesh K Ramesh A K Arof |
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Institution: | (1) Centre for Ionics University Malaya, Department of Physics, Faculty of Science, University of Malaya, Lembah Pantai, 50603 Kuala Lumpur, Malaysia |
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Abstract: | Thin films of biodegradable corn starch-based biopolymer electrolytes were prepared by solution casting technique. Lithium
hexafluorophosphate (LiPF6) and 1-butyl-3-methylimidazolium trifluoromethanesulfonate (BmImTf) were employed as lithium salt and ionic liquid, respectively.
With reference to the temperature dependence study, Arrhenius relationship was observed. The highest ionic conductivity of
(6.00 ± 0.01) × 10−4 S cm−1 was obtained at 80 °C. Based on x-ray diffraction (XRD) result, the peaks became broader with doping of ionic liquid revealing
the higher amorphous region of the biopolymer electrolytes. Ionic liquid-based biopolymer electrolytes exhibited lower glass
transition temperature (T
g). |
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Keywords: | |
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