The effect of ionic liquid fragment on the performance of polymer electrolytes |
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| Authors: | Qiuliang Du Xiangkai Fu Sujuan Liu Lidan Niu |
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| Affiliation: | College of Chemistry and Chemical Engineering, Research Institute of Applied Chemistry Southwest University, Key Laboratory of Applied Chemistry of Chongqing Municipality, Key Laboratory of Eco‐environments in Three Gorges Reservoir Region (Ministry of Education), Chongqing 400715, PR China |
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| Abstract: | An ionic liquid 1‐methyl‐3‐2‐(methacryloyloxy)ethyl]imidazolium bis(trifluoromethane sulfonylimide) (MMEIm‐TFSI) was synthesized and polymerized. Composite polymer electrolytes based on polymeric MMEIm‐TFSI (PMMEIm‐TFSI) and poly(methyl methacrylate)‐co‐(vinyl acetate)] (P(MMA‐VAc)) were prepared, with lithium bis(trifluoromethane sulfonylimide) (LiTFSI) as target ions (Li+). DSC/TGA analysis showed good flexibility and thermal stability of the composite electrolyte membranes. The AC impedance showed that the ionic conductivity of the electrolytes increased with PMMEIm‐TFSI up to a maximum value of 1.78 × 10?4 S cm?1 when the composition was 25 wt% P(MMA‐VAc)/75 wt% PMMEIm‐TFSI/30 wt% LiTFSI at 30 °C. The composite electrolyte membrane (transmittance ≥ 90%) can also be used as the ion‐conductive layer material for electrochromic devices, and revealed excellent colorization performance. Copyright © 2011 Society of Chemical Industry |
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| Keywords: | polymer electrolyte ionic liquid ionic conductivity thermal stability electrochromic devices |
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