Abstract
The preparation of l-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (BmlmTFSI)-based poly(methyl methacrylate)-poly(vinyl chloride), PMMA-PVC, gel polymer electrolytes was done by solution casting technique. The ionic conductivity of gel polymer electrolytes was increased, up to a maximum value of (1.64 ± 0.01) x 10−4 S/cm by adding 60 wt% of BmlmTFSI. Conductivity-frequency dependence, dielectric relaxation, and dielectric moduli formalism were also further analyzed. These studies assert the ionic transportation mechanisms in the polymer matrix. Occurrence of polarization electrode-electrolyte interface is also observed. This leads to the formation of electrical double layer and hence indicates the non-Debye characteristic of the polymer matrix in the dielectric studies. Based on the changes in shift, changes in intensity, changes in shape, and existence of new peaks, attenuated total reflectance-Fourier transform infrared divulged the complexation between PMMA, PVC, lithium bis(trifluoromethanesulfonyl)imide, and BmlmTFSI, as shown in the infrared spectra.
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Acknowledgment
This work was supported by the Exploratory Research Grant Scheme (ERGS: ER017-2011A) and Universiti Malaya Research Grant (UMRG: RG140-11AFR). One of the co-author gratefully acknowledges the “Skim Bright Sparks University Malaya (SBSUM)” for the financial support.
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Liew, CW., Ramesh, S. & Durairaj, R. Impact of low viscosity ionic liquid on PMMA-PVC-LiTFSI polymer electrolytes based on AC -impedance, dielectric behavior, and HATR-FTIR characteristics. Journal of Materials Research 27, 2996–3004 (2012). https://doi.org/10.1557/jmr.2012.343
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DOI: https://doi.org/10.1557/jmr.2012.343