期刊
SOLID STATE IONICS
卷 183, 期 1, 页码 32-39出版社
ELSEVIER
DOI: 10.1016/j.ssi.2010.12.008
关键词
Ionic liquids; Polymer-Ionic liquid membrane; Crystallinity; Impedance spectroscopy
资金
- National Academy of Sciences, India
- DST, New Delhi, India [SR/S2/CMP-71/2007]
PEO:IL(1-ethyl-3-methylimidazolium tosylate, EMIM-TY) polymer electrolyte films are prepared by solvent free hot-pressing and characterized by Fourier Transform Infrared Spectroscopy (FTIR), Differential Scanning Calorimetry (DSC), X-ray Diffraction (XRD) and Complex Impedance Spectroscopy. The FTIR/DSC/XRD studies confirm the complexation of the ionic liquid cation (EMIM+) with the ether oxygen, i.e. C-O-C group of PEO polymer backbone. The crystallinity of PEO+IL(EMIM-TY) electrolyte membranes has been found to decrease (plasticization effect) with ionic liquid EMIM-TY content in PEO up to a threshold weight ratio of similar to 20 wt.% and then the crystallinity tends to increase. The room temperature ionic conductivity is found to depend both on the ionic liquid. EMIM-TY content and degree of crystallinity. The temperature dependence of the ionic conductivity of pure ionic liquid EMIM-TY, and the same ionic liquid in PEO matrix is also studied and discussed in this paper. (C) 2010 Elsevier B.V. All rights reserved.
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