Plasticised polymer electrolytes based on PMMA grafted natural rubber-LiCF3SO3-PEG200
Document Type
Article
Publication Date
1-1-2011
Abstract
Polymer electrolyte membranes that consist of 70 wt-% natural rubber grafted with 30 wt-% poly(methyl methacrylate) (MG30) and 30 wt-% lithium trifluoromethane sulphonate (LiTf) salt have been investigated with various concentrations of poly(ethylene glycol) 200 (PEG200). The formation of polymer-salt complexes has been confirmed by Fourier transform infrared spectral studies. X-ray diffraction studies further confirmed that all the samples prepared are amorphous. The highest conducting sample has the composition of 63 wt-% MG30-27 wt-% LiTf-10 wt-% PEG with conductivity of 3.65 x 10(-4) S cm(-1) at 298 K. From differential scanning calorimetry studies, the glass transition temperature T-g is found to increase from -63 to -54 degrees C with the increase in PEG concentration at 30 wt-% PEG200. The ionic transference number of mobile ions has been estimated using Wagner's polarisation method, and the results reveal that the conducting species are mainly ions.
Keywords
natural rubber, pmma, sem, complexation, conductivity, cyclic voltammetry conductivity, cyclic voltammetry lithium, rubber, complexes, transport, peo, batteries, triflate, behavior, water
Divisions
PHYSICS
Publication Title
Materials Research Innovations
Volume
15
Publisher
Springer Verlag (Germany)
Additional Information
Department of Physics, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA