Abstract
A range of gel electrolytes, composed of a hydroxypropylcellulose ester with poly(oxyethylene) side chains, LiCF3SO3 and propylene carbonate (PC), or a mixture of propylene carbonate with ethylene carbonate (EC), were prepared and studied. The conductivities of gels containing 10 wt.% LiCF3SO3, and having propylene carbonate concentrations varying from 20 to 70 wt.%, exhibit Arrhenius behaviour with activation energies ranging from 16 to 34 kJ mol-1. Room temperature conductivities of the order of 10-3 S cm-1 are achieved with propylene carbonate contents above 50 wt.%. Gels containing 70 wt.% propylene carbonate, or a mixtures of propylene carbonate and ethylene carbonate, were cross-linked to form elastomeric films exhibiting good mechanical properties and room temperature conductivities of ~ 10-3 S cm-1. The conductivities and mechanical strength of these films increased with increasing ethylene carbonate content. An Arrhenius dependence of log conductivity on (1/T) is also observed in these films, with activation energies for ion transport around 16 kJ mol-1. © 2003 Elsevier Science B.V. All rights reserved.
Original language | English |
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Pages (from-to) | 155-162 |
Number of pages | 8 |
Journal | Solid State Ionics |
Volume | 156 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - Jan 2003 |
Keywords
- Cellulose derivative
- Gel electrolyte
- Ion conduction