Novel gel polymer electrolytes based on a cellulose ester with PEO side chains

Z. Yue, I. J. McEwen, J. M G Cowie

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)

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 languageEnglish
Pages (from-to)155-162
Number of pages8
JournalSolid State Ionics
Volume156
Issue number1-2
DOIs
Publication statusPublished - Jan 2003

Keywords

  • Cellulose derivative
  • Gel electrolyte
  • Ion conduction

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