Enhancement of ion dynamics in PMMA-based gels with addition of TiO2 nano-particles

J. Adebahr, N. Byrne, M. Forsyth, D. R. MacFarlane, P. Jacobsson

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Abstract

Solvent and ion dynamics in PMMA based gels have been investigated as a function of the loading of nanosized TiO2 particles. The gels have a molar ratio of 46.5:19:4.5:30 of ethylene carbonate (EC), propylene carbonate (PC), lithium perchlorate and PMMA, respectively. A series of samples with 0, 4, 6 and 8 wt.% TiO2 filler were investigated. The diffusion coefficients for the lithium ions and for the two solvents (EC and PC) were investigated by pfg-NMR. It was shown that the addition of filler to the gel electrolytes enhances the diffusion of the cations, while the diffusion of the solvents remains constant. Raman measurements show no significant changes in ion-ion interactions with the addition of fillers, while the ionic conductivity is seen to decrease. However, the sample with 8 wt.% TiO2 had a conductivity close to that of the unfilled sample.

Original languageEnglish
Pages (from-to)2099-2103
Number of pages5
JournalElectrochimica Acta
Volume48
Issue number14-16 SPEC.
DOIs
Publication statusPublished - 30 Jun 2003

Keywords

  • Composite electrolytes
  • Nanocomposite
  • NMR
  • PMMA
  • Polymer gel electrolytes
  • Raman
  • TiO

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