A multinuclear NMR study of ion transport in P(EO)

S. Suarez, J. Jayakody, S. Abbrent, S.G. Greenbaum, J.H. Shin, S. Passerini

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Abstract

A study of ion transport in P(EO)nLiBETI complexes was undertaken, using both AC impedance and nuclear magnetic resonance (NMR) spectroscopy.1H,7Li and19F NMR techniques were used to investigate structure and dynamics as a function of temperature for n=3, 6, 8, 12 and 20. Spin-lattice relaxation times (T1) and spectral information were obtained from -50 to 100°C. Variable temperature self-diffusion coefficients (D) and ionic conductivity (σ) measurements were also performed. Anion diffusion (DF) results displayed a dependence on available free volume, increasing with decreasing salt concentration. On the other hand, cation diffusion (DLi) results did not follow this trend. DLifor n=3 and 6 suggest the presence of ionic mobility in the crystalline phase, with a significant rise above the melting point. A transition from a crystalline to amorphous phase dominated ion transport occurs at n=8. This is supported by σ results, which exhibited a VTF type of behavior for n≥8 that is associated with ion transport in the amorphous phase. © 2005 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)1113 - 1121
Number of pages9
JournalSolid State Ionics
Volume176
Issue number11-12
DOIs
Publication statusPublished - 31 Mar 2005
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Suarez, S., Jayakody, J., Abbrent, S., Greenbaum, S. G., Shin, J. H., & Passerini, S. (2005). A multinuclear NMR study of ion transport in P(EO). Solid State Ionics, 176(11-12), 1113 - 1121. https://doi.org/10.1016/j.ssi.2005.02.003