Lithium-7 NMR studies of concentrated LiI/PEO-based solid electrolytes

Y. Dai, S. Greenbaum*, D. Golodnitsky, G. Ardel, E. Strauss, E. Peled, Yu Rosenberg

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


E. Peled. Highly concentrated polymer electrolytes based on poly(ethylene oxide) (PEO) and LiI, with EO/Li ratio ≤ 3, were investigated by differential scanning calorimetry (DSC), powder X-ray diffraction (XRD) and 7Li solid state nuclear magnetic resonance (NMR) methods. The effect of 15-nm particle size Al2O3 additives and in several cases, other constituents ethylene carbonate and poly(methylmethacrylate) on structure and Li+ ion environment was explored. The addition of Al2O3 suppresses the formation of crystalline phases, including free LiI, which is present in EO/Li= 1.5 samples without Al2O3. The conductivity jump observed in these concentrated electrolytes at around 80°C is correlated with an NMR-observed transition to a Li+ environment which is similar to that of free ions in a molten phase.

Original languageEnglish
Pages (from-to)25-32
Number of pages8
JournalSolid State Ionics
Issue number1-2
StatePublished - 1 Feb 1998


  • Lithium iodide
  • Lithium-7 NMR
  • Nano-crystalline alumina
  • Poly(ethylene oxide)
  • Polymer electrolytes


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