7Li, 29Si, and 31P NMR studies in LiClLi2Op2O5SiO2 glasses: structure and mechanism of ionic conductivity

Ping Ping Tsai, Sung Ping Szu, Martha Greenblatt

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Abstract

The structure and the mechanism of lithium ion conduction in LiClLi2OP2O5SiO2 glasses were studied by 7Li, 29Si, and 31P nuclear magnetic resonance (NMR) spectroscopy. The 31P and 29Si NMR spectra indicate that the phosphate tetrahedra link into linear chains and the majority of the silicate tetrahedra play a bridging role between different phosphate chains. The shape of the central peak for the 7Li NMR spectra changes from Gaussian-like to more Lorentzian-like as the content of LiCl increases. The temperature dependence of the 7Li spectra and T1 measurement at room temperature suggest one lithium environment in all the glasses. The modified Bloembergren, Purcell and Pound theory was applied to the temperature-dependent linewidth of the 7Li spectra above room temperature to calculate the activation energy. The relationship between glass structure and the mechanism of lithium ion conduction is discussed with respect to the glass model proposed by Souquet.

Original languageEnglish (US)
Pages (from-to)131-138
Number of pages8
JournalJournal of Non-Crystalline Solids
Volume135
Issue number2-3
DOIs
StatePublished - Nov 1991

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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