Ionic conductivity of new ambient temperature alkali metal glasses AlCl3/NaN(CN)2

Yi Chia Lee, Larry A. Curtiss, Mark A. Ratner, Duward F. Shriver

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Abstract

Ambient temperature alkali glassy salt mixtures, x[AlCl3]/(1 - x)[NaN(CN)2] (x = 0.4 - 0.75), were prepared. A large increase in the C≡N stretching frequencies for these materials indicate complex formation between the anion [N(CN)2]- and AlCl3 molecule. Ab initio calculations confirm the assignments of the vibrational frequencies. The 1:1 adduct has a glass transition at 27 °C, and the glassy state persists for 4 weeks at room temperature. The room temperature ionic conductivity of this glass is 6.6 x 10-6 S/cm, and it increases as the AlCl3 content increases. The temperature dependence of the conductivity follows the Vogel-Tamman-Fulcher equation, suggesting that ion transport is coupled to local motion in the glassy salt mixture system.

Original languageEnglish
Pages (from-to)1634-1637
Number of pages4
JournalChemistry of Materials
Volume12
Issue number6
DOIs
Publication statusPublished - Jun 1 2000

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ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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