Physicochemical properties of (CH3)2NH2Cl–Al2O3 composites

A. S. Ulikhin, N. F. Uvarov, K. B. Gerasimov, A. A. Iskakova, Yu G. Mateishina

Research output: Contribution to journalArticlepeer-review

Abstract

Composite solid electrolytes were synthesized from the organic salt dimethylammonium chloride (1–x)C2H8NCl–xAl2O3. Their physicochemical properties were studied. In the starting C2H8NCl salt, there is a phase transition at 39°C accompanied by an increase in conductivity by two orders of magnitude. The conductivity of the high-temperature phase is 9.3 × 10–6 S/cm at 160°C. A differential scanning calorimetry study showed that the salt in the composites spreads over the oxide surface and at x > 0.6 the salt melting enthalpy decreases to zero. The conductivity of the resulting composites was studied by impedance spectroscopy. It was shown that heterogeneous doping leads to a sharp increase in ion conductivity to 7.0 × 10–3 S/cm at 160°C and a decrease in the activation energy to 0.55 eV.

Original languageEnglish
Pages (from-to)834-837
Number of pages4
JournalRussian Journal of Electrochemistry
Volume53
Issue number8
DOIs
Publication statusPublished - 1 Aug 2017

Keywords

  • composite solid electrolytes
  • dimethylammonium chloride
  • ion conductivity
  • THERMODYNAMIC PROPERTIES
  • CONDUCTIVITY
  • SOLID ELECTROLYTES

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