Physicochemical properties of (CH3)2NH2Cl–Al2O3 composites

A. S. Ulikhin A. S. Ulikhin , N. F. Uvarov N. F. Uvarov , K. B. Gerasimov K. B. Gerasimov , A. A. Iskakova A. A. Iskakova , Yu. G. Mateishina Yu. G. Mateishina
Российский электрохимический журнал
Abstract / Full Text

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.

Author information
  • Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630128, Russia

    A. S. Ulikhin, N. F. Uvarov, K. B. Gerasimov & A. A. Iskakova

  • Novosibirsk State Technical University, Novosibirsk, 630073, Russia

    N. F. Uvarov & Yu. G. Mateishina

  • Novosibirsk State University, Novosibirsk, 630090, Russia

    N. F. Uvarov & Yu. G. Mateishina

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