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<p>The effect of adding nanosized γ-Al<sub>2</sub>O<sub>3</sub> on the properties and structure of Na<sub>2</sub>SO<sub>4</sub> is studied using differential scanning calorimetry, vibrational spectroscopy, electrochemical impedance spectroscopy, and X-ray diffractometry. It is shown that the introduction of nanosized γ-Al<sub>2</sub>O<sub>3</sub> to sodium sulfate considerably increases the ionic conductivity up to 8.48 × 10<sup>–5</sup> S/cm at 603 K. The results of X-ray diffraction and vibrational spectroscopic studies confirm the partial amorphization of the salt in the near-surface region of nanoparticles. The data obtained indicate that the sodium sulfate-based composite may be a promising ionic conductor for solid-state Na-ion batteries in the temperature range of 513–603 K.</p>

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Composite Solid Electrolyte Na2SO4–Al2O3

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • K. Sh. Rabadanov,
  • M. M. Gafurov,
  • A. M. Amirov,
  • D. Yu. Kovalev,
  • M. A. Akhmedov,
  • M. G. Kakagasanov,
  • M. B. Ataev,
  • Z. Yu. Kubataev,
  • M. V. Kadiev

摘要

The effect of adding nanosized γ-Al2O3 on the properties and structure of Na2SO4 is studied using differential scanning calorimetry, vibrational spectroscopy, electrochemical impedance spectroscopy, and X-ray diffractometry. It is shown that the introduction of nanosized γ-Al2O3 to sodium sulfate considerably increases the ionic conductivity up to 8.48 × 10–5 S/cm at 603 K. The results of X-ray diffraction and vibrational spectroscopic studies confirm the partial amorphization of the salt in the near-surface region of nanoparticles. The data obtained indicate that the sodium sulfate-based composite may be a promising ionic conductor for solid-state Na-ion batteries in the temperature range of 513–603 K.