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<p>The work aims to investigate the layered perovskite SrLaAlO<sub>4</sub> with the Ruddlesden-Popper structure as a potential proton conductor for medium-temperature solid oxide fuel cells (SOFCs). The sample was synthesized using the glycerol-nitrate method with subsequent calcination of the sample at 1200&#xa0;°C for 24&#xa0;h. Electrical properties were studied in dry and humid atmospheres to confirm the presence of proton conductivity, which dominates at temperatures below 500&#xa0;°C. The phase SrLaAlO<sub>4</sub> is stable over a wide range of partial pressures of oxygen and at high partial pressures of water vapor. The degree of hydration reaches 0.16&#xa0;mol H<sub>2</sub>O, which corresponds to the composition SrLaAlO<sub>3.84</sub>(OH)<sub>0.32</sub>. IR studies confirmed the presence of different types of OH<sup>−</sup>-groups participating in hydrogen bonds of varying strengths.</p>

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Layered perovskite SrLaAlO4 as a proton-conducting material for intermediate-temperature solid oxide fuel cells: synthesis, hydration, and electrical properties

  • 期刊论文

  • 发表日期：

    2025年6月2日

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  • Danil Vasin,
  • Natalia Lakiza,
  • Irina Animitsa

摘要

The work aims to investigate the layered perovskite SrLaAlO4 with the Ruddlesden-Popper structure as a potential proton conductor for medium-temperature solid oxide fuel cells (SOFCs). The sample was synthesized using the glycerol-nitrate method with subsequent calcination of the sample at 1200 °C for 24 h. Electrical properties were studied in dry and humid atmospheres to confirm the presence of proton conductivity, which dominates at temperatures below 500 °C. The phase SrLaAlO4 is stable over a wide range of partial pressures of oxygen and at high partial pressures of water vapor. The degree of hydration reaches 0.16 mol H2O, which corresponds to the composition SrLaAlO3.84(OH)0.32. IR studies confirmed the presence of different types of OH−-groups participating in hydrogen bonds of varying strengths.