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Abstract <p>High oxygen-ion and proton conductivity is an important property for energy materials, especially for those to be used in solid oxide fuel cells and electrolyzes. The Ruddlesden-Popper complex oxides are a prospective class of oxygen-ion conducting electrolytes. Well-known oxygen-ion conductors with the classic perovskite ABO<sub>3</sub> structure have already been successfully doped using the donor-doping method. However, results on the application of this donor-doping method to Ruddlesden-Popper complex oxides are not so extensive. In this paper, novel complex oxide Ba<sub>0.95</sub>La<sub>1.05</sub>InO<sub>4.025</sub> with a Ruddlesden-Popper structure has been synthesized and investigated for the first time. The oxygen-ion conductivity values for the new donor doped (La<sup>3+</sup> → Ba<sup>2+</sup>) complex oxide Ba<sub>0.95</sub>La<sub>1.05</sub>InO<sub>4.025</sub> are about 0.5 orders of magnitude higher than those for the undoped BaLaInO<sub>4</sub> composition. The oxygen-ion transport numbers of the new composition Ba<sub>0.95</sub>La<sub>1.05</sub>InO<sub>4.025</sub> reach approximately 90% at 300°C.</p> Graphical abstract <p></p>

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Ionic conductivity in the novel complex oxide Ba0.95La1.05InO4.025 with Ruddlesden-Popper structure

  • 期刊论文

  • 发表日期：

    2025年5月15日

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  • E. Abakumova,
  • T. Kuznetsova,
  • V. Zaviralova,
  • V. Gnatyuk,
  • D. Pyankov,
  • N. Tarasova

摘要

Abstract

High oxygen-ion and proton conductivity is an important property for energy materials, especially for those to be used in solid oxide fuel cells and electrolyzes. The Ruddlesden-Popper complex oxides are a prospective class of oxygen-ion conducting electrolytes. Well-known oxygen-ion conductors with the classic perovskite ABO3 structure have already been successfully doped using the donor-doping method. However, results on the application of this donor-doping method to Ruddlesden-Popper complex oxides are not so extensive. In this paper, novel complex oxide Ba0.95La1.05InO4.025 with a Ruddlesden-Popper structure has been synthesized and investigated for the first time. The oxygen-ion conductivity values for the new donor doped (La3+ → Ba2+) complex oxide Ba0.95La1.05InO4.025 are about 0.5 orders of magnitude higher than those for the undoped BaLaInO4 composition. The oxygen-ion transport numbers of the new composition Ba0.95La1.05InO4.025 reach approximately 90% at 300°C.

Graphical abstract