首页|Realizing oxygen ion conduction in perovskite structure NaNbO3 by A-site Bismuth doping
Realizing oxygen ion conduction in perovskite structure NaNbO3 by A-site Bismuth doping
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NSTL
Elsevier
? 2022 Elsevier B.V.The perovskite structure materials used as an oxygen ion conductor in solid oxide fuel cells have been widely studied. Here, we report novel property of NaNbO3-based ceramics about oxygen ion conduction. The grain size is significantly increased as well as the structural symmetry is enhanced with bismuth doping. Based on the analysis of AC impedance in serial pO2, nearly pure oxide ions conduction characteristic was realized in Na0.4Bi0.2NbO3 composition. Remarkably, electrical conductivity of Na0.4Bi0.2NbO3 sharply increased 3 orders of magnitude to 0.01 S/cm at 700 °C compared to that of NaNbO3 oxides. This study not only discovered the novel ionic conductor properties of Na0.4Bi0.2NbO3, but also provided a new candidate for the solid electrolyte of medium-temperature solid oxide fuel cells (IT-SOFCs).
Grain SizeNaNbO3 ceramicsOxide Ion ConductionSOFCs
Lei X.、Peng Z.、Wu D.、Chao X.、Yang Z.、Liang P.
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Key Laboratory for Macromolecular Science of Shaanxi Province Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Laboratory for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University
School of Physics and Information Technology Shaanxi Normal University
NSTL
Elsevier
