Realizing oxygen ion conduction in perovskite structure NaNbO3 by A-site Bismuth doping
Source abstract
Abstract
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 NaNbO 3 -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 pO 2, nearly pure oxide ions conduction characteristic was realized in Na 0.4Bi 0.2NbO 3 composition. Remarkably, electrical conductivity of Na 0.4Bi 0.2NbO 3 sharply increased 3 orders of magnitude to 0.01 S/cm at 700 °C compared to that of NaNbO 3 oxides. This study not only discovered the novel ionic conductor properties of Na 0.4Bi 0.2NbO 3, but also provided a new candidate for the solid electrolyte of medium-temperature solid oxide fuel cells (IT-SOFCs).
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Research context
OpenAlex topics: Advancements in Solid Oxide Fuel Cells · Ferroelectric and Piezoelectric Materials · Electronic and Structural Properties of Oxides
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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