氧化物
铋
钙钛矿(结构)
材料科学
兴奋剂
电解质
离子电导率
热传导
电导率
陶瓷
氧气
快离子导体
无机化学
离子
分析化学(期刊)
化学
结晶学
电极
物理化学
光电子学
复合材料
冶金
有机化学
色谱法
作者
Xiaoping Lei,Zhanhui Peng,Pengfei Liang,Di Wu,Xiaolian Chao,Zupei Yang
标识
DOI:10.1016/j.jallcom.2022.166506
摘要
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).
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