In this work, the perovskite compounds La 1.5 A 0.5 NiO 4+ δ (A = Ca, Sr or Ba), which is one kind of mixed ionic electronic conductors (MIEC) with perovskite structure, was explored as cathode materials for proton conducting solid oxide fuel cells (H-SOFCs). In order to understand how the size of A-site cations affects material properties, the electrical conductivity and the electrochemical performances of La 1.5 A 0.5 NiO 4+ δ (A = Ca, Sr or Ba) were compared. The results are more interesting. In the middle temperature region (600 °C–700 °C), Ca doping is the best choice among the three alkaline earth elements. In the low temperature region (300 °C–600 °C), Sr-doped single cells Sr-doped single cells have better performance. However, Ba doping easily generates BaCO 3 impurities, which reduces the ion transmission capacity and increases the interface resistance, resulting in poor performance of the ...

中文翻译：

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固体氧化物燃料电池A位掺杂La 2 NiO 4+δ正极材料的电化学性能研究

在这项工作中，探索了钙钛矿化合物La 1.5 A 0.5 NiO 4+δ（A = Ca，Sr或Ba），它是一种具有钙钛矿结构的混合离子电子导体（MIEC），作为质子传导固体的阴极材料氧化物燃料电池（H-SOFC）。为了了解A位阳离子的大小如何影响材料性能，比较了La 1.5 A 0.5 NiO 4+δ（A = Ca，Sr或Ba）的电导率和电化学性能。结果更有趣。在中等温度区域（600°C–700°C）中，Ca掺杂是三种碱土元素中的最佳选择。在低温区域（300°C–600°C），掺Sr的单电池具有更好的性能。但是，Ba掺杂容易产生BaCO 3杂质，