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首页> 外文会议>The 2nd International Symposium on Functional Materials >Co-doping Effect on Microstructures and Ionic Conductivity of Aliovalent Cations Modified Ceria
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Co-doping Effect on Microstructures and Ionic Conductivity of Aliovalent Cations Modified Ceria

机译：共掺杂对铝价阳离子改性二氧化铈微结构和离子电导率的影响

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摘要

Microstructural features and ionic conductivity of divalent (Mg2 + ) and trivalent (Gd3 + ) cations co-doped ceria electrolyte system Ce0.8-xGd0.2MgxO1.9-x were investigated by scanning electron microscopy (SEM) and AC impedance analysis. The experimental results exhibit that addition of MgO to GDC reduces the average binding energy of GDC by decreasing the energy barrier of oxygen ion migration in ceria matrix and the ionic conductivity of 2 mol% magnesium doped GDC (0.018 S/cm) is higher than that of GDC matrix at 650℃ (0.0105 S/cm). Co-doping Mg2+ and Gd3+ is found to increase the ionic conductivity of ceria and hence decreases the operation temperature as well as the cost of solid oxide fuel cell (SOFC).
机译：通过扫描电子显微镜（SEM）和交流阻抗分析研究了二价（Mg2 +）和三价（Gd3 +）共掺杂二氧化铈电解质体系Ce0.8-xGd0.2MgxO1.9-x的微结构特征和离子电导率。实验结果表明，向GDC中添加MgO可以降低二氧化铈基质中氧离子迁移的能垒，从而降低了GDC的平均结合能，掺杂2 mol％镁的GDC的离子电导率（0.018 S / cm）高于其。在650℃（0.0105 S / cm）时的GDC矩阵发现共掺杂Mg2 +和Gd3 +可以增加二氧化铈的离子电导率，从而降低工作温度以及降低固体氧化物燃料电池（SOFC）的成本。

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