Relation between electrical conductivity and chemical stability of BaCeO3-based proton conductors with different trivalent dopants
Relation between electrical conductivity and chemical stability of BaCeO3-based proton conductors with different trivalent dopants
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DOI：
10.1149/1.2458743
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发表时间：
2007-01-01
影响因子：
--
通讯作者：
Ishihara, Tatsumi
中科院分区：
文献类型：
--
作者：
Matsumoto, Hiroshige;Kawasaki, Yuya;Ishihara, Tatsumi
三价阳离子掺杂的 BaCeO3 在中间温度下具有相当高的质子电导率。本文讨论了 BaCe0.9M0.1O3-alpha 中的掺杂剂 M（M = Y、Tm、Yb、Lu、In 或 Sc）对 400 - 900 摄氏度电（离子）电导率和化学稳定性的影响。研究发现，这两种性质均受掺杂剂离子半径的影响，并且呈权衡关系。电导率似乎也受到掺杂元素的电负性的影响，即电导率随着离子半径的增加和电负性的降低（碱度的增加）而增加。 (c) 2007 年电化学协会。
Trivalent-cation-doped BaCeO3 has fairly high protonic conductivity at intermediate temperatures. This paper deals with the effects of the kind of dopant, M in BaCe0.9M0.1O3-alpha (M = Y, Tm, Yb, Lu, In, or Sc), on the electrical (ionic) conductivity at 400 - 900 degrees C and chemical stability. It was found that the two properties are both governed by the ionic radii of the dopants and are in a trade-off relation. The electrical conductivity seems to be also affected by the electronegativity of the dopant element, i.e., the conductivity increases with increasing ionic radius and decreasing electronegativity (increasing basicity). (c) 2007 The Electrochemical Society.