Conductivity dependence on oxygen partial pressure and oxide-ion transport numbers determination for La2Mo2O9

被引：36
|
作者：
Tarancón, A
Norby, T
Dezanneau, G
Morata, A
Peiró, F
Morante, JR
机构：
[1] Univ Barcelona, Dept Elect, E-08028 Barcelona, Spain
[2] Univ Oslo, Ctr Mat Sci, Dept Chem, N-0349 Oslo, Norway
来源：
ELECTROCHEMICAL AND SOLID STATE LETTERS | 2004年 / 7卷 / 10期
关键词：
D O I：
10.1149/1.1795054
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Transport number measurements and impedance spectroscopy in controlled temperature and atmosphere were used to investigate the electrical conduction properties of La2Mo2O9. The compound is a pure oxygen ion conductor in the temperature range of 400-800 degrees C with oxide ion transport numbers greater than 0.99. The effect of the oxygen partial pressure on the electrical conductivity of La2Mo2O9 was investigated from 1 to 10(-22) atm, showing that the material is stable and mainly an ionic conductor down 10(-17) atm at 800 degrees C. These results confirm the suitability of the recently discovered La2Mo2O9-based compounds as electrolytes in solid oxide fuel cell applications. (C) 2004 The Electrochemical Society.
引用
收藏
页码：A373 / A375
页数：3
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