A New Candidate for the Solid Oxide Fuel Cell Cathode, Y 0.9Ca0.1FeO3 Electrical Transport Properties and Defect Structure
A New Candidate for the Solid Oxide Fuel Cell Cathode, Y 0.9Ca0.1FeO3 Electrical Transport Properties and Defect Structure
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固体氧化物燃料电池阴极的新候选材料，Y 0.9Ca0.1FeO3 电输运特性和缺陷结构
DOI：
10.1149/1.1837119
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
H. Yoo
中科院分区：
文献类型：
--
作者：
Chan;H. Yoo
在Y 1-x Ca x FeO 3 (x = 0.1)（一种新提出的固体氧化物燃料电池（SOFC）阴极材料）系统上，测量了总电导率、离子电导率和热电势随温度（900 ≤ T (°C) ≤ 1100）和氧分压（10 -18 ≤ Po 2 /atm ≤ 1）的函数。通过电传输实验将大多数离子载体鉴定为氧离子。在空气中活化能为1.6eV时，离子电导率在10 -4 至10 -2 S/cm的范围内，在氧化气氛中随着Po 2 的增加而趋于增加，而在还原气氛中随着Po 2 的减少而趋于增加。 Y 1-x Ca x FeO 3 体系的缺陷结构由此在反弗伦克尔无序的基础上得到解释。还讨论了系统的热力学稳定性。
The total electrical conductivity, ionic conductivity, and thermopower have been measured as functions of temperature (900 ≤ T (°C) ≤ 1100) and oxygen partial pressure (10 -18 ≤ Po 2 /atm ≤ 1) on the system of Y 1-x Ca x FeO 3 (x = 0.1), a newly proposed solid oxide fuel cell (SOFC) cathode material. The majority ionic carriers are identified as oxygen ions via electrotransport experiments. The ionic conductivity, which is in the range of 10 -4 to 10 -2 S/cm with an activation energy of 1.6 eV in air, tends to increase with increasing Po 2 in oxidizing atmospheres and with decreasing Po 2 in reducing atmospheres. The defect structure of Y 1-x Ca x FeO 3 system is thus explained on the basis of anti-Frenkel disorder. Thermodynamic stability of the system is also discussed.