Ionic Conduction in Ba0.9La0.1Ce0.9Nd0.1O3-α Ceramic

被引：0
作者：
Qiu Li-Gan [1 ]
Wang Mao-Yuan [1 ]
Sun Yu-Feng [1 ]
机构：
[1] Yancheng Teachers Univ, Sch Chem & Chem Engn, Yancheng 224051, Jiangsu, Peoples R China
来源：
CHINESE JOURNAL OF INORGANIC CHEMISTRY | 2013年 / 29卷 / 04期
关键词：
Ba0.9La0.1Ce0.9Nd0.1O3-alpha; gas concentration cell; ac impedance; ionic conduction; DOPED BACEO3; PROTON; OXIDES;
D O I：
10.3969/j.issn.1001-4861.2013.00.117
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Proton-conducting Ba0.9La0.1Ce0.9Nd0.1O3-alpha ceramic was prepared by high temperature solid-state reaction. X-ray powder diffraction pattern (XRD) shows that the material is of a single orthorhombic phase of perovskite-type BaCeO3. Ionic conduction in the material under different gas atmospheres was studied by using gas concentration cell and ac impendence spectroscopy methods in the temperature range of 500 similar to 900 degrees C, respectively, and compared with that of Ba0.9La0.1Ce0.9Nd0.1O3-alpha. The results indicate that Ba0.9La0.1Ce0.9Nd0.1O3-alpha is a pure protonic conductor with the protonic transport number of 1 in wet hydrogen in the range 500 similar to 900 degrees C. In dry air, Ba0.9La0.1Ce0.9Nd0.1O3-alpha is a mixed conductor of oxide ion and electronic hole. The oxide ionic transport numbers are 0.295 similar to 0.081. The oxide ionic conductivity of the material is higher than that of Ba0.9La0.1Ce0.9Nd0.1O3-alpha. In wet air, Ba0.9La0.1Ce0.9Nd0.1O3-alpha, is a mixed conductor of proton, oxide ion and electronic hole. The protonic transport numbers are 0.151 similar to 0.009, and the oxide ionic transport numbers are 0.300 similar to 0.107. The protonic conductivity of the material is lower than that of Ba0.9La0.1Ce0.9Nd0.1O3-alpha. In hydrogen-air fuel cell, Ba0.9La0.1Ce0.9Nd0.1O3-alpha is a mixed conductor of proton, oxide ion and electron. The ionic transport numbers are 0.964 similar to 0.853. The ionic conductivity of the material is close to that of Ba0.9La0.1Ce0.9Nd0.1O3-alpha.
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页码：838 / 844
页数：7
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