Preparation of an alkali-element-doped CeO2-Sm2O3 system and its operation properties as the electrolyte in planar solid oxide fuel cells

被引：0
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作者：
Mori, Toshiyuki [1 ]
Yamamura, Hiroshi [1 ]
Saito, Syoshichi [1 ]
机构：
[1] Tosoh Corp, Ibaraki-ken, Japan
来源：
| 1996年 / American Ceramic Soc, Westerville, OH, United States卷 / 79期
关键词：
General review (GEN) - Experimental (EXP);
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摘要：
The ionic conductivity of the ceria-samaria (CeO2-Sm2O3) system is higher than that of yttria-stabilized zirconia and other CeO2-based oxides. In this study, a small amount of alkali-element-doped CeO2-Sm2O3 solid solution was prepared. This solid solution was characterized by measuring the powder density and the chemical composition. Moreover, its electrochemical properties were investigated in the temperature range from 700° to 1000 °C. It was found that a small amount of alkali-element-doped CeO2 solid solution enhanced the ionic conductivity. The power density of an oxygen-hydrogen fuel cell for alkali-element-doped CeO2-Sm2O3 ceramics exhibited high values at low temperatures such as 700 °C to 800 °C. It is concluded that the improved fuel cell performance can be attributed to the high stability of this composition in the fuel atmosphere.
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