ELECTRICAL-PROPERTIES OF CERIA-BASED OXIDES AND THEIR APPLICATION TO SOLID OXIDE FUEL-CELLS

被引：828

作者：

EGUCHI, K

SETOGUCHI, T

INOUE, T

ARAI, H

机构：

[1] Department of Materials Science and Technology, Graduate School of Engineering Sciences, Kyushu University 6-1 Kasugakoen, Kasuga-shi, Fukuoka

来源：

SOLID STATE IONICS | 1992年 / 52卷 / 1-3期

关键词：

D O I：

10.1016/0167-2738(92)90102-U

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ionic conductivities of ceria-alkaline-earth and - rare-earth oxide systems were investigated in relation to their structures, electrical conductivities, and reducibilities. Samaria and gadolinia-doped ceria samples exhibited the highest electrical conductivity in ceria-based oxides because of the close ionic radii of Sm3+ and Gd3+ to that of Ce4+. The ionic conductivity of samaria-doped ceria was also measured by an ac four-probe method with electron blocking electrodes. A solid oxide fuel cell with a samaria-doped ceria electrolyte produced high electric power, because of its highest oxygen ionic conductivity. The reduction of ceria electrolyte at the fuel side could be suppressed by a coating of stabilized zirconia thin film on the ceria surface. The anodic overvoltage of the doped ceria/anode interface was very small.

引用

页码：165 / 172

页数：8

共 14 条

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