Performance of BaZrO3 based Proton Conductors as an Electrolyte for Intermediate Temperature Operating SOFC

被引：10
|
作者：
Iguchi, F. [1 ]
Tokikawa, T. [1 ]
Miyoshi, T. [1 ]
Tsurui, T. [2 ]
Nagao, Y. [1 ,3 ]
Sata, N. [1 ,3 ]
Yugami, H. [1 ,3 ]
机构：
[1] Tohoku Univ, Grad Sch Engn, Aoba Ku, Aramaki 6-6-01, Sendai, Miyagi 9808579, Japan
[2] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808579, Japan
[3] Tohoku Univ, Grad Sch Engn, Sendai, Miyagi 9808579, Japan
来源：
SOLID OXIDE FUEL CELLS 10 (SOFC-X), PTS 1 AND 2 | 2007年 / 7卷 / 01期
关键词：
D O I：
10.1149/1.2729352
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Investigative results of Y concentration dependence of total conductivity, and testing results of self-supported cells, gave us knowledge to realize intermediate temperature operating SOFCs using Y-doped BaZrO3 proton conductors. An increase of Y concentration improved electrical properties of grain boundaries drastically. As a result, total conductivity of a 15mol% Y doped BaZrO3 sample in wet air and wet Ar showed 5mScm(-1) at 400 degrees C. The performance of the self-supported cells was very low because of high electrolyte resistance caused by those thicknesses. Open circuit voltage (OCV) was over 1V in the temperature range of 600 degrees C to 400 degrees C in spite of low ionic transparent number in wet air at 600 degrees C. Degradation of electrolytes was not observed during tests. From those results, electrode-supported cells using Y-doped BaZrO3 Will show sufficient cell performance for intermediate temperature SOFCs.
引用
收藏
页码：2331 / +
页数：2
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