Composite cathode Bi1.14Sr0.43O2.14-Ag for intermediate-temperature solid oxide fuel cells

被引：0
作者：
Zhan Gao
Ping Zhang
Ruifeng Gao
Jianbing Huang
Zongqiang Mao
机构：
[1] China University of Geosciences,Faculty of Material Science and Chemical Engineering
[2] Tsinghua University,Institute of Nuclear and New Energy Technology
来源：
Journal of Wuhan University of Technology-Mater. Sci. Ed. | 2008年 / 23卷
关键词：
solid oxide fuel cells (SOFCs); composite cathode; strontium stabilized bismuth oxide (SSB); samaria doped ceria (SDC);
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Composites consisting of strontium stabilized bismuth oxide (Bi1.14Sr0.43O2.14, SSB) and silver were investigated as cathodes for intermediate-temperature solid oxide fuel cells with doped ceria electrolyte. There were no chemical reactions between the two components. The microstructure of the interfaces between composite cathodes and Ce0.8Sm0.2O1.9 (SDC) electrolytes was examined by scanning electron microscopy (SEM). Impedance spectroscopy measurements show that the performance of cathode fired at 700 °C is the best. When the content of Ag2O is 70 wt%, polarization resistance values for the SSB-Ag cathodes are as low as 0.2 Ωcm2 at 700 °C and 0.29 Ωcm2 at 650 °C. These results are much smaller than some of other reported composite cathodes on doped ceria electrolyte and indicate that SSB-Ag composite is a potential cathode material for intermediate temperature SOFCs.
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页码：350 / 353
页数：3
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