Composite Cathode Bi1.14Sr0.43O2.14-Ag for Intermediate-temperature Solid Oxide Fuel Cells

武汉理工大学学报-材料科学版(英文版), 2008, 23(3): 350-353.

^1, , ^2, , ^3, , ^4, , ^5,

1.Faculty of Material Science and Chemical Engineering, China University of Geosciences, Wuhan 430074, China

2.Faculty of Material Science and Chemical Engineering, China University of Geosciences, Wuhan 430074, China

3.Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China

4.Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China

5.Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China

基金项目: The 973 Project of Ministry of Science and Technology in China(T2000026410) 国家自然科学基金(20576063)

Composite Cathode Bi1.14Sr0.43O2.14-Ag for Intermediate-temperature Solid Oxide Fuel Cells

GAO Zhan ^1, , ZHANG Ping ^2, , GAO Ruifeng ^3, , HUANG Jianbing ^4, , MAO Zongqiang ^5,

1.Faculty of Material Science and Chemical Engineering, China University of Geosciences, Wuhan 430074, China

2.Faculty of Material Science and Chemical Engineering, China University of Geosciences, Wuhan 430074, China

3.Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China

4.Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China

5.Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China

Keywords： solid oxide fuel cells (SOFCs)

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℃ is the best. When the content of Ag2O is 70wt%, polarization resistance values for the SSB-Ag cathodes are as low as 0.2Ωcm2 at 700℃ and 0.29Ωcm2 at 650℃. 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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材料期刊网

Composite Cathode Bi1.14Sr0.43O2.14-Ag for Intermediate-temperature Solid Oxide Fuel Cells

参考文献