Layered perovskite oxide Y0.8Ca0.2BaCoFeO5+δ as a novel cathode material for intermediate-temperature solid oxide fuel cells
来源期刊：Journal of Rare Earths2015年第5期
论文作者：余良浩 陈永红 顾庆文 田冬 卢肖永 孟广耀 林彬
文章页码：519 - 523
摘 要：A layered perovskite oxide Y0.8Ca0.2Ba Co Fe O5+δ（YCBCF） was synthesized as a novel cathode material for intermediate-temperature solid oxide fuel cells（IT-SOFCs） by citric acid-nitrates self-propagating combustion method. The phase and microstructure of YCBCF were investigated by X-ray diffraction（XRD） and scanning electron microscopy（SEM）, respectively. The average thermal expansion coefficient（TEC） of YCBCF was 14.6×10–6 K–1, which was close to other materials of SOFC at the range of RT–1000 oC. An open-circuit potential of 0.75 V and a maximum output power density of 426 m W/cm2 were obtained at 650 oC in a Sm0.2Ce0.8O1.9（SDC）-based anode-supported SOFC by using humidified（3% H2O） hydrogen as fuel and static air as oxidant. The results indicated that the YCBCF was a promising cathode candidate for IT-SOFCs.
余良浩1,2，陈永红1，顾庆文1，田冬1，卢肖永1，孟广耀1，林彬1
1. Anhui Key Laboratory of Low Temperature Co-fired Materials Department of Chemistry and Engineering Huainan Normal University2. School of Chemical Engineering Anhui University of Science and Technology
摘 要：A layered perovskite oxide Y0.8Ca0.2Ba Co Fe O5+δ（YCBCF） was synthesized as a novel cathode material for intermediate-temperature solid oxide fuel cells（IT-SOFCs） by citric acid-nitrates self-propagating combustion method. The phase and microstructure of YCBCF were investigated by X-ray diffraction（XRD） and scanning electron microscopy（SEM）, respectively. The average thermal expansion coefficient（TEC） of YCBCF was 14.6×10–6 K–1, which was close to other materials of SOFC at the range of RT–1000 oC. An open-circuit potential of 0.75 V and a maximum output power density of 426 m W/cm2 were obtained at 650 oC in a Sm0.2Ce0.8O1.9（SDC）-based anode-supported SOFC by using humidified（3% H2O） hydrogen as fuel and static air as oxidant. The results indicated that the YCBCF was a promising cathode candidate for IT-SOFCs.
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