| Preparation and performance of Pr-doped Ba_(0.5)Sr_(0.5)Co_(0.8)Fe_(0.2)O_(3-δ) cathode for IT-SOFCs |
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| 引用本文： | 朱成军,衣翠珊,潮洛蒙.Preparation and performance of Pr-doped Ba_(0.5)Sr_(0.5)Co_(0.8)Fe_(0.2)O_(3-δ) cathode for IT-SOFCs[J].中国稀土学报(英文版),2011,29(11):1070-1074. |
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| 作者姓名： | 朱成军 衣翠珊 潮洛蒙 |
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| 作者单位： | Key Laboratory of Semiconductor Photovoltaic Technology of Inner Mongolia Autonomous Region;School of Physical Science and Technology;Inner Mongolia Univer-sity; |
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| 基金项目： | Project supported by Key Natrual Science Foundation of Education Department of Inner Mongolia(NJZZ11013); China Postdoctoral Science Foundation,and Higher-level Talents of Inner Mongolia University (Z20090105) |
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| 摘 要： | (Ba0.5Sr0.5)1-xPrxCo0.8Fe0.2O3-δ(BSPCFx;x=0.00-0.30) oxides were synthesized by a sol-gel thermolysis process using combination of PVA and urea,and were also investigated as cathode material for intermediate temperature solid oxide fuel cells(IT-SOFCs).X-ray diffraction(XRD) results showed that all the samples formed a single phase cubic pervoskite-type structure after being calcined at 950 oC for 5 h and the lattice constant decreased with the Pr content increasing.The electrical conductivity of Ba0.5Sr0.5Co0.8Fe0.2O3-δ(BSCF) was greatly enhanced by Pr-doping.The thermal expansion coefficient(TEC) of BSPCFx was increased with the content of Pr increasing,and all the thermal expansion curves had an inflection at about 250-400 oC due to the thermal-induced lattice oxygen loss and the reaction of Co and Fe ion.Ac impedance analysis indicated that BSPCFx possessed better electrochemical performance.The polarization resistance of the sample with x=0.2 was only ～0.948 Ω cm2 at 500 oC,significantly lower than that of BSCF(～2.488 Ω cm2).
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| 关 键 词： | IT-SOFCs cathode thermal expansion electrochemical properties rare earths |
| 收稿时间： | 19 May 2011 |
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