用于中温固体氧化物燃料电池的纳米级氧化铋浸渍的（La，Sr）MnO <sub>3</sub>阴极,Journal of Power Sources

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用于中温固体氧化物燃料电池的纳米级氧化铋浸渍的（La，Sr）MnO ₃阴极
Journal of Power Sources ( IF 8.1 ) Pub Date : 15 October 2008 , DOI: 10.1016/j.jpowsour.2008.07.003
Zhiyi Jiang , Lei Zhang , Kai Feng , Changrong Xia

氧化铋基氧离子导体被掺入（La，Sr）MnO _3中（LSM）是用于固体氧化物燃料电池（SOFC）的经典阴极材料，可改善阴极性能。以氧化钇稳定的氧化铋（YSB）为例，并浸渍到预制的多孔LSM框架中，形成了具有掺杂二氧化铈电解质的中温SOFC（IT-SOFC）的高活性阴极。X射线衍射表明，YSB在低于800°C的中间温度下与LSM具有化学相容性。浸渍的YSB颗粒是纳米尺寸的，并沉积在框架的表面上。通过将纳米级YSB引入LSM电极，可以显着提高性能。在600°C下，浸渍有50％YSB的电极在开路条件下的界面极化电阻仅为纯LSM电极原始值的1.3％。当电流通过时，电阻会大大降低。此外，在基于LSM的电极中，YSB浸渍的LSM电极具有最高的电化学性能。具有25％的YSB浸渍LSM阴极的单电池产生300 mW cm的最大功率密度在600°C时为^-2，表明使用基于LSM的电极用于IT-SOFC的希望。

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Nanoscale bismuth oxide impregnated (La,Sr)MnO3 cathodes for intermediate-temperature solid oxide fuel cells

Bismuth oxide based oxygen ion conductors are incorporated into (La,Sr)MnO₃ (LSM), the classical cathode material for solid oxide fuel cells (SOFC), to improve the cathode performance. Yttria-stabilized bismuth oxide (YSB) is taken as an example and is impregnated into a preformed porous LSM frame, forming a highly active cathode for intermediate-temperature SOFCs (IT-SOFCs) with doped ceria electrolytes. X-ray diffraction indicates that YSB is chemically compatible with LSM at intermediate temperatures below 800 °C. The impregnated YSB particles are nanosized and are deposited on the surface of the framework. Significant performance improvement is achieved by introducing nanosized YSB into the LSM electrodes. At 600 °C, the interfacial polarization resistance under open-circuit conditions for electrodes impregnated with 50% YSB is only 1.3% of the original value for a pure LSM electrode. The resistance is further reduced dramatically when current is passed through. In addition, the YSB impregnated LSM electrodes has the highest electrochemical performance among those based on LSM. Single cell with 25% of YSB impregnated LSM cathode generates maximum power density of 300 mW cm⁻² at 600 °C, indicating the promise of using LSM-based electrodes for IT-SOFC.

更新日期：2017-01-31

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