Degradation mechanisms of La-Sr-Co-Fe-O3SOFC cathodes
Degradation mechanisms of La-Sr-Co-Fe-O3SOFC cathodes
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DOI：
10.1149/1.2266160
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发表时间：
2006-01-01
影响因子：
--
通讯作者：
Stevenson, J. W.
中科院分区：
文献类型：
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作者：
Simner, S. P.;Anderson, M. D.;Stevenson, J. W.
采用（La0.6Sr0.4）（0.98）Co0.2Fe0.8O3-delta （LSCF-6428）阴极（含Ce0.8Sm0.2O1.9阴极-电解质中间层）的阳极负载钇稳定氧化锆电解质固体氧化物燃料电池（SOFCs）的长期稳定性进行了评估。在750℃和0.7 V下测试500小时的样品表明功率下降了30%。虽然扫描电镜和能量色散x射线分析没有发现明显的微观结构或化学现象可以解释高降解，但x射线光子光谱显示，在阴极-电解质和阴极-电流集电极界面富集的Sr至少是观察到的降解的部分原因。(c) 2006电化学学会。
The long-term stability of anode-supported yttria-stabilized zirconia electrolyte solid oxide fuel cells (SOFCs) utilizing (La0.6Sr0.4)(0.98)Co0.2Fe0.8O3-delta (LSCF-6428) cathodes (incorporating Ce0.8Sm0.2O1.9 cathode-electrolyte interlayers) was assessed. Specimens tested for 500 h at 750 degrees C and 0.7 V indicated >30% power degradation. While scanning electron microscopy and energy dispersive X-ray analysis indicated no obvious microstructural or chemical phenomena that could explain the high degradation, X-ray photon spectroscopy revealed that enrichment of Sr at the cathode-electrolyte and cathode-current collector interfaces was at least partially responsible for the observed degradation. (c) 2006 The Electrochemical Society.