Reasons for the high stability of nano-structured (La,Sr)MnO3 infiltrated Y2O3–ZrO2 composite oxygen electrodes of solid oxide electrolysis cells
Reasons for the high stability of nano-structured (La,Sr)MnO3 infiltrated Y2O3–ZrO2 composite oxygen electrodes of solid oxide electrolysis cells
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DOI：
10.1016/j.elecom.2012.03.033
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发表时间：
2012-06
影响因子：
5.4
通讯作者：
Kongfa Chen;N. Ai;S. Jiang
中科院分区：
文献类型：
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作者：
Kongfa Chen;N. Ai;S. Jiang
纳米结构（La，Sr）MnO 3渗透Y2 O3-ZrO 2（LSM-YSZ）氧电极在固体氧化物电解槽（SOECs）运行条件下表现出优异的活性和性能稳定性。通过用LSM硝酸盐溶液渗透预烧结的YSZ支架，然后在900或1100°C下热处理来制备LSM-YSZ复合电极。在900°C下热处理的电极在800°C下表现出低至0.21 μ cm-2的电极极化电阻，并且在500 mAcm-2下电解操作100 h时相对稳定，而在1100°C下热处理的电极显示出随着电解极化的增加而增加的稳定性。结果清楚地表明，在阳极电解条件下的LSM晶格收缩抑制了渗透的LSM纳米颗粒的团聚和晶粒生长，导致高度稳定的纳米结构的LSM-YSZ电极结构。
Nano-structured (La,Sr)MnO3infiltrated Y2O3–ZrO2(LSM–YSZ) oxygen electrodes show excellent activity and performance stability under solid oxide electrolysis cells (SOECs) operation conditions. LSM–YSZ composite electrodes are prepared by infiltrating pre-sintered YSZ scaffold with LSM nitrate solution, followed by heat-treatment at 900 or 1100°C. The electrodes heat-treated at 900°C exhibit an electrode polarization resistance as low as 0.21Ωcm2at 800°C and are relatively stable under electrolysis operation at 500mAcm−2for 100h, while the electrodes heat-treated at 1100°C show the increased stability with the electrolysis polarization. The results clearly indicate that LSM lattice shrinkage under anodic electrolysis conditions inhibits the agglomeration and grain growth of infiltrated LSM nanoparticles, leading to the highly stable nano-structured LSM–YSZ electrode structure.