An insight into the effects of B-site transition metals on the activity, activation effect and stability of perovskite oxygen electrodes for solid oxide electrolysis cells
An insight into the effects of B-site transition metals on the activity, activation effect and stability of perovskite oxygen electrodes for solid oxide electrolysis cells
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深入探讨B位过渡金属对固体氧化物电解电池钙钛矿氧电极活性、活化效果和稳定性的影响
DOI：
10.1016/j.jpowsour.2017.07.118
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发表时间：
2017-09
影响因子：
9.2
通讯作者：
Liu Yihui
中科院分区：
文献类型：
--
作者：
Bi Jiaxin;Yang Shengbing;Zhong Shaohua;Wang Jian-Qiang;Fan Chou;Chen Xinbing;Liu Yihui
本文讨论了（La0.6Sr0.4）XO 3-δ（X = Mn，Fe，Co）钙钛矿结构中B位过渡金属（TM）对高温电解过程中氧电极活性和稳定性的影响，以加深对阳极极化下不同氧电极所观察到的现象的理解。当TM从Mn变为Fe和Co时，电极的性能和稳定性在800 °C下显著变化，这归因于材料的不同离子电导率和表面化学，其对TM的价态和电子结构具有强烈的依赖性。在800 °C下，在200 mA cm− 2的阳极电流通过下，（La0.6Sr0.4）MnO 3-δ（LSM）电极在1200 min的测试过程中显著降低了1.75 Ω cm 2和101 mV，与（La_（0.6）Sr_（0.4））FeO_（3-δ）（LSF）和（La_（0.6）Sr_（0.4）CoO_（3-δ）（LSC））电极的RE和η的恒定值相比较，表明B位TMs对电极性能和稳定性的影响。在（La0.6Sr0.4）MnO 3-δ电极上观察到最严重的降解，这是由于电极/电解质界面附近的SrO表面偏析和LSM颗粒的相关崩解引起的电极脱离。
Here, effects of B-site transition metals (TMs) in the (La0.6Sr0.4)XO3-δ(X = Mn, Fe, Co) perovskite structure on the activity and stability of the oxygen electrodes during high temperature electrolysis are discussed to provide a deep understanding of the phenomena observed for different oxygen electrodes under anodic polarizations. Performance and stability of the electrodes vary significantly at 800 °C as the TMs changed from Mn to Fe and Co, which is attributed to the different ionic conductivities and surface chemistry of the materials that have a strong dependence on the valence state and electronic structure of TMs. Under an anodic current passage of 200 mA cm−2at 800 °C, electrode polarization resistance (RE) and overpotential (η) of the (La0.6Sr0.4)MnO3-δ(LSM) electrode decrease significantly by 1.75 Ω cm2and 101 mV during the 1200 min test, compared with the constant values ofREandηfor the (La0.6Sr0.4)FeO3-δ(LSF) and (La0.6Sr0.4)CoO3-δ(LSC) electrodes, an indication of the influence of B-site TMs on the electrode performance and stability. Most serious degradation is observed at the (La0.6Sr0.4)MnO3-δelectrode due to the electrode detachment arising from the accelerated SrO surface segregation and related disintegration of LSM particles near the electrode/electrolyte interface.
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影响因子：
2.8
作者：
Y. Zheng;T. Chen;Q. Li;W. Wu;H. Miao;C. Xu;W. Wang
通讯作者：
Y. Zheng;T. Chen;Q. Li;W. Wu;H. Miao;C. Xu;W. Wang
影响因子：
6.6
作者：
J. Van Herle;A.J. McEvoy;K. Thampi
通讯作者：
J. Van Herle;A.J. McEvoy;K. Thampi
影响因子：
9.2
作者：
Y. Zhen;Jian Li;S. Jiang
通讯作者：
Y. Zhen;Jian Li;S. Jiang
影响因子：
7.2
作者：
J. O'Brien;M. McKellar;E. Harvego;C. Stoots
通讯作者：
J. O'Brien;M. McKellar;E. Harvego;C. Stoots
影响因子：
3.2
作者：
TAI, LW;NASRALLAH, MM;SEHLIN, SR
通讯作者：
SEHLIN, SR