Effects of Polarization on the Microstructural Changes at the YSZ/Ni-YSZ Interface
Effects of Polarization on the Microstructural Changes at the YSZ/Ni-YSZ Interface
复制标题
极化对YSZ/Ni-YSZ界面微观结构变化的影响
DOI：
10.1149/09101.0641ecst
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
J. herle
中科院分区：
文献类型：
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作者：
G. Rinaldi;A. Nakajo;P. Caliandro;L. Navrátilová;J. herle
研究了燃料电池(SOFC)和电解模式(SOEC)运行后Ni在电解液界面附近的迁移对Ni-YSZ电极的影响。实验数据集包括在不同极化条件和持续时间下测试的一系列短栈。选定的区域已通过三维FIB-SEM系列切片进行了成像。经过重构和分割，量化了TPB密度、体积分数、二面角和界面曲率等度量性质和拓扑性质在垂直于YSZ电解液界面方向的空间变化。对它们的空间分布和时间演化进行了分析，以促进对YSZ电解液附近导致Ni贫化的驱动力的理解。
This study examines the effect of Ni migration near the interface with the electrolyte after fuel cell (SOFC) and electrolysis mode (SOEC) operation on nickel-yttria stabilized zirconia (Ni-YSZ) electrodes. The experimental dataset consists in a series of shortstacks tested under different polarization conditions and durations. Selected zones have been imaged by 3-D FIB-SEM serial sectioning. After reconstruction and segmentation, the spatial variations of metric and topological properties have been quantified along the direction perpendicular to the interface with the YSZ electrolyte, including TPB density, volume fraction, dihedral angles and interfacial curvature. Their spatial distribution and time evolution have been analysed to advance the understanding of the driving forces that cause Ni depletion near the YSZ electrolyte.