Spatial Current and Temperature Variations in a Microtubular Solid Oxide Electrolysis Cell In-Situ Analyzed with Electrode-Segmentation Method
Spatial Current and Temperature Variations in a Microtubular Solid Oxide Electrolysis Cell In-Situ Analyzed with Electrode-Segmentation Method
复制标题
用电极分割法原位分析微管固体氧化物电解槽中的空间电流和温度变化
DOI：
10.1149/ma2021-031234mtgabs
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Ito Kohei
中科院分区：
文献类型：
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作者：
Xuefeng Wang;Nakajima Hironori;Ito Kohei
电流和温度的空间分布对固体氧化物电解槽的电化学性能有重要影响。关于电流和温度分布的数值预测已经有很多报道，而实验研究却很少。在本研究中，我们使用一种电极分割方法来研究阴极支撑的微管SOEC中的电流和温度的空间变化。电极分段法显示出各段之间的电流变化显著。随着电池电压的升高，中下游的电流密度小于上游的电流密度，这意味着细胞遭受了水饥饿。此外，随着电压的升高，各段的温度也随之升高。在上游观察到了最大的电流，这与那里最大的温升是一致的。最大的温度梯度出现在上游和中游之间
The spatial distribution of current and temperature plays important role in the electrochemical performance of Solid Oxide Electrolysis Cells (SOECs). Many numerical predictions of current and temperature distribution have been reported, whereas experimental investigations were rare. In this research, we are applying an electrode-segmentation method to investigate the spatial current and temperature variation in a cathode-supported microtubular SOEC. The electrode-segmentation method shows a remarkable current variation among the segments. The current densities of the midstream and downstream segments are smaller than the upstream segment with an increased cell voltage, implying that the cell suffers from water starvation. Besides, the temperature at each segment increases with the voltage increase. The largest current in the upstream segment is observed, which agrees with the largest temperature rise there. The largest temperature gradient happens between the upstream and midstream segments