In-situ temperature monitoring directly from cathode surface of an operating solid oxide fuel cell
In-situ temperature monitoring directly from cathode surface of an operating solid oxide fuel cell
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DOI：
10.1016/j.apenergy.2020.116013
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发表时间：
2020-12
期刊：
影响因子：
11.2
通讯作者：
E. Guk;M. Ranaweera;V. Venkatesan;Jung-Sik Kim;Woochul Jung
中科院分区：
文献类型：
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作者：
E. Guk;M. Ranaweera;V. Venkatesan;Jung-Sik Kim;Woochul Jung
固体氧化物燃料电池的电极温度分布是一个重要的参数，要考虑更好地了解电池的性能和它的温度相关的退化。目前测量气体通道温度的努力不能准确地揭示电池表面温度分布。因此，作者提出了一种电池集成的多结热电偶阵列，以测量工作的固体氧化物燃料电池的电极温度分布。在这项工作中，作者在商业来源的固体氧化物燃料电池的阴极上沉积了薄膜/线多通道热阵列。在不同的氢和氮的燃料组成下测量电池的温度。多通道阵列显示出与燃料流速和电池性能的良好温度相关性，而商业热电偶显示出非常迟钝的响应（热电偶和多通道阵列之间的10 ~ 20 °C差异）。此外，通过多通道阵列的电池温度测量能够检测潜在的燃料交叉。这种诊断方法被应用到一个工作的固体氧化物燃料电池，产生洞察到关键的退化模式，包括气体泄漏引起的温度不稳定性，其关系到理论开路电压和电流输出，和传播的结构退化。可以设想，多热电偶阵列技术的使用可以导致电化学能量装置（如燃料电池和电池及其安全特征）和其他难以到达的装置（如内燃机或涡轮机叶片内部）的设计的显著改进。
The electrode temperature distribution of a solid oxide fuel cell is an important parameter to consider for gaining better insight into the cell performance and its temperature-related degradations. The present efforts of measuring gas channel temperatures do not accurately reveal the cell surface temperature distribution. Therefore, the authors propose a cell-integrated multi-junction thermocouple array to measure the electrode temperature distribution from a working solid oxide fuel cell. In this work, the authors deposited a thin film/wire multi-channel thermal array on the cathode of a commercially-sourced solid oxide fuel cell. The temperature of the cell was measured under varying fuel compositions of hydrogen and nitrogen. The multi-channel array showed excellent temperature correlation with the fuel flow rate and with the cell’s performance whilst commercial thermocouples showed a very dull response (10 ~ 20 °C discrepancy between thermocouples and the multi-channel array). Furthermore, cell temperature measurements via the multi-channel array enabled detecting potential fuel crossover. This diagnostic approach is applied to a working solid oxide fuel cell, yielding insights into key degradation modes including gas-leakage induced temperature instability, its relation to the theoretical open circuit voltage and current output, and propagation of structural degradation. It is envisaged that the use of the multi-thermocouple array techniques could lead to significant improvements in the design of electrochemical energy devices, like fuel cells and batteries and their safety features, and other hard-to-reach devices such as inside an internal combustion engine or turbine blades.