Evaluation of Mechanical Damages in SOFCs during Start/Stop Operation by Using Acoustic Emission Technique
Evaluation of Mechanical Damages in SOFCs during Start/Stop Operation by Using Acoustic Emission Technique
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DOI：
10.1149/07801.2355ecst
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发表时间：
2017-05
期刊：
影响因子：
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通讯作者：
K. Kumada;Kazuhisa Sato;T. Hashida
中科院分区：
文献类型：
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作者：
K. Kumada;Kazuhisa Sato;T. Hashida
固体氧化物燃料电池（SOFC）的机械耐久性和可靠性是其实现和工程应用的关键问题之一。为了实现这一目标，需要对机械损伤过程进行广泛而详细的研究。本文提出了一种用于检测阳极支撑电池（ASC）机械损伤的声发射（AE）方法。使用单电池进行启动/停止循环测试（RT 至 800°C 之间）。制备直径为20mm的NiO-YSZ/YSZ/GDC/LSCF-GDC/LSCF配置的电池，并将其密封在仅在阴极侧具有硼硅酸盐玻璃环的氧化铝管上。经过 2 个循环启动/停止循环后，电池没有出现任何损坏，并且其电性能保持不变。实验结果表明，本研究中采用的 AE 技术使我们能够区分电池的损坏和玻璃密封的破裂。根据结果，使用 AE 技术评估氧化还原处理期间的机械损伤。与氧化还原处理同时进行的电化学评估证明了声发射监测对于检测 SOFC 机械损伤的有效性和重要性。
The mechanical durability and reliability of solid oxide fuel cells (SOFCs) are one of the critical issues for their realizations and engineering applications. To achieve the goal, extensive and detailed investigations into the mechanical damage process are needed. This paper presents an acoustic emission (AE) method for detecting the mechanical damage in anode-supported cells (ASCs). Start/Stop cycle tests (between RT and 800°C) were carried out using single cells. The cells with a configuration of NiO-YSZ/YSZ/GDC/LSCF-GDC/LSCF of 20 mm in diameter were prepared and sealed on an alumina tube with a borosilicate glass ring only in the cathode side. After 2 cycle start/stop cycles, no damage was induced in the cells and their electrical performances were maintained without degradation. The experimental results indicated that the AE technique employed in this study allowed us to distinguish the damages in the cells from the cracking in the glass seals. Based on the result, the mechanical damages during redox treatments were evaluated using the AE technique. The electrochemical evaluation performed concurrently with the redox treatments demonstrated the validity and significance of AE monitoring for detecting mechanical damages in SOFCs.