Dynamic analysis of current overshoots in reversible solid oxide cells
Dynamic analysis of current overshoots in reversible solid oxide cells
复制标题
可逆固体氧化物电池中电流过冲的动态分析
DOI：
10.1016/j.ijhydene.2021.08.048
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发表时间：
2021
影响因子：
7.2
通讯作者：
Kai Wu
中科院分区：
文献类型：
--
作者：
Zheng Zong;Jun Zhou;Zihang Zhang;Hongfei Zhao;Junkai Wang;Wanli Ma;Kai Wu
可逆固体氧化物电池（RSOC）由于其能量转换和存储的多功能性而引起了广泛的关注。该设备可用作燃料电池 (FC) 或电解槽电池 (EC)，具有卓越的效率。然而，其动态响应复杂，可能会导致在可逆电池模式下工作时电流出现较大超调，从而损害RSOC的长期稳定性。尽管一些研究报告了超调现象，但其机制及其对细胞性能的影响目前仍不清楚。在这项工作中，我们构建了 3D 动态平面 RSOC 模型来研究超调的详细行为。结果表明，开关模式条件下会引起RSOC电流过冲。特别是在从 EC 到 FC 的切换模式下，可以观察到更大的电流过冲。电流超调主要是由负载变化、气体扩散减慢以及RSOC中温度分布差异引起的。
Reversible solid oxide cell (RSOC) has attracted significant attention due to its multi-functionalities for energy conversion and storage. This device works as a fuel cell (FC) or an electrolyzer cell (EC) with superior efficiency. However, its dynamic response is complex and may cause a large overshoot of current operated in reversible cell mode, which impairs the long-term stability of RSOC. Although several works report the overshoot phenomenon, the mechanism and effects on cell performance are still unclear so far. In this work, we build a 3D dynamic planar RSOC model to investigate the detailed behavior of overshoot. The results show that the overshoot of current for RSOC can be caused under switching mode conditions. Especially a larger overshoot of current can be observed within switching mode from EC to FC. The overshoot of current is mainly caused by the load change, slower gas diffusion, and differentiated temperature distribution in RSOC.