Parametric study on interfacial crack propagation in solid oxide fuel cell based on electrode material
Parametric study on interfacial crack propagation in solid oxide fuel cell based on electrode material
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DOI：
10.1016/j.ijhydene.2021.12.153
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发表时间：
2022-01
影响因子：
7.2
通讯作者：
Jiamiao Xie;W. Hao;Fenghui Wang
中科院分区：
文献类型：
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作者：
Jiamiao Xie;W. Hao;Fenghui Wang
界面分层是固体氧化物燃料电池的典型失效模式之一，是由界面裂纹扩展引起的。为了提高电池的稳定性、耐久性和机械完整性，研究了电极材料性能对界面裂纹扩展的影响。在大量实验数据的基础上，阴阳极材料模型采用近似线性模型，通过改变材料参数，即电极与电解液的弹性模数与热膨胀系数之比，确定了不同的材料优化方案。以裂纹能量释放率和裂纹扩展长度为重要目标函数，比较了不同材料优化方案下界面裂纹扩展的程度。分析了电极材料参数与界面裂纹扩展行为之间的内在联系，得出了降低单元内分层可能性的电极材料优化方案。该研究为提高固体氧化物燃料电池的稳定性和完整性提供了指导。
Interfacial delamination is one of the typical failure modes of solid oxide fuel cell, which is caused by interfacial crack propagation. In order to improve the stability, durability and mechanical integrity of the cell, the influence of electrode material properties on the interfacial crack propagation is studied. Based on a large number of experimental data, the material model of anode and cathode adopts approximate linear model and the different material optimization schemes are set by changing the material parameters, i.e., the ratio of elastic modulus and thermal expansion coefficient between electrode and electrolyte. The crack energy release rate and crack propagation length are taken as important objective functions to compare the extent of interfacial crack propagation under different material optimization schemes. The internal relationship between electrode material parameters and interfacial crack propagation behavior is analyzed, and the optimization scheme of electrode material is obtained to reduce the possibility of delamination in the cell. This research provides guidance for the improvement of stability and integrity of solid oxide fuel cell.