3D finite element model for reconstructed mixed-conducting cathodes: II. Parameter sensitivity analysis
3D finite element model for reconstructed mixed-conducting cathodes: II. Parameter sensitivity analysis
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DOI：
10.1016/j.electacta.2012.04.163
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发表时间：
2012-08
影响因子：
6.6
通讯作者：
T. Carraro;Jochen Joos;B. Rüger;A. Weber;E. Ivers-Tiffée
中科院分区：
文献类型：
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作者：
T. Carraro;Jochen Joos;B. Rüger;A. Weber;E. Ivers-Tiffée
本文第一部分介绍了用于计算多孔混合离子电子导电 (MIEC) 阴极的面积比电阻 ASRcat 的微观模型，该模型解析了微观结构。四个过程被认为与该固体氧化物燃料电池 (SOFC) 模型的参数研究相关。这些包括电极和电解质之间的电荷转移过程以及多孔电极中的三个非电荷转移过程：（i）气体扩散，（ii）本体扩散和（iii）表面反应。在第二部分中，我们对描述这些过程的四个参数进行了系统的参数敏感性分析。我们定义了一个称为灵敏度因子的指数，可以定量确定重建 3D 微观结构的不同过程的重要性。
A micro-model for the calculation of the area specific resistance ASRcatof a porous mixed ionic electronic conducting (MIEC) cathode, which resolves the microstructure, has been presented in Part I of this article. Four processes are considered relevant for a parametric study of this solid oxide fuel cell (SOFC) model. These comprise a charge transfer process between the electrode and the electrolyte and three noncharge transfer processes in the porous electrode: (i) gas diffusion, (ii) bulk diffusion and (iii) surface reaction. In Part II we present a systematic parameter sensitivity analysis of the four parameters that describe these processes. We define an index called sensitivity factor that allows the quantitative determination of the importance of the different processes for a reconstructed 3D microstructure.