3D finite element model for reconstructed mixed-conducting cathodes

• Verfasst von: Carraro, Thomas [VerfasserIn]
• Titel: 3D finite element model for reconstructed mixed-conducting cathodes
• Titelzusatz: II. Parameter sensitivity analysis
• Verf.angabe: Thomas Carraro, Jochen Joos, Bernd Rüger, André Weber, Ellen Ivers-Tiffée
• Umfang: 6 S.
• Fussnoten: Gesehen am 27.04.2018
• Titel Quelle: Enthalten in: Electrochimica acta
• Jahr Quelle: 2012
• Band/Heft Quelle: 77(2012), S. 309-314
• ISSN Quelle: 1873-3859
• DOI: doi:10.1016/j.electacta.2012.04.163
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1572436670

Abstract

A micro-model for the calculation of the area specific resistance ASRcat of 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.