2019/01/16 by Michał Wróbel, Wrobel, Michal, Grzegorz Brus +1
Chemical Engineering · Energy · Engineering · Materials Science · #Advancements in Solid Oxide Fuel Cells #Catalysis and Oxidation Reactions #Electrocatalysts for Energy Conversion #FOS: Mathematics #Fuel Cells and Related Materials #Numerical Analysis (math.NA)
paper · pdf · doi:10.48550/arxiv.1901.05509
openalex publication_date 2019/01/16 · openalex created_date 2022/07/30 · openalex updated_date 2026/07/28
In the paper a mathematical model of the PEN structure (positive electrode -\nelectrolyte - negative electrode) of the Solid Oxide Fuel Cell (SOFC) is\nanalyzed. It is proved that classical formulation of the problem leads\ninevitably to locally unphysical effects related to negative values of the\nactivation overpotential. Moreover, the active layers' thicknesses are shown to\nbe components of solution and cannot be predefined in an arbitrary way. A\nmodified mathematical formulation of the problem is proposed which includes\nthis novelty alongside an amended definition of the activation overpotential. A\ndedicated computational scheme is developed for the cathode sub-problem. The\naccuracy of computations is investigated by means of a newly introduced\nanalytical benchmark example. The numerical results obtained for LSCF cathode\nare used to discuss certain aspects of the modified formulation and the active\nlayer thickness. The new modelling approach is validated by comparison with\nexperimental data.\n