A parametric analysis of concentration losses in an anode of a solid oxide fuel cell

Abstract The purpose of this paper is to discuss the loss of voltage in a Solid Oxide Fuel Cell (SOFC) as a result of the irreversible diffusive transport of gases through the microscopic pores of its fuel electrode. The voltage loss is estimated by solving the diffusive-convective equations, and cu...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 2367; no. 1; pp. 12009 - 12015
Main Authors Prokop, T, Brus, G, Szmyd, J
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.11.2022
Subjects
Diffusion layers
Electric potential
Electrodes
Empirical analysis
Interpolation
Ion beams
Mass transport
Mathematical models
Molecular diffusion
Parametric analysis
Parametric statistics
Physics
Solid oxide fuel cells
Thickness
Voltage
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Summary:Abstract The purpose of this paper is to discuss the loss of voltage in a Solid Oxide Fuel Cell (SOFC) as a result of the irreversible diffusive transport of gases through the microscopic pores of its fuel electrode. The voltage loss is estimated by solving the diffusive-convective equations, and current conduction equations in a computational domain based on data from Focused Ion Beam Scanning Electron Microscopy. The simulation includes both the binary diffusion and the free-molecular diffusion phenomena by employing Cylindrical Pore Interpolation Model. Butler-Volmer model is used to compute the reaction rate. Ion and electron current conduction is based on empirical relationships reported in the literature. The total losses are decomposed to identify the contribution of the mass transport irreversibilities. The parametric study results form a concave surface, showing non-linear relationship between electrode thickness, and diffusion-related voltage losses. The optimal active layer thickness is estimated.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2367/1/012009