Multiscale model for solid oxide fuel cell with electrode containing mixed conducting material
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Solid oxide fuel cells (SOFCs) with electrodes that contain mixed conducting materials usually show very different relationships among microstructure parameters, effective electrode characteristics, and detailed working processes from conventional ones. A new multiscale model for SOFCs using mixed conducting materials, such as LSCF or BSCF, was developed. It consisted of a generalized percolation micromodel to obtain the electrode properties from microstructure parameters and a multiphysics single cell model to relate these properties to performance details. Various constraint relationships between the activation overpotential expressions and electric boundaries for SOFC models were collected by analyzing the local electrochemical equilibrium. Finally, taking a typical LSCF-SDC/SDC/Ni-SDC intermediate temperature SOFC as an example, the application of the multiscale model was illustrated. The accuracy of the models was verified by fitting 25 experimental I-V curves reported in literature with a few adjustable parameters; additionally, and several conclusions were drawn from the analysis of simulation results.
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Periasamy, Vijay; Tadé, Moses; Shao, Zongping (2019)© 2019 Hydrogen Energy Publications LLC The electrode microstructure plays an important role in determining the performance of the Solid Oxide Fuel Cells (SOFCs). The conventional SOFC electrodes are based on two kinds ...
Placement of reference electrode, electrolyte thickness and three-electrode cell configuration in solid oxide fuel cells: A brief review and update on experimental approachJiang, San Ping (2017)Â© 2017 The Electrochemical Society. All rights reserved. Cell configuration and placement of reference electrode (RE) have been a subject of intensive interests to the solid oxide fuel cells (SOFCs) communities. Here, ...
Multi scale and physics models for intermediate and low temperatures H+-solid oxide fuel cells with H+/e-/O2- mixed conducting properties: Part A, generalized percolation theory for LSCF-SDC-BZCY 3-component cathodesChen, D.; Zhang, Q.; Lu, L.; Periasamy, V.; Tade, M.; Shao, Zongping (2016)© 2015 Elsevier B.V. All rights reserved. H+ based solid oxide fuel cell (SOFC) composite cathodes are generally agreed to be of quite different relationships among the microstructure parameters, electrode properties and ...