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Electrochemical Impedance Modeling of a Solid Oxide Fuel Cell Anode
Author(s) -
Mohammadi R.,
Søgaard M.,
Ramos T.,
Ghassemi M.,
Mogensen M. B.
Publication year - 2014
Publication title -
fuel cells
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.485
H-Index - 69
eISSN - 1615-6854
pISSN - 1615-6846
DOI - 10.1002/fuce.201300292
Subject(s) - anode , electrical impedance , materials science , electrode , solid oxide fuel cell , electrochemistry , mechanics , parametric statistics , transmission line , analytical chemistry (journal) , chemistry , computer science , physics , electrical engineering , chromatography , mathematics , engineering , telecommunications , statistics
A simulation package for the impedance response of SOFC anodes is presented here. The model couples the gas transport in gas channels and within a porous electrode with the electrochemical kinetics. The gas phase mass transport is modeled using mass conservation equations. A transmission line model (TLM), which is suitably modified to account for the electrode microstructural details, is used for modeling the impedance arising from the electrochemical reactions. In order to solve the system of nonlinear equations, an in‐house code based on the finite difference method was developed. Some of the model constants have been calibrated against experimental data. It is demonstrated that the simulation tool is capable of predicting the impedance response of an experimental data set obtained on symmetrical cells with Ni/ScYSZ SOFC anodes. A parametric study is also carried out using the developed simulation tool and the results are further discussed.