Aalborg Universitet
Model Estimation of HTPEM Mea Parametersfrom EIS and IV Curves
Vang, Jakob Rabjerg; Zhou, Fan
Publication date:
2015
Document Version
Accepted author manuscript, peer reviewed version Link to publication from Aalborg University
Citation for published version (APA):
Vang, J. R., & Zhou, F. (2015). Model Estimation of HTPEM Mea Parametersfrom EIS and IV Curves. Abstract from Electrochemical science and technology conference 2015, København, Denmark.
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MODEL ESTIMATION OF
Jakob Rabjerg VANG
1Aalborg University
Impedance spectra can be a valuable supplement characterising a fuel cell
presents a finite-volume based
for estimating MEA parameters from impedance spectra and polarisation curves by simultaneous fitting. One of the challenges in the model development concerns the modelling of the catalyst layer.
different assumptions on the fit and the One of the most important ch
different CL models have been implemented. One assumes that the
sits on the surface of the carbon substrate and is covered by a thin film of phosphoric acid (PA). The other approach assumes that t
collected in agglomerates flooded with Note that the agreement with the data is parameter values estimated
literature and are mostly similar regardless of the CL model.
content, the CL thickness
between CL models. The discrepancies relate to differences in reactant transport characteristics of the CL models
values. This is assumed to result from PA migration during operation.
The model is suitable for the analysis
MODEL ESTIMATION OF HTPEM MEA PARAMETERS FROM EIS AND IV CURVES
Jakob Rabjerg VANG1, Fan ZHOU1 Aalborg University, Denmark, jrv@et.aau.dk
Impedance spectra can be a valuable supplement to polarisation curves when fuel cell membrane-electrode-assembly (MEA).
volume based high temperature PEM (HTPEM)
parameters from impedance spectra and polarisation curves One of the challenges in the model development concerns the modelling of the catalyst layer. This work explores the impact of some of the different assumptions on the fit and the estimated MEA parameters.
One of the most important choices is that of catalyst layer have been implemented. One assumes that the
sits on the surface of the carbon substrate and is covered by a thin film of The other approach assumes that the catalyst particles d in agglomerates flooded with PA. The fits are compared in the figures.
Note that the agreement with the data is similar for the two catalyst models. The estimated generally agree well with available data literature and are mostly similar regardless of the CL model.
content, the CL thickness, and the surface area of the CL pores
The discrepancies relate to differences in reactant transport istics of the CL models. The PA content also deviates from literature values. This is assumed to result from PA migration during operation.
The model is suitable for the analysis of data from degradation
MEA PARAMETERS FROM EIS
jrv@et.aau.dk
to polarisation curves when assembly (MEA). This work high temperature PEM (HTPEM) fuel cell model parameters from impedance spectra and polarisation curves One of the challenges in the model development concerns This work explores the impact of some of the
ed MEA parameters.
oices is that of catalyst layer (CL) model. Two have been implemented. One assumes that the Pt catalyst sits on the surface of the carbon substrate and is covered by a thin film of he catalyst particles are The fits are compared in the figures.
for the two catalyst models. The agree well with available data from literature and are mostly similar regardless of the CL model. Only the CL PA and the surface area of the CL pores vary significantly The discrepancies relate to differences in reactant transport . The PA content also deviates from literature values. This is assumed to result from PA migration during operation.
degradation tests.