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Impedance study on oxygen diffusion through fuel cell cathode catalyst layer at high current
journal contribution
posted on 2015-08-21, 14:53 authored by Samuel Cruz-Manzo, Pratap Rama, Rui ChenA mathematical model to simulate the electrochemical impedance spectrum in the frequency domain and the current distribution
in the time domain of polymer electrolyte fuel cell cathode catalyst layer CCL operated at high currents has been developed. In
the model, Fick’s second law in the frequency domain is solved to define oxygen distribution through CCL. The rate of oxygen
transportation and proton conductivity are related to the current distribution equation reported in the authors’ previous study for
low current operations. The model, compared against the frequency response of an experimental impedance spectrum, is then
converted into the time domain using the inverse Laplace transform method. The results show the nonsteady oxygen diffusion in
the CCL which allows equilibrium to be established between the bulk concentration supplied at the gas diffusion layer boundary
and the surface concentration of the oxygen within the CCL. The developed model can be applied to unveil the effect of kinetic,
ohmic, and mass transport mechanisms on current distribution through the thickness of the CCL from the measured impedance
results.
Funding
The authors thank the Mexican National Council for Science and Technology CONACYT for the sponsorship of the Ph.D research study of S. Cruz-Manzo Grant no. 183195 . Loughborough University assisted in meeting the publication costs of this article.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Aeronautical and Automotive Engineering
Published in
JOURNAL OF THE ELECTROCHEMICAL SOCIETYVolume
157Issue
12Pages
B1865 - B1871 (7)Citation
CRUZ-MANZO, S., RAMA, P. and CHEN, R., 2010. Impedance study on oxygen diffusion through fuel cell cathode catalyst layer at high current. Journal of the Electrochemical Society, 157 (12), pp. B1865 - B1871.Publisher
© Electrochemical SocietyVersion
- AM (Accepted Manuscript)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2010Notes
This article was accepted for publication in the Journal of the Electrochemical Society [© Electrochemical Society]. The definitive version is available at: http://dx.doi.org/10.1149/1.3502569ISSN
0013-4651Publisher version
Language
- en