---
_id: '7330'
abstract:
- lang: eng
text: Polymer electrolyte fuel cells (PE fuel cells) working with air at low stoichiometries
(<2.0) and standard electrochemical components show a high degree of inhomogeneity
in the current density distribution over the active area. An inhomogeneous current
density distribution leads to a non-uniform utilization of the active area, which
could negatively affect the time of life of the cells. Furthermore, it is also
believed to lower cell performance. In this work, the homogenization of the current
density, realized by means of tailored cathodes with along-the-air-channel redistributed
catalyst loadings, is investigated. The air stoichiometry range for which a homogenization
of the current density is achieved depends upon the gradient with which the catalyst
is redistributed along the air channel. A gentle increasing catalyst loading profile
homogenizes the current density at relatively higher air stoichiometries, while
a steeper profile is suited better for lower air stoichiometries. The results
show that a homogenization of the current density by means of redistributed catalyst
loading has negative effects on cell performance. Model calculations corroborate
the experimental findings on homogenization of the current density and deliver
an explanation for the decrease in cell performance.
article_processing_charge: No
article_type: original
author:
- first_name: M.
full_name: Santis, M.
last_name: Santis
- first_name: Stefan Alexander
full_name: Freunberger, Stefan Alexander
id: A8CA28E6-CE23-11E9-AD2D-EC27E6697425
last_name: Freunberger
orcid: 0000-0003-2902-5319
- first_name: A.
full_name: Reiner, A.
last_name: Reiner
- first_name: F.N.
full_name: Büchi, F.N.
last_name: Büchi
citation:
ama: Santis M, Freunberger SA, Reiner A, Büchi FN. Homogenization of the current
density in polymer electrolyte fuel cells by in-plane cathode catalyst gradients.
Electrochimica Acta. 2006;51(25):5383-5393. doi:10.1016/j.electacta.2006.02.008
apa: Santis, M., Freunberger, S. A., Reiner, A., & Büchi, F. N. (2006). Homogenization
of the current density in polymer electrolyte fuel cells by in-plane cathode catalyst
gradients. Electrochimica Acta. Elsevier. https://doi.org/10.1016/j.electacta.2006.02.008
chicago: Santis, M., Stefan Alexander Freunberger, A. Reiner, and F.N. Büchi. “Homogenization
of the Current Density in Polymer Electrolyte Fuel Cells by In-Plane Cathode Catalyst
Gradients.” Electrochimica Acta. Elsevier, 2006. https://doi.org/10.1016/j.electacta.2006.02.008.
ieee: M. Santis, S. A. Freunberger, A. Reiner, and F. N. Büchi, “Homogenization
of the current density in polymer electrolyte fuel cells by in-plane cathode catalyst
gradients,” Electrochimica Acta, vol. 51, no. 25. Elsevier, pp. 5383–5393,
2006.
ista: Santis M, Freunberger SA, Reiner A, Büchi FN. 2006. Homogenization of the
current density in polymer electrolyte fuel cells by in-plane cathode catalyst
gradients. Electrochimica Acta. 51(25), 5383–5393.
mla: Santis, M., et al. “Homogenization of the Current Density in Polymer Electrolyte
Fuel Cells by In-Plane Cathode Catalyst Gradients.” Electrochimica Acta,
vol. 51, no. 25, Elsevier, 2006, pp. 5383–93, doi:10.1016/j.electacta.2006.02.008.
short: M. Santis, S.A. Freunberger, A. Reiner, F.N. Büchi, Electrochimica Acta 51
(2006) 5383–5393.
date_created: 2020-01-15T12:23:34Z
date_published: 2006-07-01T00:00:00Z
date_updated: 2021-01-12T08:13:07Z
day: '01'
doi: 10.1016/j.electacta.2006.02.008
extern: '1'
intvolume: ' 51'
issue: '25'
language:
- iso: eng
month: '07'
oa_version: None
page: 5383-5393
publication: Electrochimica Acta
publication_identifier:
issn:
- 0013-4686
publication_status: published
publisher: Elsevier
quality_controlled: '1'
status: public
title: Homogenization of the current density in polymer electrolyte fuel cells by
in-plane cathode catalyst gradients
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 51
year: '2006'
...