Gazdzicki, Pawel and Mitzel, Jens and Garcia Sanchez, Daniel and Schulze, Mathias and Friedrich, K. Andreas (2016) Evaluation of reversible and irreversible degradation rates of polymer electrolyte membrane fuel cells tested in automotive conditions. Journal of Power Sources, 327, pp. 86-95. Elsevier. doi: 10.1016/j.jpowsour.2016.07.049. ISSN 0378-7753.
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Official URL: http://dx.doi.org/10.1016/j.jpowsour.2016.07.049
Abstract
This work provides single cell durability tests of membrane electrode assemblies in dynamic operation regularly interrupted by recovery procedures for the removal of reversible voltage losses. Degradation rates at different loads in one single test can be determined from these tests. Hence, it is possible to report degradation rates versus current density instead of a single degradation rate value. A clear discrimination between reversible and irreversible voltage loss rates is provided. The irreversible degradation rate can be described by a linear regression of voltage values after the recovery steps. Using voltage values before refresh is less adequate due to possible impacts of reversible effects. The reversible contribution to the voltage decay is dominated by an exponential decay after restart, eventually turning into a linear one. A linear-exponential function is proposed to fit the reversible voltage degradation. Due to this function, the Degradation behavior of an automotive fuel cell can be described correctly during the first hours after restart. The fit parameters decay constant, exponential amplitude and linear slope are evaluated. Eventually, the reasons for the voltage recovery during shutdown are analyzed showing that ionomer effects in the catalyst layer and/or membrane seem to be the key factor in this process.
Item URL in elib: | https://elib.dlr.de/105216/ | ||||||||||||||||||||||||
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Document Type: | Article | ||||||||||||||||||||||||
Title: | Evaluation of reversible and irreversible degradation rates of polymer electrolyte membrane fuel cells tested in automotive conditions | ||||||||||||||||||||||||
Authors: |
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Date: | 21 July 2016 | ||||||||||||||||||||||||
Journal or Publication Title: | Journal of Power Sources | ||||||||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||||||||
Open Access: | Yes | ||||||||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||||||||
In SCOPUS: | Yes | ||||||||||||||||||||||||
In ISI Web of Science: | Yes | ||||||||||||||||||||||||
Volume: | 327 | ||||||||||||||||||||||||
DOI: | 10.1016/j.jpowsour.2016.07.049 | ||||||||||||||||||||||||
Page Range: | pp. 86-95 | ||||||||||||||||||||||||
Publisher: | Elsevier | ||||||||||||||||||||||||
ISSN: | 0378-7753 | ||||||||||||||||||||||||
Status: | Published | ||||||||||||||||||||||||
Keywords: | Polymer electrolyte membrane fuel cell Automotive Durability Irreversible degradation Reversible degradation Performance recovery | ||||||||||||||||||||||||
HGF - Research field: | Energy | ||||||||||||||||||||||||
HGF - Program: | Storage and Cross-linked Infrastructures | ||||||||||||||||||||||||
HGF - Program Themes: | Fuel cells | ||||||||||||||||||||||||
DLR - Research area: | Energy | ||||||||||||||||||||||||
DLR - Program: | E EV - Energy process technology | ||||||||||||||||||||||||
DLR - Research theme (Project): | E - Electrochemical Processes (Fuel Cells) (old) | ||||||||||||||||||||||||
Location: | Stuttgart | ||||||||||||||||||||||||
Institutes and Institutions: | Institute of Engineering Thermodynamics > Electrochemical Energy Technology | ||||||||||||||||||||||||
Deposited By: | Gazdzicki, Dr. Pawel | ||||||||||||||||||||||||
Deposited On: | 27 Jul 2016 11:20 | ||||||||||||||||||||||||
Last Modified: | 08 Nov 2023 15:21 |
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