elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Impressum | Datenschutz | Kontakt | English
Schriftgröße: [-] Text [+]

Reversible and Irreversible Degradation Rates Determined in PEM Fuel Cells

Mitzel, Jens und Gazdzicki, Pawel und Biswas, Indro und Schulze, Mathias und Friedrich, K. Andreas (2016) Reversible and Irreversible Degradation Rates Determined in PEM Fuel Cells. Electrochemistry 2016, 2016-09-26 - 2016-09-28, Mainz, Germany.

[img] PDF
12kB

Kurzfassung

One of the major challenges for the commercialization of polymer electrolyte membrane fuel cells (PEMFCs) is the limited lifetime due to degradation processes of the different fuel cell components. The investigation of the underlying degradation mechanisms and mitigation strategies for fuel cell operation and for material development are key factors for PEMFC research and development. This presentation is focused on reversible and irreversible degradation phenomena in PEMFCs. A new systematic approach for the analysis of reversible and irreversible degradation rates in an operating fuel cell will be introduced. A detailed description of voltage loss rates and particularly of the discrimination between reversible and irreversible voltage losses will be given. A major motivation of the presented work is the lack of common testing procedures and determination approaches of voltage losses in durability tests of fuel cell. This issue results in severe difficulties in the comparison of results obtained by different testing facilities. This is limiting factor for the development of fuel cell components because the results within different research projects cannot be correlated, especially if only one value for a degradation rate is reported, e.g. for defined current density and defined test operating conditions. In order to systematically analyze voltage losses durability measurements of several hundreds of hours were performed in PEMFC single cells and stacks. Specific test protocols containing regular refresh procedures were used for this purpose. This enables to distinguish between reversible and irreversible voltage losses. To test the refresh procedures and analyze their effect on cell performance, parameters such as the duration of e.g. a soak time step have been varied. Between these refresh steps the cells were typically operated for 50 to 150 h. For in-situ diagnostics of the operated cells performance curves, HFR (high frequency resistant) measurements, and CVs (cyclic voltammograms) were recorded in order to determine the impact of the refresh procedures on the cells.

elib-URL des Eintrags:https://elib.dlr.de/108079/
Dokumentart:Konferenzbeitrag (Poster)
Titel:Reversible and Irreversible Degradation Rates Determined in PEM Fuel Cells
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Mitzel, JensJens.Mitzel (at) dlr.dehttps://orcid.org/0000-0001-8137-9689NICHT SPEZIFIZIERT
Gazdzicki, Pawelpawel.gazdzicki (at) dlr.dehttps://orcid.org/0000-0002-5728-7861NICHT SPEZIFIZIERT
Biswas, Indroindro.biswas (at) dlr.dehttps://orcid.org/0000-0002-6815-4204NICHT SPEZIFIZIERT
Schulze, MathiasNICHT SPEZIFIZIERTNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Friedrich, K. Andreasandreas.friedrich (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:26 September 2016
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:PEMFC Degradation rates Reversible Degradation Irreversible Degradation
Veranstaltungstitel:Electrochemistry 2016
Veranstaltungsort:Mainz, Germany
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:26 September 2016
Veranstaltungsende:28 September 2016
HGF - Forschungsbereich:Energie
HGF - Programm:Speicher und vernetzte Infrastrukturen
HGF - Programmthema:Brennstoffzellen
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E EV - Energieverfahrenstechnik
DLR - Teilgebiet (Projekt, Vorhaben):E - Elektrochemische Prozesse (Brennstoffzellen) (alt)
Standort: Stuttgart
Institute & Einrichtungen:Institut für Technische Thermodynamik > Elektrochemische Energietechnik
Hinterlegt von: Mitzel, Dr. Jens
Hinterlegt am:22 Nov 2016 09:32
Letzte Änderung:24 Apr 2024 20:13

Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags

Blättern
Suchen
Hilfe & Kontakt
Informationen
electronic library verwendet EPrints 3.3.12
Gestaltung Webseite und Datenbank: Copyright © Deutsches Zentrum für Luft- und Raumfahrt (DLR). Alle Rechte vorbehalten.