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

DEGRADATION OF NICKEL ANODES DURING OPERATION IN ALKALINE FUEL CELL

Gülzow, Erich und Schulze, Mathias (2002) DEGRADATION OF NICKEL ANODES DURING OPERATION IN ALKALINE FUEL CELL. In: Fuel Cell Seminar 2002. Fuel Cell Sem inar 2002, 2002-11-18 - 2002-11-21, Palm Springs, Ca (USA).

Dieses Archiv kann nicht den Volltext zur Verfügung stellen.

Kurzfassung

Alkaline fuel cells (AFC) are an interesting alternative to polymer electrolyte fuel cells (PEFC). AFC have some advantages compared with PEFC: they do need neither expensive electrolyte nor expensive noble metal catalysts. As the main disadvantage it is generally believed that AFC are more sensitive to being damaged by overloading and the power density with air is lower than for PEFC at the present state of development. For practical use of AFCs the long term behavior of the components is decisive, in particular the behavior of the electrodes, because the electrolyte can be easily changed. At DLR the long term behavior of anodes with nickel catalysts was investigated by electrochemical measurements during operation as well as by physical characterization by x-ray photoelectron spectroscopy (XPS), porosimetry measurements by nitrogen adsorption, scanning electron microscopy (SEM) and energy dispersive x-ray analysis (EDX) before and after electrochemical operation. Long term test with up to few thousand hours operation times were performed .The electrochemical performance decreased during the long term tests, but the electrodes were still active after few thousand hours operation. The electrodes were electrochemically characterized mainly by recording V-i curves during the operation time. The decrease of the electrochemical performance yields not only to a down scaling of the V-i curve, but also the shape of the V-i curves is changed. Different degradation effects in the electrode can be detected by the physical characterization: the chemical composition of the electrode surface as well as the structure of the electrode and catalyst are changed by electrochemical stressing during fuel cell operation, e.g. the PTFE will be partially decomposed, the nickel catalysts will be disintegrated.

elib-URL des Eintrags:https://elib.dlr.de/45522/
Dokumentart:Konferenzbeitrag (Paper, Poster)
Titel:DEGRADATION OF NICKEL ANODES DURING OPERATION IN ALKALINE FUEL CELL
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Gülzow, ErichNICHT SPEZIFIZIERTNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Schulze, MathiasNICHT SPEZIFIZIERTNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:November 2002
Erschienen in:Fuel Cell Seminar 2002
Referierte Publikation:Nein
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:AFC, Degradation, PTFE, nickel, SEM, XPS
Veranstaltungstitel:Fuel Cell Sem inar 2002
Veranstaltungsort:Palm Springs, Ca (USA)
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:18 November 2002
Veranstaltungsende:21 November 2002
HGF - Forschungsbereich:Energie
HGF - Programm:Rationelle Energieumwandlung (alt)
HGF - Programmthema:E BZ - Brennstoffzellen (alt)
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E BZ - Brennstoffzellen
DLR - Teilgebiet (Projekt, Vorhaben):E - Membran-Brennstoffzellen (alt)
Standort: Stuttgart
Institute & Einrichtungen:Institut für Technische Thermodynamik > Elektrochemische Energietechnik
Hinterlegt von: Schulze, Dr.rer.nat. Mathias
Hinterlegt am:30 Nov 2006
Letzte Änderung:24 Apr 2024 19:07

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.