MEMBRANE ELECTRODE UNITS AND FUEL CELLS WITH AN INCREASED SERVICE LIFE

A membrane-electrode unit includes two diffusion layers, each layer being in contact with a catalyst layer and the layers separated by a polymer electrolyte membrane. A polymer frame contacts at least one of the two surfaces of the membrane. The frame includes an inner region on at least one surface...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	SCHMIDT, THOMAS, OTT, DETLEF, RAT, FRANCIS, PADBERG, CHRISTOPH, HOPPES, GLEN, JANTOS, MARC
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G BASIC ELECTRIC ELEMENTS CHEMISTRY COMPOSITIONS BASED THEREON ELECTRICITY GENERAL PROCESSES OF COMPOUNDING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	A membrane-electrode unit includes two diffusion layers, each layer being in contact with a catalyst layer and the layers separated by a polymer electrolyte membrane. A polymer frame contacts at least one of the two surfaces of the membrane. The frame includes an inner region on at least one surface of the membrane and an outer region outside the diffusion layer. The thickness of the outer region is between 50 and 100% of the thickness of the inner region. The thickness of the outer region is reduced by a maximum 2% at a temperature of 80° C. and a pressure of 10 N/mm over a period of 5 hours, the reduction being determined after a first compression process, carried out at a pressure of 10 N/mm for 1 minute.