Basf Fuel Cell Gmbh

Celanese Ventures Gmbh

Basf Fuel Cell Research Gmbh

Christoph Padberg

Oemer Uensal

Jochen Baurmeister

Joachim Kiefer

Gordon Calundann

Jürgen Pawlik

Isabel Kundler

Mathias Weber

Glen Hoppes

Thomas Schmidt

Jürgen Sinschek

Torsten Raap

Ulf Hofmann

Brian C Benicewicz

Georg Frank

Thomas Soczka-Guth

Detlef Ott

The present invention relates to membrane electrode assemblies comprising two electrochemically active electrodes separated by a polymer electrolyte membrane, there being a polyimide layer on each of the two surfaces of the polymer electrolyte membrane that are in contact with the electrodes. The present membrane electrode assemblies may be used in particular for producing fuel cells which have a particularly high long-term stability.

Long-life membrane electrode assemblies and its use in fuel cells

The present invention relates to a method for the conditioning of membrane electrode assemblies for fuel cells in which the output of the membrane electrode assemblies used can be increased and therefore the efficiency of the resulting polymer electrolyte membrane fuel cells can be improved.

Method for conditioning membrane-electrode-units for fuel cells

A method for production of a membrane/electrode unit for a fuel cell is disclosed. The conducting polymer membrane is compressed with two electrodes until a given compression is achieved. The method permits an increase in resting voltage of the membrane/electrode unit in use, the amount of damage during production is reduced, and a constant thickness within a production run is achieved.

Method for the production of membrane/electrode units

The invention relates to a method for production of a membrane/electrode unit, whereby a conducting polymer membrane is compressed with two electrodes until a given compression is achieved. Said method permits an increase in resting voltage of the membrane/electrode unit in use, the amount of damage during production is reduced and a constant thickness within a production run is achieved.

The invention relates to a membrane-electrode unit comprising a) two electrochemically active electrodes divided by a polymer electrolytic membrane, wherein the surfaces of said polymer electrolytic membrane are in contact with the electrodes in such a way that the first electrode partially or entirely covers the front side of the polymer electrolytic membrane and the second electrode partially or entirely covers the rear side thereof, b) a sealing material is applied to the front and rear sides of the polymer electrolytic membrane, wherein the polymer electrolytic membrane is provided with one or several recesses and the sealing material applied to the front side of the polymer electrolytic membrane is in contact with the sealing material applied to the rear side thereof. A method for producing said membrane-electrode unit and fuel cells provided therewith are also disclosed.

Membrane-electrode unit and fuel elements with increased service life

The present invention relates to a proton-conducting polymer membrane which comprises polyazoles and is coated with a catalyst layer and is obtainable by a process comprising the steps

Proton-conducting polymer membrane that contains polyazoles and is coated with a catalyst layer, and application therof in fuel cells

Membranes comprising sulfonated polyether ketone and another polymer, process for their production, and their use, Membranes comprising from 30 to 99.5% by weight of a sulfonated, strictly alternating polyether ketone (A) having repeat units of the formula (I) &#x2014;Ar&#x2014;O&#x2014;Ar'&#x2014;CO&#x2014;, where Ar and Ar&#x2032;, independently of one another, are bivalent aromatic radicals, with an ion exchange capacity of from 1.3 to 4.0 meq of &#x2014;SOH/g of polymer and from 0.5 to 70% by weight of a partially fluorinated, nonfluorinated or perfluorinated polymer (B) are described. The membranes may be used in fuel cells.

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Wiesbaden, Germany

Christoph Padberg