Method for conditioning membrane-electrode-units for fuel cells
AssigneeBASF Fuel Cell GmbH
InventorsOemer Uensal, Joachim Kiefer, Isabel Kundler, Mathias Weber, Christoph Padberg, Thomas Schmidt, Jochen Baurmeister, Gordon Calundann, Glen Hoppes
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Abstract
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.
Claims23
1-19. (canceled)
A method for conditioning a membrane electrode assembly wherein the membrane electrode assembly comprises
- A) at least one polymer electrolyte matrix in the form of a membrane containing at least one oxo acid of phosphorus and/or sulphur and at least one polymer with at least one heteroatom selected from the group of nitrogen, oxygen and/or sulphur;
- and
- B) at least two electrodes;
- which comprises laminating the polymer matrix and the electrodes to form a membrane electrode assembly and conditioning after the lamination in a temperature range of 60° C. to 300° C.
The method of claim 38, wherein said further polymer is at least one of the following polymers selected from the group consisting of polysulphone, polyethersulphone, polyaryl ketone, polyether ketone, polyether ketone ketone, polyether ether ketone, polyether ether ketone ketone and an aromatic polymer carrying sulphonic acid groups.
A membrane electrode assembly comprising
- A) at least one polymer electrolyte matrix in the form of a membrane containing at least one oxo acid of phosphorus and/or sulphur and at least one polymer with at least one heteroatom selected from the group of nitrogen, oxygen and/or sulphur;
- and
- B) at least two electrodes;
- wherein the water content of the polymer electrolyte matrix is 20% by weight or less.
Dependencies are inferred from the claim text.