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US 2009/0214921 A1Published application
Proton-conducting membrane and use thereof
AssigneePEMEAS GmbH
InventorsOemer Uensal, Kilian Brehl, Edmund Thiemer
Life of this patent
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Abstract
The present invention relates to a novel proton-conducting polymer membrane based on polyazoles which can, owing to its excellent chemical and thermal properties, be used for a variety of purposes and is particularly suitable as a polymer-electrolyte membrane (PEM) for the production of membrane electrode units for so-called PEM fuel cells.
Claims24
1-21. (canceled)
A proton-conducting polymer membrane based on polyazoles which can be obtained by a process comprising the steps of
- A) dissolving the polyazol-polymer in organic phosphonic anhydrides with formation of a solution and/or dispersion,
- B) heating the solution obtainable in accordance with step A) under inert gas to temperatures of up to 400° C.,
- C) forming a membrane using the solution of the polyazole polymer in accordance with step B) on a support and
- D) treatment of the membrane formed in step C) until it is self supporting.
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An electrode having a proton-conducting polymer coating based on polyazoles which can be obtained by a process comprising the steps of
- A) dissolving the polyazol-polymer in organic phosphonic anhydrides with formation of a solution and/or dispersion,
- B) heating the solution obtainable in accordance with step A) under inert gas to temperatures of up to 400° C.,
- C) forming a membrane using the solution of the polyazole polymer in accordance with step B) on an electrode and
- D) treatment of the layer formed in step C).
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Dependencies are inferred from the claim text.