Proton conducting polymer membrane, useful for the production of fuel cells, is prepared by mixing an aromatic tetra-amino compound with an aromatic carboxylic acid in vinyl containing phosphoric acid

摘要

A proton conducting polymer membrane comprising phosphoric acid group containing polymers is prepared by mixing an aromatic tetra-amino compound with an aromatic carboxylic acid in vinyl containing phosphoric acid to form a solution or dispersion and heating under an inert gas to form a polyazole polymer, applying a layer of the mixture onto a support and polymerization of the vinyl containing phosphoric acid. A proton conducting polymer membrane (I) comprising phosphoric acid group containing polymers is prepared by: (a) mixing at least one aromatic tetra-amino compound with at least one aromatic carboxylic acid or its ester that has at least 2 acid groups per carboxylic acid monomer or mixing at least one (hetero)aromatic diaminocarboxylic acid, in vinyl containing phosphoric acid to form a solution or dispersion; (b) heating the resulting solution or dispersion under an inert gas up to 350 degreesC to form a polyazole polymer; (c) applying a layer of the mixture from step (A) or (B) onto a support and; (d) polymerization of the vinyl containing phosphoric acid in the flat sheet from step (C). Independent claims are included for: (1) an electrode having a proton conducting polymer coating of the membrane (I) prepared by application of the mixture (A) onto an electrode, heating to 350(280) degreesC under inert gas to form a polyazole polymer and polymerization of the vinyl containing phosphoric acid; (2) a membrane-electrode unit (II) containing at least one electrode and a membrane (I) and; (3) a fuel cell containing at least one membrane-electrode unit (II).