PROTON-CONDUCTING POLYMER MEMBRANE THAT CONTAINS POLYAZOLES AND IS COATED WITH A CATALYST LAYER, AND APPLICATION THEREOF IN FUEL CELLS

摘要

The invention relates to a proton-conducting polymer membrane that contains polyazoles, is coated with a catalyst layer, and is obtained by a method comprising the steps of A) producing a mixture containing polyphosphoric acid, at least one polyazole (polymer A), and/or at least one or several compounds that are suitable for forming polyazoles under the influence of heat according to step B), B) heating the mixture obtained in step A) to temperatures of up to 400 DEG C under inert gas, C) applying a layer to a support by using the mixture according to step A) and/or B), D) treating the membrane formed in step C) until said membrane is self-supporting, and E) applying at least one coating containing a catalyst to the membrane formed in step C) and/or step D).