PROTON-CONDUCTING POLYMER MEMBRANE CONTAINING POLYAZOLE BLENDS, AND APPLICATION THEREOF IN FUEL CELLS

摘要

The invention relates to a proton-conducting polymer membrane which contains polyazoles and is obtained by a method comprising the steps of A) producing a mixture comprising 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, at least one additional polymer (polymer B) that represents no polyazole being added to the composition obtained in step A) and/or step B), the weight ratio of the polyazole to polymer B ranging between 0.1 and 50.