| abstract |
An improved polymer electrolyte membrane fuel cell with longer life and better performance is provided. A functionalized polyazole having a repeating imidazole unit of the general formula (1a) and / or (1b) and / or (1c) and / or (2) is used for the polymer electrolyte membrane. Where the groups Ar, Ar 1 and Ar 2 are tetravalent, divalent or trivalent aromatic or heterocyclic aromatic groups, Y is a chemical bond or a group having 1-20 carbon atoms, v Is an integer of 1 to 10, and Z represents a group of general formula (3) or (4), wherein R 1 and R 2 are each independently a carbon atom or 1 to 20 carbon atoms. It is group which has. [Selection figure] None |