PROTONENLEITENDE MEMBRAN UND DEREN VERWENDUNG

摘要

Proton-conducting polymer membranes based on polyazoles are obtained by reacting aromatic tetra-amine and aromatic dicarboxylic acid, dissolving the prepolymer in polyphosphoric acid, heating the solution to form a polyazole polymer and then coating onto a support as usual. Proton-conducting polymer membranes based on polyazoles, obtained by (A) reacting aromatic tetra-amino compounds with aromatic dicarboxylic acids or their esters at up to 350 (preferably up to 300) [deg]C, (B) dissolving the resulting solid prepolymer in polyphosphoric acid, (C) heating the solution under inert gas at up to 300 (preferably 280) [deg]C to form a solution of polyazole polymer, (D) forming a membrane from the solution on a support and (E) treatment to form a self-supporting membrane. Independent claims are also included for (a) electrodes with a proton-conducting polyazole-based coating obtained by performing stages (A) to (C) as above and then (D) forming a layer on an electrode by coating with the polyazole solution and (E) treatment of the layer; (b) membrane-electrode units containing at least one electrode (especially as in (a)) and at least one membrane as described; and (c) fuel cells containing these membrane-electrode units.