Proton-conducting polymer membrane
A polymer electrolyte membrane includes a membrane polymer made of monomer units that have aromatic polyarylenes groups with proton-conducting functional groups bound to the aromatic polyarylene groups. The polymer electrolyte membrane can be used as a proton-conducting polymer membrane between the electrodes in a fuel cell.
1. A polymer electrolyte membrane comprising a membrane polymer made of monomer units that have aromatic polyarylene groups with proton-conducting functional groups bound to the aromatic polyarylene groups;
the monomer units comprising a number n of radicals R, the monomer units having at least one of the following structures:
the radicals R having at least one of the following structures:
2. The polymer electrolyte membrane as claimed in claim 1 , wherein the proton-conducting functional groups are substantially uniformly distributed.
3. The polymer electrolyte membrane as claimed in claim 1 , wherein the proton-conducting functional groups include phosphonic acid groups, sulfonic acid groups, or both.
4. The polymer electrolyte membrane as claimed in claim 1 , wherein the polymer electrolyte membrane can be obtained according to the following scheme
5. In a fuel cell having a proton-conducting polymer membrane between two electrodes, the improvement comprising that the proton-conducting polymer membrane comprises the polymer electrolyte membrane of claim 1 .