Membrane for fuel cells containing polymers, the phosphonic acid and / or sulfonic acid groups, the membrane-electrode assembly and its use in fuel cell

The present invention relates to a membrane for fuel cells containing polymers phosphonic acid and / or sulfonic acid groups include, characterized in that the phosphonic and / or sulphonic acid polymer include by copolymerization of monomers, the phosphonic acid and / or sulfonic acid groups, and hydrophobic is available monomers.