Patent ID: 8227138

Claim:
An electrolyte membrane for a fuel cell comprising a polymer of a phosphorus containing monomer, wherein: the polymer is a polymerization product of the phosphorus containing monomer or a polymerization product of the phosphorus containing monomer and a crosslinkable compound, the phosphorus containing monomer is represented by Formula 1, A is a substituted or unsubstituted C 1 -C 20 heterocyclic group, a substituted or unsubstituted C 4 -C 20 cycloalkyl group, or a substituted or unsubstituted C 1 -C 20 alkyl group, and R 2 and R 3 are each, independently, hydrogen, a C 1 -C 20 alkyl group, a C 1 -C 20 alkoxy group, a C 6 -C 20 aryl group, a C 6 -C 20 aryloxy group, a C 1 -C 20 heteroaryl group, a C 1 -C 20 heteroaryloxy group, a C 4 -C 20 cycloalkyl group, a C 1 -C 20 heterocyclic group, a halogen, a cyano group, or a hydroxyl group.