| abstract |
There are provided a novel proton-conducting polymer membrane that shows good workability in a fuel cell assembling process and good proton conductivity and durability even under high-temperature, non-humidified conditions, a method for production thereof, and a fuel cell therewith. The proton-conducting polymer membrane includes: a polymer membrane containing a polybenzimidazole compound having a sulfonic acid group and/or a phosphonic acid group; and vinylphosphonic acid contained in the polymer membrane. The fuel cell uses the proton-conducting polymer membrane. The polybenzimidazole compound preferably includes a sulfonic and/or phosphonic acid group-containing component represented by Structural Formula (1): n n n n n n n n n n wherein n represents an integer of 1 to 4, R 1 represents a tetravalent aromatic linking unit capable of forming an imidazole ring, R 2 represents a bivalent aromatic linking unit, and Z represents a sulfonic acid group and/or a phosphonic acid group. |