Patent ID: 8673517
Filing Date: 2014-03-18
Classification: H01B,H01M,Y02E

Abstract:
1. A polymer electrolyte membrane for polymer electrolyte fuel cells, which comprises a fluorinated proton conductive polymer and a fluorinated reinforcing material, wherein the fluorinated proton conductive polymer satisfies the following conditions (i) and (ii): (i) the proton conductivity is at least 0.06 S/cm in an atmosphere at a temperature of 80° C. under a relative humidity of 50%, and (ii) it is a polymer having repeating units based on a monomer having a group (a) with an equivalent weight of at most 400 g per 1 mol of ionic groups and repeating units based on a perfluoromonomer (except for the above monomer), wherein said group (α) is represented by the following structural formula: wherein Q