POLYMER ELECTROLYTE MATERIAL, POLYMER ELECTROLYTE PART, MEMBRANE ELECTRODE ASSEMBLY, AND POLYMER ELECTROLYTE TYPE FUEL CELL

摘要

The present invention provides a polymer electrolyte material which has a fraction Rw of non-freezing water shown by the equation (S1) below of 75 to 100% by weight, and an ionic group, and the polymer electrolyte material is in a moisture state formed by immersing the polymer electrolyte material for 12 hours in 1 to 30% by weight methanol aqueous solution at 40 to 80°C and then for 24 hours in pure water at 20°C, wherein Rw = [Wnf / (Wfc+Wnf)] x 100 (S1).