Patent ID: 7981566
Filing Date: 2011-07-19
Classification: H01M,Y02E,Y02P

Abstract:
1. A membrane electrode assembly for a polymer electrolyte fuel cell, comprising: a pair of electrodes comprising a catalyst; and a polymer electrolyte membrane disposed between the electrodes, the polymer electrolyte membrane comprising: a polymer segment A having an ion conductive component; and a polymer segment B not having an ion conductive component, wherein the polymer segment A is a repeated constitutional unit shown in Chemical Formula 1 and the polymer segment B is a repeated constitutional unit shown in Chemical Formula 2; wherein A is a bivalent electron attracting group, B is a bivalent electron donating group or a covalent bonding, Ar is an aromatic group having a substituent shown as —SO 3 H, m is an integer from 0 to 10, n is an integer from 0 to 10, and k is an integer from 1 to 4; wherein groups from R wherein a water absorption efficiency (an amount of water absorbed in the polymer electrolyte membrane that has been immersed in water at 90° C. for 30 minutes) is in a range from 0.02 to 1.13 g per 1 g of the polymer electrolyte membrane at a thawing temperature of from −30 to 0° C., and wherein 1-methoxy-2-propanol and γ-butyrolactone are used as a solvent during production of the polymer electrolyte membrane.