| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a polymer electrolyte membrane with high membrane strength, which includes an ion conductive domain having long continuity and a non-ion conductive domain, and a membrane-electrode assembly and a fuel cell each using the polymer electrolyte membrane. <P>SOLUTION: The polymer electrolyte membrane 5 includes a block copolymer having an ion conductive block and a non-ion conductive block, and has a micro-phase separation structure constituted of an ion conductive domain 1 including the ion conductive block and a non-ion conductive domain 2 including the non-ion conductive block. The ion conductive domain forms a worm-like continuous phase, the non-ion conductive domain forms a matrix part, and the aspect ratio b/a of average diameter a to continuation length b of the ion conductive domain is 100 or more. <P>COPYRIGHT: (C)2009,JPO&INPIT |
