| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electrolyte membrane for a fuel cell remarkably suppressing dimensional change compared with a conventional solid polymer electrolyte membrane and having ionic conductivity equal to conventional one. <P>SOLUTION: The electrolyte membrane for the fuel cell includes: a fluorine polymer electrolyte having a sulfonic acid group; and a copolymer which includes at least an aromatic ring and a cyclic imide that is condensed or not condensed with the aromatic ring, and in which an aromatic repeating unit having a structure in which the aromatic ring and the cyclic imide are bonded together directly or by only a single atom, is linked with a siloxane repeating unit having a structure that includes a siloxane structure. <P>COPYRIGHT: (C)2010,JPO&INPIT |
