ELECTROLYTE MEMBRANE FOR FUEL CELL USING FLUORINE COPOLYMER AS PRECURSOR, METHOD FOR PRODUCING ELECTROLYTE MEMBRANE FOR FUEL CELL USING THE FLUORINE COPOLYMER PRECURSOR, AND ELECTROLYTE MEMBRANE USING THE FLUORINE COPOLYMER PRECURSOR Fuel cell having

摘要

PPROBLEM TO BE SOLVED: To stabilize a structure of a tetrafluoroethylene-perfluorovinyl ether copolymer having a -SOSB2/SBF group without great changes in a copolymerization ratio and a molecular weight. PSOLUTION: This manufacturing method of an electrolyte membrane for a fuel cell with a fluorine-based copolymer as a precursor, and the obtained electrolyte membrane for the fuel cell are characterized by that the tetrafluoroethylene-perfluorovinyl ether copolymer having the -SOSB2/SBF group is treated in a fluorine gas atmosphere at 200-250 C. PCOPYRIGHT: (C)2008,JPO&INPIT