Fluorine-based nonwoven fabric manufacturing method, fluorine-based nonwoven fabric, solid polymer electrolyte membrane for polymer electrolyte fuel cell, and membrane electrode assembly

摘要

PPROBLEM TO BE SOLVED: To provide a manufacturing method for a fluorine-based nonwoven fabric, capable of manufacturing fluorine-based nonwoven fabric by an electric field spinning method using undiluted spinning liquid containing polymer containing fluorine with aliphatic ring structure in a principal chain and solvent without using water soluble resin or electrolyte, to provide a solid polymer electrolyte membrane for the solid polymer fuel cell using the fluorine-based nonwoven fabric, and to provide the membrane electrode assembly for the solid polymer fuel cell. PSOLUTION: The solvent with a boiling point of 110C or more is used as the solvent in the manufacturing method for the fluorine-based unwoven fabric manufacturing by the electric field spinning method using the undiluted spinning liquid containing the fluorine containing solid polymer with the aliphatic ring structure in the principal chain and the solvent. The fluorine-based unwoven fabric has fiber density of 7.5 cmSP3/SP/mSP2/SPor less and thickness of 23 m or less. The solid polymer electrolyte membrane 25 contains the fluorine-based unwoven fabric. In addition, the polymer electrolyte membrane 25 is installed between an anode 23 and a cathode 24 in the membrane electrode assembly 20. PCOPYRIGHT: (C)2009,JPO&INPIT