MANUFACTURING METHOD FOR FLUORINE-BASED NONWOVEN FABRIC, FLUORINE-BASED NONWOVEN FABRIC, SOLID POLYMER ELECTROLYTE MEMBRANE FOR SOLID POLYMER FUEL CELL, AND MEMBRANE ELECTRODE ASSEMBLY

摘要

PROBLEM 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 polymer containing fluorine 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.

SOLUTION: The present manufacturing method for fluorine-based unwoven fabric uses fluorine polymer containing fluoroolefin as the fluorine-contained polymer in methods manufacturing the fluorine-based nonwoven fabric by the electric field spinning method using undiluted spinning liquid containing the fluorine containing polymer and the solvent. The fluorine unwoven fabric has fiber density of 7.5 cm3/m2or less and thickness of 23 μm or less. The polymer electrolyte membrane 25 contains the fluorine-based unwoven fabric. In addition, the polymer membrane 25 is installed between an anode 23 and a cathode 24 in the membrane electrode assembly 20.

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