PERMSELECTIVE SEPARATED MICROPOROUS LAYERED SILICATE PARTICLES DEPOSITED POLYMER ELECTROLYTE MEMBRANE FOR DIRECT METHANOL FUEL CELL AND METHOD OF PREPARING THE SAME AND MEMBRANE ELECTRODE ASSEMBLY AND DIRECT METHANOL FUEL CELL USING THE SAME

摘要

PURPOSE: A polymer electrolyte film for a direct methanol fuel cell is provided to efficiently suppress a crossover of a methanol and to selectively transmit water. CONSTITUTION: A polymer electrolyte film for a direct methanol fuel cell, which is to be inserted between the anode and the cathode, includes an ion conductive polymer electrolyte film. A plurality of microporous lamellar silicate particles the pore size of which is larger than that of a water molecule and smaller than that of a methanol molecule is laminated on the surface of the ion conductive polymer electrolyte film. The pore size of the microporous lamellar silicate particle is 1-20 . The thickness of the laminated microporous lamellar silicate particle is 50 nm to 4 mm.