COMPOSITE ELECTROLYTE MEMBRANE HAVING ASYMMETRIC DENSITY GRADIENT FOR FUEL CELL, METHOD FOR MANUFACTURING SAME, MEMBRANE-ELECTRODE ASSEMBLY COMPRISING COMPOSITE ELECTROLYTE MEMBRANE HAVING ASYMMETRIC DENSITY GRADIENT FOR FUEL CELL, AND FUEL CELL COMPRISING SAME

摘要

The present invention relates to a composite electrolyte membrane for a fuel cell, a method for manufacturing same, a membrane-electrode assembly comprising a composite electrolyte membrane, and a fuel cell. In particular, the present invention relates to the composite electrolyte membrane for a fuel cell, the membrane-electrode assembly comprising same, and the fuel cell employing same has excellent performance, wherein the composite electrolyte membrane according to the present invention according to the present invention, is an electrolyte membrane having a different density gradient in the upper portion and the lower portion, and of which the rate of hydrogen gas penetration and impregnation of ionomers can be controlled.