MEMBRANE ELECTRODE ASSEMBLY AND POLYMER ELECTROLYTE MEMBRANE FUEL CELL USING THE SAME

摘要

The invention provides a membrane electrode assembly capable of decreasing the reaction resistance thereof at 20°C and attaining a high power, and a polymer electrolyte membrane fuel cell using this. The membrane electrode assembly of the invention comprises an anode catalyst layer and a cathode catalyst layer each made of an electrode substrate, and a polymer electrolyte membrane sandwiched between the anode and the cathode, and satisfying the following expression: -2 <= log Rr < 1 wherein the reaction resistance at 20°C is represented by Rr (.OMEGA..cndot.cm2).