MEMBRANE ELECTRODE ASSEMBLY WITH MULTILAYORED CATHOD ELECTRODE FOR USING IN FUEL CELL SYSTEM

摘要

A membrane electrode assembly with a multilayered cathode electrode is provided to maintain the ion conductivity at a solid polymer electrolyte membrane and to prevent the flooding phenomenon at a cathode electrode by suppressing the move of water molecule from a polymer electrolyte membrane to a cathode electrode. A membrane electrode assembly has a multilayered cathode electrode(20) for a fuel cell system. The cathode electrode comprises a support layer(28), carbon layer(24, 26), and catalyst layer(22). The carbon layer comprises the first carbon layer having relatively less porosity and the second carbon layer having relatively more porosity.