MEMBRANE ELECTRODE ASSEMBLIES FOR POLYMER ELECTROLYTE HYDROGEN AND DIRECT METHANOL FUEL CELLS AND METHODS FOR THEIR PRODUCTION

摘要

Membrane Electrode Assemblies for Polymer Electrolyte Hydrogen and Direct Methanol Fuel Cells and Methods for Their Production Electrodes and membrane electrode assemblies for use in fuel cells are provided containing a plurality of layers of catalyst and binder, wherein the first layer of the plurality of layers contains a higher concentration of catalyst as compared to each subsequent layer of the electrode.