MEMBRANE ELECTRODE ASSEMBLIES FOR DMFC HAVING CATALYST CONCENTRATION GRADIENT

• Main Authors: YDE-ANDERSEN, STEEN, ODGAARD, MADELEINE, LUND, PETER
• Format: Patent
• Language: English; French
• Published: 12.07.2007
• Subjects: BASIC ELECTRIC ELEMENTS; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

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 (2a, 2b) adjacent to the PEM (1) of the plurality of layers (3a, 3b, 4a, 4b, 5a, 5b) contains a higher concentration of catalyst as compared to each subsequent layer of the electrode. L'invention concerne des ensembles d'électrodes à membrane destinés à des piles à combustible à méthanol direct et à hydrogène d'électrolyte polymère et des procédés destinés à la production de ces électrodes et de ces ensembles d'électrodes à membrane utiles dans des piles à combustible contenant plusieurs couches de catalyseur et de liant. La première couche composée de plusieurs couches contient une concentration élevée en catalyseur par rapport à chaque couche d'électrode subséquente.