ELECTROLYTE MEMBRANE-ELECTRODE ASSEMBLY

• Main Authors: KUWATA SHIGEMASA, OKUYAMA YOZO, KODAMA KAZUNORI
• Format: Patent
• Language: English
• Published: 19.09.2013
• Subjects: BASIC ELECTRIC ELEMENTS; 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

PROBLEM TO BE SOLVED: To provide a gas diffusion layer capable of achieving both dry-out resistance and flooding resistance.SOLUTION: An electrolyte membrane-electrode assembly includes: a polymer electrolyte membrane; a cathode gas diffusion layer including a cathode catalyst layer, a cathode microporous layer and a cathode gas diffusion layer base material, which are disposed in order on one side of the polymer electrolyte membrane; an anode gas diffusion layer including an anode catalyst layer, an anode microporous layer and an anode gas diffusion layer base material, which are disposed in order on the other side of the polymer electrolyte membrane. A relative gas diffusion coefficient of the anode microporous layer is smaller than that of the cathode microporous layer by 0.05 [-] or more.