Membrane-electrode assembly for polymeric membrane fuel cells

摘要

The invention is relative to a membrane-electrode assembly for fuel cells, comprising a state of the art ion-exchange polymeric membrane and by state of the art gas diffusion electrodes, whose electrochemical properties are modified through the addition of a hydrophilic component localised in correspondence of one or both the electrodic interfaces and/or one or both the external surfaces of the membrane. The such modified membrane-electrode assembly is characterised by high protonic conductivity and high efficiency even in the presence of small quantities of carbon monoxide, or of other contaminants contained in the fuel, even at temperatures as low as 100 DEG C, being also suitable for medium temperature (100-160 DEG C) operation at relative humidity level lower than saturation.