| abstract |
MEA 7-layer assemblies with gasket, comprising:n a film of ionomeric membrane ( 3 ), containing functional acid groups —SO 3 H and/or —COOH, having in at least one direction, called direction x, a size variation lower than 0.08%; two GDL sheets ( 1 ) and ( 2 ) in porous material having on one surface an electrocatalytic layer, not shown in the Figures, of which:n the first sheet DGL ( 1 ) is coextensive with the membrane ( 3 ) surface, positioned so as to overlap thereto; the second sheet GDL ( 2 ), having a lower width but the same length of the film of membrane ( 3 ), measured in the x direction; the two sheets ( 1 ) and ( 2 ) placed so that the electrocatalytic layer comes into contact, respectively, with each of the two membrane faces; n a gasket positioned according to a frame shape along the assembly perimeter. |