Patent ID: 8361674
Filing Date: 2013-01-29
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
1. Multi-layer membrane-electrode-assembly for use in electrochemical cells comprising: a first electrically conductive bipolar plate; a second electrically conductive bipolar plate; and a membrane-electrode-assembly positioned between the first and the second bipolar plates, comprising an ionomer membrane with a front side and a back side, two electrode layers, two protective film layers and two gas diffusion layers, wherein one electrode layer, one protection film layer and one gas diffusion layer are proximate to the front side and the other electrode layer, protection film layer and gas diffusion layer are proximate to the back side of the ionomer membrane, and wherein the first bipolar plate, the second bipolar plate and the membrane electrode-assembly are bonded together by means of an adhesive material, the adhesive material being in direct contact with the protective film layers and the bipolar plates and not in direct contact with the ionomer membrane and wherein a frame of each protective film layer is attached to either side of the ionomer membrane in such a way that each protective film layer overlaps a region of each electrode layer and is in direct contact with the membrane and one of the gas diffusion layers and together the protective film layers act as barrier layers to prevent contamination of the ionomer membrane and the electrode layers by components of the adhesive material.