| 摘要 |
Disclosed is an electrode with adjustable gas permeability for electrochemical cells, in particular fuel cells. The electrode is formed by first and second laminated thin layers the first of which mainly serves for determining the overall gas permeability through the thickness of the electrode and conducting electricity and the second one which is adjacent to a membrane of the cell does not only serve for conducting electricity but also for supplying the reaction gases and removing the reaction products. Therefore, it basically consists of a porous electricity-conducting material. The laminate of the layers of the electrode consists of at least two materials of different gas permeability which substantially are located surface to surface, wherein the material with the higher gas permeability is located on the side of the membrane and forms the first layer, and the material with the lower gas permeability forms the second layer to be located on the side away from the membrane. From this side, openings are formed in or through the laminate towards the side adjacent to the membrane, and the sidewalls of the openings in the area of the material with the higher gas permeability are still at least partially covered by the material with the lower gas permeability which penetrates into this material layer.
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