Kathode-Elektrolyt-Anode-Einheit fuer Festoxid-Brennstoffzellen und Verfahren zu deren Herstellung

EP 1806805 A2 UPAB: 20070801 NOVELTY - Unit has a layer composition with a porous anode (3) formed in the form of a layer, gas-tight electrolyte (4) and a porous cathode (7), where the composition is formed on a porous metallic, plate-shaped and planar substrate (1). The layer forming the anode is separated from the metallic substrate by a ceramic intermediate layer (2), where the layer (2) has a barrier effect for chromium and iron and is electronically conductive when an oxygen partial pressure is within a preset value. Another layer made of ceramic and electronically conducting material is formed on a side of the substrate. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method of manufacturing a cathode-electrolyte-anode unit. USE - Used for a solid-oxide fuel cell (claimed). ADVANTAGE - Layer forming the anode is separated from the metallic substrate by the ceramic intermediate layer, where the intermediate layer has the barrier effect for chromium and iron, and is electronically conductive when the oxygen partial pressure is within the preset value, thus preventing degradation of anode by inter diffusion between the anode and the metallic substrate during the operation of the unit in a high temperature fuel cell. The unit is fault-free and is stable in the operating temperature