Planar high-temperature fuel cell

#This application is the US National Stage of International Application No. PCT/EP2009/062366, filed Sep. 24, 2009, and claims the benefit thereof. The International Application claims the benefits of German application No. 102008049712.6 filed Sep. 30, 2008. All of the applications are incorporated by reference herein in their entirety.

#The invention relates to a planar high-temperature fuel cell. The invention also relates to the fuel cell system comprised of same and to a method for the production thereof.

#Solid electrolyte high-temperature fuel cells are essentially characterized by a solid ceramic electrolyte which is generally implemented as an oxide ceramic layer between two electrodes. A fuel cell of this kind (SOFC=Solid Oxide Fuel Cell) generally has an operating temperature of 600 to 1000° C. At this temperature, the electrochemical reaction is optimized. Low operating temperatures tend to reduce the costs of a fuel cell system.

#Further details and advantages of the invention will emerge from the following description of exemplary embodiments with reference to the accompanying drawings and associated claims.

#In highly schematic form,

#FIG. 1 shows a perspective view of a planar fuel cell,

#In the figures, identical parts are provided with the same reference characters in each case. Some of the figures are described jointly.

#FIG. 1 shows a perspective view of a planar fuel cell and FIG. 2 an associated section. Reference numeral 5 denotes the metal support made of a sintered material which has a predefined porosity, functional layers for the SOFC being deposited on the upper side of the support structure. The functional layers consist specifically of the cathode K, the solid electrolyte El and the anode A. The layer structure as a whole is denoted by 100.

#In the layer structure 100, the solid electrolyte El of known composition is disposed as a thin layer between cathode K and anode A. The layered electrodes on the one hand and the layered solid electrolyte on the other can be formed from sub-layers interspersed with adaptation layers, for which reference is made to the prior art.