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Abstract

The invention relates to a method of producing solid oxide fuel cells (SOFC) having a cathode-electrolyte-anode unit supported by a metal substrate. It is the object of the invention in this respect to provide solid oxide fuel cells which achieve an increased strength, improved temperature change resistance, a secure bonding of films forming the cathode-electrolyte-anode unit and can be produced free of distortion and reproducibly. In the method in accordance with the invention, a film forming the anode is first wet chemically applied to a surface of a porous metallic substrate as a carrier of the cathode-electrolyte-anode unit. An element which has already been sintered gas tight in advance and which forms the electrolyte is then placed on or applied a really to this film forming the anode and at a first thermal treatment up to a maximum temperature of 1250° C. the organic components contained in the film forming the anode are expelled, this film is sintered and in so doing a connection with material continuity is established between the substrate and the electrolyte. Subsequent to this, a further film forming the cathode is wet chemically applied to the electrolyte and is sintered in a further thermal treatment at temperatures beneath 1000° C. and the cathode is connected with material continuity to the electrolyte.

First Claim