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Abstract

The high temperature fuel cell with a thin film electrolyte has an electrochemically active element which is executed as a planar multi-layer structure. At least the electrolyte and cathode layers are deposited on a porous, gas-permeable carrier structure, by means of a thin film technique. The carrier structure is a sintered body of metal ceramic material which comprises a highly porous base layer as well as a fine pored cover layer of anode material placed on the base layer. The pores of the base layer are open with respect to one another and have an average diameter of the order of magnitude of at least about 300 .mu.m. The pores of the cover layer have diameters which are not substantially greater than 1 to 3 .mu.m. The coefficient of thermal expansion of the carrier structure is substantially the same as that of the solid electrolyte.

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First Claim