Abstract: A solid electrolyte fuel cell having a multi-layer structure of flat unit cells composed of a solid electrolyte, a first electrode and a second electrode with metal bipolar plates as gas barriers and collectors preferably made of foam metal or a foam alloy interposed between the adjacent unit cells. A fuel gas and an oxidizing gas are supplied to the fuel cell so that they flow in the directions crossing each other with the solid electrolyte interposed therebetween. The metal bipolar plate is preferably provided with grooves so that the fuel gas and the oxidizing gas can be uniformly distributed over the plate.

Abstract: This invention provides a solid electrolyte fuel cell operable with high efficiency even in the temperature range of about 850.degree. to 650.degree. C., The invention is characterized by the use of a novel perovskite double oxide of the composition A.sub.X B.sub.Y O.sub.3-.alpha.. The fabrication of the electrolyte, air electrode and fuel electrode layers by tape casting has contributed to marked improvement in processability and productivity.

Abstract: An anode for high temperature fuel cell containing metal hydrides or hydrogen absorbing alloys at least in part of the anode material of high temperature fuel cell operating while consuming a gas containing hydrogen, or a gas substantially containing hydrogen, as the fuel. In particular, at least in part of the anode for molten carbonate fuel cell, either metal hydrides or hydrogen absorbing alloys is used, and the performance of the anode is enhanced, and it contributes to extension of the life of the anode.