Nkk Corporation

Hiroshi Tsuneizumi

Hirotaka Nakagawa

Yoshio Sato

Hiroshi Mihara

Eiji Morishige

Shigeyoshi Kosuge

A fuel cell comprises at least two cell members, each of which has a flat-plate solid electrolyte having a fuel electrode layer on one surface thereof and an air electrode layer on the other surface thereof, separators, each of which is arranged between the cell members and comprises frame materials and metallic sheets having concave and convex portions and being coupled to the frame materials, a fuel supply path for supplying fuel and an air supply path for supplying air, a fuel discharge path for disharging fuel and an air exhaust path for exhausting air and collector members mounted on the outer sides of the separators of the highest and lowest stages. Further, another fuel cell comprises at least two cell members, each of which has a flat-plate solid electrolyte layer on one surface thereof and an air electrode layer on the other surface thereof, metallic separators, each of which is arranged between the cell members and comprises a wave-form member, an upper flat-plate member and a lower flat-plate member, the wave-form member being put between the upper flat-plate member and the lower flat-plate member, a hole made in the upper flat-plate member for supplying fuel to the fuel electrode layer and a hole made in the lower flat-plate member for supplying air to the air cell member layer and a fuel supply path for supplying fuel and an air supply path for supplying air.

Fuel cell

A fuel cell comprises a stack of cell members, each cell member including a flat-plate separator, an air electrode, a solid electrolyte and a fuel electrode, spacers arranged along peripheries of the separators among the separators of the stack of cell members, air supply paths for supplying air to the air electrodes, air being sent to the air electrodes through grooves of the flat-plate separators and air supply paths, air exhaust paths for exhausting excessive air, fuel supply paths for sending fuel to the fuel electrodes and fuel discharge paths for discharging excessive fuel. The fuel cell has an oxidation-resistant coating layer on the surface of the separator on the side of the air electrode. The solid electrolyte is made by the use of one selected from the group of Laser Physical Vapor Deposition Method, Plasma Thermal Spraying Method, Electron Beam Vapor Deposition Method and Sputtering Method. The air electrode comprises a mixed powder of lanthanum manganese oxide doped with strontium oxide and yttria-stabilized zirconia.

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Tokyo, Japan

Hiroshi Tsuneizumi