A fuel cell stack is described. The fuel cell stack comprises an interconnect assembly comprising a cathode-side interface coupled to an interconnect via a first joint, and an anode-side interface coupled to the interconnect via a second joint, the interconnect assembly having a first coefficient of thermal expansion (CTE) at an interface side of the interconnect assembly. The fuel cell stack further comprises a fuel cell element coupled to the interconnect assembly at the interface side via a hermetic seal, the fuel cell element having a second CTE at the interface side, the first CTE and the second CTE satisfying a predetermined CTE matching condition.

A fuel battery and a fuel cell stack, the fuel battery including: a fuel cell that generates electric power through a power generating reaction of reactant gases and includes a solid electrolyte layer having a first main surface and a second main surface, a first electrode disposed on the first main surface and serving as one of a cathode and an anode, and a second electrode disposed on the second main surface and serving as the other one of the cathode and the anode; an interconnector disposed so as to face the first electrode; and a current collecting member that electrically connects the first electrode to the interconnector. The first electrode includes: an inner portion connected to the current collecting member; and an outer portion disposed outward of the current collecting member and having a height larger than the height of the inner portion.

A method of preparation and application for a glass ceramic sealing thin strip with high sealing performance, differing from using conventional glass ceramic packaging paste applied to the junction of the cell stack assembly and connecting plates. The glass ceramic sealing thin strip of present invention utilizes tape casting to produce a single layer or multi-layer stacking in accordance with the required thickness of the glass-ceramic sealing thin strip, and cutting the glass ceramic sealing thin strips from molds in accordance with the geometry of cell stacks with equal thickness of the glass ceramic sealing thin strip for SOFC cell stack assembly, aiming to overcome the setbacks of the conventional dispensing method with glass ceramic packaging paste that makes the thickness difficult to control, and to effectively improve sealing performance of the cell stack assembly and the power generation efficiency, and achieve commercial application with mass production.

A method of preparation and application for a glass ceramic sealing thin strip with high sealing performance, differing from using conventional glass ceramic packaging paste applied to the junction of the cell stack assembly and connecting plates. The glass ceramic sealing thin strip of present invention utilizes tape casting to produce a single layer or multi-layer stacking in accordance with the required thickness of the glass-ceramic sealing thin strip, and cutting the glass ceramic sealing thin strips from molds in accordance with the geometry of cell stacks with equal thickness of the glass ceramic sealing thin strip for SOFC cell stack assembly, aiming to overcome the setbacks of the conventional dispensing method with glass ceramic packaging paste that makes the thickness difficult to control, and to effectively improve sealing performance of the cell stack assembly and the power generation efficiency, and achieve commercial application with mass production.

A fuel cell stack including: a metal-supported cell including a power generation cell formed of paired electrodes and an electrolyte sandwiched from both sides between the paired electrodes, and a metal supporting portion which is made of metal and which supports the power generation cell; a separator defining and forming a flow passage portion for gas flow between the separator and the power generation cell; a welded portion in which the metal-supported cell and the separator are welded to each other; a spring portion configured to apply absorption reaction force for absorbing displacement in a stacking direction in the welded portion to the metal-supported cell; and a stopper portion configured to restrict a displacement amount of the spring portion.

A fuel cell stack including: a metal-supported cell including a power generation cell formed of paired electrodes and an electrolyte sandwiched from both sides between the paired electrodes, and a metal supporting portion which is made of metal and which supports the power generation cell; a separator defining and forming a flow passage portion for gas flow between the separator and the power generation cell; a welded portion in which the metal-supported cell and the separator are welded to each other; a spring portion configured to apply absorption reaction force for absorbing displacement in a stacking direction in the welded portion to the metal-supported cell; and a stopper portion configured to restrict a displacement amount of the spring portion.

A solid oxide fuel cell including unit cells, including: a pair of interconnectors for electrically connecting the unit cells; a membrane-electrode assembly including an electrolyte membrane and a pair of electrode layers disposed with the electrolyte membrane therebetween; a pair of current collectors disposed between the electrode layers and the interconnectors so as to be in contact with the pair of electrode layers and the pair of interconnectors, respectively, and electrically connecting the pair of electrode layers and the pair of interconnectors; and elastic bodies biasing at least one current collector of the pair of current collectors toward a corresponding electrode layer and made of austenitic stainless steel.

A fuel cell stack in which cell units are stacked one on top of another, each of the cell units including: a power generation cell; and a separator defining and forming a flow passage portion, being a flow path of the gas, between the separator and the power generation cell, includes a frame body having an insulating property and arranged between at least one set of the cell units adjacent to each other. The frame body includes: as viewed in a stacking direction, outer peripheral beam portions provided to surround an outer peripheral side of a region in which the power generation cell is arranged; a connection beam portion connecting the outer peripheral beam portions to each other; and sealing beam portions formed along sealing portions at least partially sealing a manifold portion through which the gas is allowed to flow to the separator.

A spring compression assembly is configured to apply a load to a stack of electrochemical cells. The assembly includes a ceramic leaf spring, a tensioner configured to apply pressure to a first side of the spring and a bottom plate located on a second side of the spring opposite the first side of the spring. The bottom plate is configured to transfer a load from the spring to the stack of electrochemical cells.

A stack for an electrical energy accumulator is provided having at least one storage cell, which in turn has a storage electrode and an air electrode that is connected to an air supply device, the air supply device having an air distribution plate, wherein the stack also has a water vapor supply device which is in contact with the storage electrode and the air distribution plate has at least one element of the water vapor supply device.