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 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.

The invention relates to a fuel cell device comprising a fuel cell unit (10) which comprises at least two fuel cells (12, 14) and an interconnection unit (16) which is provided to serially interconnect the at least two fuel cells (12, 14). According to the invention, the at least one interconnection unit (16) comprises at least two layers (18, 20) which are made from different materials.

The invention relates to a fuel cell device comprising a fuel cell unit (10) which comprises at least two fuel cells (12, 14) and an interconnection unit (16) which is provided to serially interconnect the at least two fuel cells (12, 14). According to the invention, the at least one interconnection unit (16) comprises at least two layers (18, 20) which are made from different materials.

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 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.

This disclosure relates to module level redundancy for fuel cell systems. A monitoring component monitors a set of operational parameters for a fuel cell group. The fuel cell group includes a set of fuel cell units, each having a set of fuel cell stacks. The fuel cell stacks include a set of gas powered fuel cells that convert air and fuel into electricity using a chemical reaction. The monitoring component determines that the set of operational parameters do not satisfy a set of operational criteria, and, in response, a load balancing component adjusts the electrical output capacity of the set of fuel cell units included in the fuel cell group.

A fuel cell unit with a plurality of fuel cells defining a longitudinal axis and a main flow direction coaxial to the longitudinal axis. Fuel cell inlets and fuel cell outlets are arranged at opposite ends of the fuel cell unit and in line with the main flow direction. Also, a component comprising first fluid conduits arranged parallel to the main flow direction, the first fluid conduits comprising first fluid inlets and first fluid outlets arranged at opposite ends of the component and in line with the main flow direction. The component is arranged adjacent the fuel cell unit such that at least one of the first fluid inlets and the first fluid outlets of the component are arranged adjacent at least one of the fuel cell outlets and the fuel cell inlets such that a fluid flow may flow substantially parallel to the longitudinal axis of the apparatus in the first fluid conduits of the component and in the fuel cell unit and when passing from the component to the fuel cell unit or vice versa.

A solid oxide fuel cell includes a solid electrolyte layer, a fuel electrode layer that is disposed on one surface of the solid electrolyte layer, an oxygen electrode layer that is disposed on the other surface of the solid electrolyte layer, and an intermediate layer that is disposed between the solid electrolyte layer and the oxygen electrode layer and that includes ceria-based particles containing rare earth elements other than cerium and ceramic particles consisting of oxide of a metallic element different from that of the ceria-based particles. The ceramic particles having a smaller average particle diameter than that of the ceria-based particles exist in grain boundaries of the ceria-based particles of the intermediate layer.

A fuel cell includes: a solid oxide electrolyte layer that has oxygen ion conductivity; an electrode layer that is provided on the solid oxide electrolyte layer; a separator that is provided on the electrode layer and is made of a metal material; and a sealing member that is provided from a circumference region of the solid oxide electrolyte layer to a circumference region of the dense metal layer, wherein the electrode layer, the separator and the sealing member demarcate at least a part of a gas passage, wherein at least a part of the sealing member is a mixed layer of a ceramic and a metal.