Abstract: To provide a solid oxide fuel cell with improved durability while obtaining sufficient electricity generating performance. The present invention is a method for manufacturing solid oxide fuel cells (16) in which electricity generating elements (16a) are connected by an interconnector (102), including: a support body forming step (S1); surface deposition steps (S4, S9) for forming in sequence a first and second functional layer on a porous support body; an outermost layer deposition step (S13) for forming an outermost functional layer (101) in which slurry in liquid droplet form is continuously jetted to form dots, and an outermost functional layer is formed by the agglomeration of dots to be thicker than a first functional layer (98); and a sintering step (S14) for sintering functional layers; wherein in the outermost functional layer, traces of agglomerated dots remain and ring-shaped cracks surrounding each dot trace are formed by the sintering process.

Abstract: To provide a method of manufacturing a solid oxide fuel cell, capable of obtaining a uniform film thickness. The present invention is a method of manufacturing fuel cells (16), including a support body-forming step (S1) for forming a porous support body (97), a film deposition step for laminating functional layers constituting electricity generating elements on a support body; and a sintering step (S14, S16) for sintering the support body on which functional layers are formed; whereby the film deposition step includes surface deposition steps (S5, S11), in which a masking layer is formed in parts not requiring film deposition, and electricity generating elements first functional layers are simultaneously formed, and a dot deposition step (S15), in which slurry dots are formed by placing a slurry into a liquid droplet state and jetting it, and a second functional layer is formed by the agglomeration of these dots.

Abstract: A solid oxide fuel cell stack includes a support, a plurality of power generation elements provided on a surface of the support, the plurality of power generation elements connected in series, each including at least a fuel electrode, a solid electrolyte, and an air electrode stacked in that order, and an interconnector that electrically connects an air electrode in one of adjacent power generation elements to a fuel electrode in the other power generation element. A solid electrolyte in adjacent one power generation element is provided between a fuel electrode in the adjacent one power generation element and the fuel electrode in the adjacent other power generation element, and an insulating member is provided at a position that is on the solid electrolyte in the adjacent one power generation element and between the air electrode in the adjacent one power generation element and the solid electrolyte therein.

Abstract: A solid oxide fuel cell stack includes a support, a plurality of power generation elements connected in series, each including a fuel electrode, a solid electrolyte, and an air electrode stacked in that order on the support, and an interconnector electrically connecting an air electrode in one of the two adjacent power generation elements to a fuel electrode in the other power generation element. A solid electrolyte for one of the power generation elements is provided on the downside of the interconnector provided on the downside of the air electrode in the one power generation element so that the solid electrolyte is joined to the interconnector, and a solid electrolyte for the other power generation element is provided on the upper side of the interconnector provided on the upper side of the fuel electrode for the other power generation element so that the solid electrolyte is joined to the interconnector.

Abstract: There is provided a solid oxide fuel cell stack including a ceramic interconnector that has good electrical conductivity and oxide ion insulating property, that is, power generation efficiency. The solid oxide fuel cell stack includes at least: a plurality of power generation elements, each of which including a fuel electrode, a solid electrolyte, and an air electrode stacked in that order; and an interconnector that electrically connects the air electrode in one of adjacent power generation elements in the plurality of power generation elements to the fuel electrode in the other power generation element, the plurality of power generation elements being connected in series, wherein the interconnector is formed of formula (1): SraLabTi1-c-dNbcFedO3-???formula (1) wherein a, b, c, and d are a positive real number that satisfies 0.1?a?0.8, 0.1?b?0.8, 0.05?c?0.2, and 0.2?d?0.5.

Abstract: There is provided a solid oxide fuel cell stack including an interconnector that has excellent electrical conductivity, gas sealing property, and adhesion to a solid electrolyte. The solid oxide fuel cell stack includes a plurality of power generation elements, each of which including at least a fuel electrode, a solid electrolyte, and an air electrode stacked in that order; and an interconnector that electrically connects the air electrode in one of adjacent power generation elements in the plurality of the power generation elements to the fuel electrode in the other power generation element, the plurality of power generation elements being connected in series to each other, wherein an intermediate layer having a porosity of not more than 1% and an electrical conductivity of not less than 0.05 S/cm is provided between the interconnector and the fuel electrode in the other power generation element.

Abstract: A solid oxide fuel cell scatters MgO over a grain boundary of an LSGM which is a solid electrolyte layer. Ni components that diffuse from a fuel electrode formed on the other side of an LDC from the LSGM are trapped by the scattered MgO particles and are suppressed from diffusing towards an air electrode in the electrolyte layer.

Abstract: An object of the present invention is to provide a fuel cell preventing formation of a diffusion layer containing Ca and other elements, and having an excellent power generation performance at low temperature by preventing breakdown of a crystal structure of an electrolyte by firing. Disclosed is a solid oxide fuel cell which includes an inner electrode, a solid electrolyte, and an outer electrode, each being sequentially laminated on the surface of a porous support. The porous support contains forsterite, and has a Mg/Si molar ratio of 1.90 to 2.2 both inclusive, and an A-to-B ratio (A/B) of 0.0% to 9.0% both inclusive, where A denotes a maximum peak height which appears at a diffraction angle 2?=26.5° to 27.0° and B denotes a maximum peak height which appears at 36.5° to 37.0° in a powder X-ray diffraction pattern obtained by using Cu-K? radiation.

Abstract: To provide SOFC and method for manufacturing same, capable of preventing breakage of fuel cell electrodes, and of securing an electrical connection between fuel cells and a current collector. SOFC 1 comprising a cell array composed of fuel cells 16, and current collector 82 connected to electrodes formed on fuel cells 16, wherein current collector 82 is a metal plate on which attaching holes 84 are formed; elastic pieces 84a are provided on each attaching hole 84; current collector 82 is attached to the cell array using elastic pieces 84a, by the insertion of fuel cell 16 into attaching holes 84; and elastic pieces 84a are affixed to fuel cells 16 by electrode protective layer 152 so that the positions of elastic pieces 84a are not displaced relative to the electrodes on fuel cells 16.

Abstract: To provide a method for manufacturing SOFC, capable of preventing breakage of fuel cell electrodes, and of securing an electrical connection between fuel cells and a current collector. Step for forming electrode protective layers 152 on electrodes formed on fuel cells 16, modularization step for forming a cell array, and attaching step for attaching a current collector 82 to the cell array, wherein current collector 82 is a metal plate on which attaching holes 84 are formed for the insertion of fuel cells 16, elastic pieces 84a are formed at each attaching hole 84, fuel cells 16 are inserted into attaching holes 84, and current collector 82 is attached to the cell array by the elastic force; and protective layer 152 is constituted to prevent damage to electrodes caused by contact with elastic pieces.

Abstract: The present invention is a solid oxide fuel cell 1 including a reforming section 94, disposed inside a fuel gas supply flow path 20 above a vaporizing section 86 to surround the upper portion of a fuel cell stack 14, for steam reforming raw fuel gas F introduced from a fuel gas introducing portion 90a using steam S produced in a vaporizing section; and a circulating flow path portion 156 disposed in a fuel gas supply flow path between the vaporizing section and the reforming section for circulating rising raw fuel gas introduced from a fuel gas introducing section into a fuel gas supply flow path and rising steam produced in the vaporizing section along the circumferential direction of the fuel gas supply flow path so as to form a flow supplying mixed raw fuel gas and steam uniformly over the entire circumference of the reforming section.

Abstract: Provided is a solid oxide fuel cell stack including: a porous insulating support having a gas permeability and provided with a gas flow path therein; and a plurality of power generating elements which are provided on the insulating support and each of which includes an inner electrode, an electrolyte.

Abstract: To provide a method for manufacturing a solid oxide fuel cell apparatus. The present invention is a method for manufacturing a fuel cell apparatus, including an adhesive application step for adhering ceramic adhesive to joining portions so as to constitute an airtight flow path for guiding fuel, and a drying and hardening step for drying and hardening ceramic adhesive, whereby the drying and hardening step has: a workable hardening step for drying the ceramic adhesive at a predetermined first temperature to a state whereby the next manufacturing step can be implemented, and a solvent elimination and hardening step further hardens ceramic adhesive hardened in each of the workable hardening steps by raising it to a second temperature higher than the first temperature and approximately equal to the temperature of the fuel cells during an electrical generation operation.

Abstract: Provided is a solid oxide fuel cell unit comprising an insulating support, and a power generation element comprising, at least, a fuel electrode, an electrolyte and an air electrode, which are sequentially laminated one another, the power generation element being provided on the insulating support, wherein an exposed insulating support portion, an exposed fuel electrode portion, and an exposed electrolyte portion are provided in an fuel electrode cell end portion.

Abstract: The present invention is a method for manufacturing a solid oxide fuel cell apparatus for generating electricity by supplying fuel and oxidant gas to fuel cells housed in a fuel cell module, comprising: an adhesive application step for applying ceramic adhesive to the joint portions of constituent members so that the flow path carrying fuel or oxidant gas inside the fuel cell module are formed in an airtight manner; a workable hardening step for hardening the applied ceramic adhesive to a state capable of implementing the next manufacturing process; and a solvent elimination and hardening step wherein, after multiple repetitions of the adhesive application step and the workable hardening step, ceramic adhesive hardened in the workable hardening steps is dried to a state capable of withstanding temperatures during electrical generation.

Abstract: To provide a solid oxide fuel cell system in which fuel cells within a fuel cell module are connected in an airtight manner using ceramic adhesive. the invention is a solid oxide fuel cell system for generating electricity by reacting fuel and oxidant gas, including: a fuel cell module containing multiple fuel cells, and a fuel gas dispersion chamber for distributing and supplying fuel to each of the fuel cells, whereby each of the fuel cells is affixed in an airtight manner using ceramic adhesive to an affixing member forming the fuel gas dispersion chamber, and a gas leak suppression portion for suppressing the occurrence of cracks caused by shrinkage when a ceramic adhesive hardens is formed by the ceramic adhesive layer around the fuel cells.

Abstract: The present invention is a manufacturing method for a solid oxide fuel cell apparatus in which multiple fuel cells are adhered and affixed to a first affixing member attached within a fuel cell module, the method includes steps of: inserting one end portion of each fuel cell into respective insertion holes provided in a first affixing member; respectively positioning one end portion of each fuel cell inserted into each insertion hole relative to a fuel cell module; respectively positioning the other end portion of each fuel cell at a predetermined position relative to the fuel cell module; applying ceramic adhesive onto the first affixing member into which each of the fuel cells is inserted; and hardening the applied ceramic adhesive and affixing each of the fuel cells to the first affixing member.

Abstract: On the other hand, the possibility of estimating the dopant ratio of a metal element to each ceria crystalline particle using integral-width or half-width obtained by XRD was considered as follows: an XRD peak is shifted depending on the dopant ratio of La to ceria; when La increases, an XRD peak is shifted to a lower angle; in XRD performed on a raw material obtained by mixing ceria crystalline particles having different dopant ratio, peaks corresponding to the respective dopant ratio exist close to each other; as a result, a peak width is widened; accordingly, the dopant ratio of a metal element to each ceria crystalline particles are supposed to vary when integral-width and half-width obtained by XRD are large. Thus, it was revealed for the first time that integral-width and half-width obtained by XRD indicate variations in dopant ratio. It should be noted that from the direct proportional relationship between the dopant ratio x and the integral-width for dopant ratio ranging from 0.35 to 0.

Abstract: Disclosed is a solid oxide fuel cell which includes an inner electrode, a solid electrolyte, and an outer electrode, each being sequentially laminated on the surface of a porous support. The porous support contains forsterite, and further has a strontium element concentration of 0.02 mass % to 1 mass % both inclusive in terms of SrO based on the mass of the forsterite.

Abstract: Provided is a solid oxide fuel cell which includes a fuel electrode, a solid electrolyte, and an air electrode, each being sequentially laminated on the surface of a porous support. The porous support comprises forsterite and a nickel element. Ni and/or NiO fine particles are exposed on a surface of a sintered compact of the forsterite constituting the porous support.