Abstract: Provided is a porous current collector which is used for a fuel electrode and has a high gas reforming function and high durability. A porous current collector 9 is provided adjacent to a fuel electrode 4 of a fuel cell 101 that includes a solid electrolyte layer 2, the fuel electrode 4 disposed on one side of the solid electrolyte layer, and an air electrode 3 disposed on the other side. The porous current collector includes a porous metal body 1 and a first catalyst 20. The porous metal body has an alloy layer 12a at least on a surface thereof, the alloy layer containing nickel (Ni) and tin (Sn). The first catalyst, which is in the form of particles, is supported on a surface of the alloy layer, the surface facing pores of the porous metal body, and is capable of processing a carbon component contained in a fuel gas that flows inside the pores.

Abstract: A method for producing an anode capable of increasing output of a solid oxide fuel cell is provided. The method for producing an anode for a solid oxide fuel cell includes a first step of shaping a mixture that contains a perovskite oxide having proton conductivity and a nickel compound and a second step of firing a shaped product, which has been obtained in the first step, in an atmosphere containing 50% by volume or more of oxygen at 1100° C. to 1350° C. so as to generate an anode.

Abstract: In an SOFC, a solid electrolyte layer and an anode are integrated with each other to provide an electrolyte layer-anode assembly. The anode contains a nickel element and a first proton conductor. The first proton conductor is composed of a first perovskite oxide having proton conductivity. The first perovskite oxide has an AXO3-type crystal structure, the A-site containing Ba, the X-site containing Y and at least one selected from the group consisting of Zr and Ce. The nickel element is at least partially in the form of NiO. The anode has a porosity Pa of 10% or more by volume when INi/INiO?0.1, where INi/INiO denotes a relative intensity ratio of the peak intensity INi of metallic Ni to the peak intensity INiO of the NiO in an XRD spectrum of the anode.

Abstract: A method for producing a cell structure includes: a step of firing a laminated body of a layer containing an anode material and a layer containing a solid electrolyte material, to obtain a joined body of an anode and a solid electrolyte layer; a step of laminating a layer containing a cathode material on a surface of the solid electrolyte layer, and firing the obtained laminated body to obtain a cathode. The anode material contains a metal oxide Ma1 and a nickel compound. The metal oxide Ma1 is a metal oxide having a perovskite structure represented by A1x1B11-y1M1y1O3-? (wherein: A1 is at least one of Ba, Ca, and Sr; B1 is at least one of Ce and Zr; M1 is at least one of Y, Yb, Er, Ho, Tm, Gd, In, and Sc; 0.85?x1?0.99; 0<y1?0.5; and ? is an oxygen deficiency amount).

Abstract: A proton conductor contains a metal oxide having a perovskite structure and represented by AaBbMcO3-? (wherein: A is at least one of Ba, Ca, and Sr; B is at least one of Ce and Zr; M is at least one of Y, Yb, Er, Ho, Tm, Gd, and Sc; 0.85?a?1; 0.5?b<1; c=1-b; and ? is an oxygen deficiency amount), and a standard deviation in a triangular diagram representing an atomic composition ratio of the A, the B, and the M is not greater than 0.04.

Abstract: A gas decomposition device 100 includes one or two or more membrane electrode assemblies 5, each including a solid electrolyte layer 2, an anode layer 3 stacked on a first side of the solid electrolyte layer 2, and a cathode layer 4 stacked on a second side of the solid electrolyte layer; and porous current collectors 8a, 8b, and 8c including continuous pores 1b, the membrane electrode assemblies being stacked with the porous current collector, the solid electrolyte layer being composed of a proton-conducting solid electrolyte, the porous current collectors including porous metal bodies 1, each of the porous metal bodies 1 including an alloy layer 12a having corrosion resistance on at least a surface of the porous metal body 1 facing the continuous pores, and the porous metal bodies forming gas channels 9a, 9b, and 9c that supply gases to the anode layer and the cathode layer.

Abstract: An object is to provide a solid electrolyte laminate that allows a large amount of gas to be supplied to a fuel electrode while having improved strength and a method for manufacturing such a solid electrolyte laminate. A solid electrolyte laminate 1 includes a solid electrolyte layer 2, a first electrode layer 3 disposed on one side of the solid electrolyte layer, and a second electrode layer 4 disposed on another side of the solid electrolyte layer. At least the first electrode layer, which forms a fuel electrode, includes a bonding layer 3a bonded to the solid electrolyte layer and a porous layer 3b having continuous pores and integrally formed on the bonding layer.

Abstract: Provided is a solid electrolyte laminate comprising a solid electrolyte layer having proton conductivity and a cathode electrode layer laminated on one side of the solid electrolyte layer and made of lanthanum strontium cobalt oxide (LSC). Also provided is a method for manufacturing the solid electrolyte. This solid electrolyte laminate can further comprise an anode electrode layer made of nickel-yttrium doped barium zirconate (Ni—BZY). This solid electrolyte laminate is suitable for a fuel cell operating in an intermediate temperature range less than or equal to 600° C.

Abstract: A fuel cell includes a MEA that includes a cathode, an anode, and a solid electrolyte layer disposed between the cathode and the anode, the solid electrolyte layer containing an ion-conducting solid oxide; at least one first porous metal body adjacent to at least one of the cathode and the anode and having a three-dimensional mesh-like skeleton; a second porous metal body stacked to be adjacent to the first porous metal body and having a three-dimensional mesh-like skeleton; and an interconnector adjacent to the second porous metal body. The first porous metal body has a pore size smaller than a pore size of the second porous metal body.

Abstract: A fuel cell includes a MEA that includes a cathode, an anode, and a solid electrolyte layer disposed between the cathode and the anode, the solid electrolyte layer containing an ion-conducting solid oxide; at least one first porous metal body arranged to oppose at least one of the cathode and the anode; and an interconnector arranged to oppose the first porous metal body and having a gas supply port and a gas discharge port formed therein. The first porous metal body includes a porous metal body S that opposes the gas supply port and has a three-dimensional mesh-like skeleton, and a porous metal body H that has a three-dimensional mesh-like skeleton and is other than the porous metal body S. A porosity Ps of the porous metal body S and a porosity Ph of the porous metal body H satisfy a relationship: Ps<Ph.

Abstract: An electrolyte layer-anode composite member for a fuel cell includes a solid electrolyte layer containing an ionically conductive metal oxide M1, a first anode layer containing an ionically conductive metal oxide M2 and nickel oxide, and a second anode layer interposed between the solid electrolyte layer and the first anode layer and containing an ionically conductive metal oxide M3 and nickel oxide. A volume content Cn1 of the nickel oxide in the first anode layer and a volume content Cn2 of the nickel oxide in the second anode layer satisfy the relation Cn1<Cn2.

Abstract: Provided is an electrode catalyst material that has an increased reduction rate of a nickel catalyst and thus an improved catalytic function in a fuel cell. The electrode catalyst material for fuel cells contains nickel oxide and cobalt oxide. The electrode catalyst material contains a cobalt metal component in an amount of 2 to 15 mass % with respect to the total mass of a nickel metal component and the cobalt metal component.

Abstract: A composite material including a first porous metal body having a three-dimensional mesh-like skeleton, a second porous metal body having a three-dimensional mesh-like skeleton, and a bonding portion formed by entanglement of the skeleton of the first porous metal body and the skeleton of the second porous metal body. The porosity of the first porous metal body may be different from the porosity of the second porous metal body.

Abstract: A solid electrolyte layer contains a proton conductor having a perovskite structure, the proton conductor being represented by formula (1): BaxZryCezM1?(y+z)O3?? (where element M is at least one selected from the group consisting of Y, Yb, Er, Ho, Tm, Gd, and Sc, 0.85?x<0.98, 0.70?y+z<1.00, a ratio of y/z is 0.5/0.5 to 1/0, and ? is an oxygen vacancy concentration).

Abstract: A method for manufacturing a ceramic material includes a step of performing heat treatment in a reducing atmosphere on a ceramic material in which a metallic oxide is diffused in crystal grains, thereby to reduce the metallic oxide to deposit a metallic element at grain boundaries of the ceramic material.

Abstract: Provided is a solid electrolyte made of yttrium-doped barium zirconate having hydrogen ion conductivity, a doped amount of yttrium being 15 mol % to 20 mol %, and a rate of increase in lattice constant at 100° C. to 1000° C. with respect to temperature changes being substantially constant. Also provided is a method for manufacturing the solid electrolyte. This solid electrolyte can be formed as a thin film, and a solid electrolyte laminate can be obtained by laminating electrode layers on this solid electrolyte. This solid electrolyte can be applied to an intermediate temperature operating fuel cell.

Abstract: A method for producing an anode capable of increasing output of a solid oxide fuel cell is provided. The method for producing an anode for a solid oxide fuel cell includes a first step of shaping a mixture that contains a perovskite oxide having proton conductivity and a nickel compound and a second step of firing a shaped product, which has been obtained in the first step, in an atmosphere containing 50% by volume or more of oxygen at 1100° C. to 1350° C. so as to generate an anode.

Abstract: The present invention inexpensively provides an electrode material for a fuel electrode, the electrode material having CO2 resistance and being capable of forming a fuel cell having high electricity generation performance. An electrode material for a fuel electrode, the electrode material constituting a fuel electrode of a fuel cell including a proton-conductive solid electrolyte layer, includes a perovskite-type solid electrolyte component and a nickel (Ni) catalyst component, in which the solid electrolyte component includes a barium component, a zirconium component, a cerium component, and a yttrium component, and the mixture ratio of the zirconium component to the cerium component in the solid electrolyte component is set to be 1:7 to 7:1 in terms of molar ratio.

Abstract: A cell structure includes a cathode, an anode, and a protonically conductive solid electrolyte layer between the cathode and the anode. The solid electrolyte layer contains a compound having a perovskite structure and containing zirconium, cerium, and a rare-earth element other than cerium. If the solid electrolyte layer has a thickness of T, the elemental ratio of zirconium to cerium at a position 0.25 T from a surface of the solid electrolyte layer opposite the cathode, ZrC/CeC, and the elemental ratio of zirconium to cerium at a position 0.25 T from a surface of the solid electrolyte layer opposite the anode, ZrA/CeA, satisfy ZrC/CeC>ZrA/CeA, and ZrC/CeC>1.

Abstract: Provided are a membrane electrode assembly, including a solid electrolyte layer, an anode layer provided on one side of the solid electrolyte layer, and a cathode layer provided on the other side of the solid electrolyte layer, the anode layer being stacked on the solid electrolyte layer to be pressed thereagainst, the anode layer including a porous anode member having electrical conductivity; and a method for manufacturing the same.