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: 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.

Abstract: A current collector included in a fuel cell, the fuel cell including a membrane electrode assembly including a solid polymer electrolyte layer and a pair of electrode layers formed to sandwich the solid polymer electrolyte layer, the current collector stacked on each electrode layer, and a gas flow path for supply of a gas to each electrode layer, the current collector including a metal porous body which is stacked on the electrode layer, has a flowing gas supplied to the electrode layer, and is rendered conducting to the electrode layer, and the metal porous body including an electrically conductive layer containing electrically conductive particles fixed to a corrosion-resistant and water-repellent resin at least on a side of the electrode layer.

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 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 inexpensive porous current collector having high durability is provided by forming a silver layer having high strength on a current collector formed from a nickel porous base material. Porous current collectors 8a and 9a are used in a fuel cell 101 including a solid electrolyte layer 2, a first electrode layer 3 on one side of the solid electrolyte layer, and a second electrode layer 4 on the other side. The porous current collectors each include: an alloy layer 60a, which is formed from a tin (Sn)-containing alloy, at least on the surfaces of continuous pores 52 of a nickel porous base material 60 having the continuous pores 52; and a silver layer 55 stacked on the alloy layer.

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: 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: There is provided a composite material for a fuel cell, in which in the case where an electrolyte-anode laminate is co-fired, the composite material is capable of inhibiting a decrease in the ion conduction performance of a solid electrolyte layer to enhance the power generation performance of the fuel cell. A composite material 1 for a fuel cell includes a solid electrolyte layer 3 and an anode layer 2 stacked on the solid electrolyte layer, in which the solid electrolyte layer is composed of an ionic conductor in which the A-site of a perovskite structure is occupied by at least one of barium (Ba) and strontium (Sr) and tetravalent cations in the B-sites are partially replaced with a trivalent rare-earth element, the anode layer contains an electrolyte component having the same composition as the solid electrolyte layer, a nickel (Ni) catalyst, and an additive containing a rare-earth element, the additive being located at least at an interfacial portion with the solid electrolyte layer.