Abstract: This invention provides an electrolyte sheet for solid oxide fuel cells, characterized in: being formed by a doctor blade method or an extrusion molding method; being a scandia partially stabilized zirconia sheet, wherein 4 mol % to 6 mol % scandia is doped in a solid zirconia; a crystal structure thereof has a polycrystalline structure having a main body of tetragonal and including monoclinic phase, wherein a ratio of monoclinic phase (M), calculated by below described formula (1) from a diffraction peak intensity using X-ray diffraction, is 1% to 80%; and a Weibull modulus (m) thereof is not less than 10: a ratio of monoclinic phase(M:%)=[{monoclinic(1,1,1)+monoclinic(?1,1,1)}/{tetragonal and cubic(1,1,1)+monoclinic(1,1,1)+monoclinic(?1,1,1)}]×100??(1).

Abstract: A powder material for a fuel electrode of a solid oxide fuel cell is provided, along with a fuel electrode for a solid oxide fuel cell prepared by sintering the fuel electrode powder material, and a solid oxide fuel cell including the fuel electrode. The fuel electrode powder material includes a nickel based powder material containing at least one of nickel and nickel oxide and at least one of titanium oxide (IV) and a titanium source capable of changing into titanium oxide (IV) by heat treatment in air.

Abstract: A single cell for SOFC operating at low temperatures is provided, including a first solid electrolyte with oxide ion conductivity at 800° C. of 0.015 S/cm or more and bending strength of 600 MPa or more, a fuel electrode and bonded to one side of the first electrolyte, comprised of a cermet of a catalyst and a second solid electrolyte with a conductivity of 0.08 S/cm or more, and an air electrode bonded to the other side of the first electrolyte comprised of a compound of first perovskite type oxide with a third solid electrolyte. The electrodes are coated with fuel and air electrode contact layers, respectively.

Abstract: A single cell for SOFC operating at low temperatures is provided, including a first solid electrolyte with oxide ion conductivity at 800° C. of 0.015 S/cm or more and bending strength of 600 MPa or more, a fuel electrode and bonded to one side of the first electrolyte, comprised of a cermet of a catalyst and a second solid electrolyte with a conductivity of 0.08 S/cm or more, and an air electrode bonded to the other side of the first electrolyte comprised of a compound of first perovskite type oxide with a third solid electrolyte. The electrodes are coated with fuel and air electrode contact layers, respectively.

Abstract: A single cell for SOFC operating at low temperatures, is provided, including a first solid electrolyte with oxide ion conductivity at 800° C. of 0.015 S/cm or more and bending strength of 600 MPa or more, a fuel electrode and bonded to one side of the first electrolyte, comprised of a cermet of a catalyst and a second solid electrolyte with a conductivity of 0.08 S/cm or more, and an air electrode bonded to the other side of the first electrolyte comprised of a compound of first perovskite type oxide with a third solid electrolyte. The electrodes are coated with fuel and air electrode contact layers, respectively.

Abstract: A single cell for a solid oxide fuel cell and a solid oxide fuel cell using the same practicable and excellent in generation performance and durability, wherein a fuel electrode including a cermet of a catalyst and a second solid electrolyte with oxide ion conductivity at 1000° C. of 0.20 S/cm or more is bonded to one side of a solid electrolyte plate with the conductivity of 0.07 S/cm or more and bending strength of 700 MPa or more, and an air electrode including a compound of perovskite type transition metal oxide with a third solid electrolyte is bonded to the other side. A surface of the fuel electrode is coated with a layer, and an air electrode surface is coated with a layer, and an aqueous solution where a noble metal compound is dissolved in water is impregnated into the air electrode.

Abstract: A material for a fuel electrode of a solid oxide fuel cell with which volume change of the fuel electrode can be reduced as compared to the conventional one even if the fuel electrode is exposed to an oxidation-reduction cycle, a fuel electrode for a solid oxide fuel cell prepared by sintering the fuel electrode material, and a solid oxide fuel cell capable of stably maintaining power generation even if a fuel electrode thereof is exposed to an oxidation-reduction cycle. The fuel electrode material includes a material powder containing at least one of nickel and nickel oxide, wherein the material powder further contains at least one of titanium oxide (IV) and a titanium source capable of changing into titanium oxide (IV) by heat treatment in air. The fuel electrode material is sintered to prepare the fuel electrode, which is provided for the solid oxide fuel cell.

Abstract: A single cell for SOFC operating at low temperatures, excellent in generating performance and reliability even in a low-temperature region of the order of 600 to 900° C., and in adhesion to a separator with low current-collecting loss when used in SOFC. The cell has a first solid electrolyte with oxide ion conductivity at 800° C. of 0.015 S/cm or more and bending strength of 600 MPa or more, a fuel electrode comprised of a cermet of a catalyst and a second solid electrolyte with the conductivity of 0.08 S/cm or more, bonded to one side of the first electrolyte, and an air electrode comprised of a compound of first perovskite type oxide with a third solid electrolyte, bonded to the other side optionally via an intermediate layer comprised of a fourth solid electrolyte, and the electrodes are preferably coated with fuel and air electrode contact layers, respectively.

Abstract: A single cell for a solid oxide fuel cell and a solid oxide fuel cell using the same practicable and excellent in generation performance and durability, wherein a fuel electrode including a cermet of a catalyst and a second solid electrolyte with oxide ion conductivity at 1000° C. of 0.20 S/cm or more is bonded to one side of a solid electrolyte plate with the conductivity of 0.07 S/cm or more and bending strength of 700 MPa or more, and an air electrode including a compound of perovskite type transition metal oxide with a third solid electrolyte is bonded to the other side. A surface of the fuel electrode is coated with a layer, and an air electrode surface is coated with a layer, and an aqueous solution where a noble metal compound is dissolved in water is impregnated into the air electrode.