Abstract: A dielectric of the present disclosure includes a tantalum compound containing fluorine and oxygen and being amorphous, and is advantageous in terms of achieving a high dielectric constant.

Abstract: A fuel cell system including: an electrochemical pump including a first anode, a first cathode, and a first electrolyte membrane including a proton conductive oxide, the electrochemical pump separating hydrogen from a gas containing the hydrogen, and a solid oxide fuel cell that includes a second anode, a second cathode, and a second electrolyte membrane including a solid oxide electrolyte, and that generates electricity by reacting a fuel gas and an oxidant gas with each other.

Abstract: An electrode material of the present disclosure is an electrode material that includes a compound represented by the chemical formula BaZr1-x-yMxCoyO3-?. M is In or Yb, and the chemical formula satisfies 0<x<1, 0<y<1, 0<(x+y)<1, and 0<?<1. A membrane electrode assembly of the present disclosure includes a first electrode including the electrode material, and an electrolyte membrane provided on a first main surface of the first electrode.

Abstract: A membrane electrode assembly of an electrochemical device includes a proton conductive solid electrolyte membrane and an electrode including Ni and an electrolyte material which contains as a primary component, at least one of a first compound having a composition represented by BaZr1-x1M1x1O3 (M1 represents at least one element selected from trivalent elements each having an ion radius of more than 0.720 A° to less than 0.880 A°, and 0<x1<1 holds) and a second compound having a composition represented by BaZr1-x2Tmx2O3 (0<x2<0.3 holds).

Abstract: The fuel cell of the present disclosure includes: a fuel single cell comprising a fuel electrode, an air electrode, and an electrolyte disposed between the electrodes; a separator for separating a fuel gas flowing through the fuel electrode and air flowing through the air electrode; and a sealing portion for hermetically bonding between the separator and the electrolyte, wherein the sealing portion is constituted of a glass composition containing at least two of metallic or metalloid elements contained in the electrolyte and at least two of metallic or metalloid elements contained in the separator; the electrolyte includes a proton conductor; and the proton conductor is represented by a compositional formula: BaZr1-xMxO3, where 0.05?x?0.5; and M is at least one selected from the group consisting of Sc, In, Lu, Yb, Tm, Er, Y, Ho, Dy, and/or Gd.

Abstract: The electrochemical apparatus of the present disclosure includes a first stack that includes an oxide ion conductor as an electrolyte and decomposes water vapor to generate hydrogen and oxygen, a second stack that includes a proton conductor as an electrolyte and separates the hydrogen generated in the first stack from a gas mixture of the hydrogen and the water vapor that has not been decomposed in the first stack, and a heat insulation material that covers the first stack and the second stack.

Abstract: An electrochemical cell of the present disclosure includes a first cell and a second cell. The first cell includes a first electrolyte layer containing an oxide ion conductor. The second cell includes a second electrolyte layer containing a proton conductor, and the second cell is disposed to face the first cell.

Abstract: An electrochemical cell includes a first electrolyte layer containing an oxide-ion conductor, a second electrolyte layer containing a proton conductor, a first electrode which is disposed between the first electrolyte layer and the second electrolyte layer and in contact with a first principal surface of the first electrolyte layer and a first principal surface of the second electrolyte layer and into which a gas flows, a second electrode which is provided on a second principal surface of the first electrolyte layer and which generates oxygen, and a third electrode which is provided on a second principal surface of the second electrolyte layer and which generates hydrogen.

Abstract: A membrane electrode assembly according to the present disclosure includes an electrolyte membrane containing a proton conductive oxide and an electrode containing a lanthanum strontium cobalt iron composite oxide located on the electrolyte membrane, wherein, in the electrode, the ratio of the number of moles of cobalt to the sum of the number of moles of cobalt and the number of moles of iron is 0.35 or more and 0.6 or less.

Abstract: A membrane electrode assembly according to the present disclosure is a membrane electrode assembly including: a solid electrolyte membrane containing an electrolyte material; and an electrode in contact with a reactant gas, wherein the electrode includes a structural support including a ceramic member, and a pore extending from a boundary surface in contact with the reactant gas toward the solid electrolyte membrane in the structural support and filled with a filler having at least one selected from the group consisting of hydrogen oxidation activity, oxygen reduction activity, proton reduction activity, steam decomposition activity, and oxide ion oxidation activity.

Abstract: The fuel cell of the present disclosure includes: a unit cell including: a fuel electrode, an air electrode and electrolyte disposed between the fuel electrode and the air electrodes; a separator for separating a fuel gas flowing though the fuel electrode and air flowing through the air electrode; and a sealing constituted of a glass composition for bonding the separator and the electrolyte, and at least a surface region of the sealing portion exposed to the fuel gas and the air does not contain Ba.

Abstract: A membrane electrode assembly of an electrochemical device includes a proton conductive solid electrolyte membrane and an electrode including Ni and an electrolyte material which contains as a primary component, at least one of a first compound having a composition represented by BaZr1-x1M1x1O3 (M1 represents at least one element selected from trivalent elements each having an ion radius of more than 0.720 A° to less than 0.880 A°, and 0<x1<1 holds) and a second compound having a composition represented by BaZr1-x2Tmx2O3 (0<x2<0.3 holds).

Abstract: A membrane electrode assembly of an electrochemical device includes a proton conductive solid electrolyte membrane and an electrode including Ni and an electrolyte material which contains as a primary component, at least one of a first compound having a composition represented by BaZr1-x1M1x1O3 (M1 represents at least one element selected from trivalent elements each having an ion radius of more than 0.720 A° to less than 0.880 A°, and 0<x1<1 holds) and a second compound having a composition represented by BaZr1-x2Tmx2O3 (0<x2<0.3 holds).

Abstract: The fuel cell of the present disclosure includes: a unit cell including: a fuel electrode, an air electrode and electrolyte disposed between the fuel electrode and the air electrodes; a separator for separating a fuel gas flowing though the fuel electrode and air flowing through the air electrode; and a sealing constituted of a glass composition for bonding the separator and the electrolyte, and at least a surface region of the sealing portion exposed to the fuel gas and the air does not contain Ba.

Abstract: The fuel cell of the present disclosure includes: a fuel single cell comprising a fuel electrode, an air electrode, and an electrolyte disposed between the electrodes; a separator for separating a fuel gas flowing through the fuel electrode and air flowing through the air electrode; and a sealing portion for hermetically bonding between the separator and the electrolyte, wherein the sealing portion is constituted of a glass composition containing at least two of metallic or metalloid elements contained in the electrolyte and at least two of metallic or metalloid elements contained in the separator; the electrolyte includes a proton conductor; and the proton conductor is represented by a compositional formula: BaZr1-xMxO3, where 0.05?x?0.5; and M is at least one selected from the group consisting of Sc, In, Lu, Yb, Tm, Er, Y, Ho, Dy, and/or Gd.

Abstract: A membrane electrode assembly includes an electrode consisting of at least one compound selected from the group consisting of lanthanum strontium cobalt complex oxide, lanthanum strontium cobalt iron complex oxide, and lanthanum strontium iron complex oxide, or consisting of a composite of the at least one compound and an electrolyte material, and a first solid electrolyte membrane represented by a composition formula of BaZr1?xLuxO3?? (0<x<1). The electrode is in contact with the first solid electrolyte membrane.

Abstract: A membrane electrode assembly of an electrochemical device includes a proton conductive solid electrolyte membrane and an electrode including Ni and an electrolyte material which contains as a primary component, at least one of a first compound having a composition represented by BaZr1-x1M1x1O3 (M1 represents at least one element selected from trivalent elements each having an ion radius of more than 0.720 A° to less than 0.880 A°, and 0<x1<1 holds) and a second compound having a composition represented by BaZr1-x2Tmx2O3 (0<x2<0.3 holds).