Abstract:
A solid oxide fuel cell electrolyte is fabricated by combining an yttria- stabilized zirconia powder with α- Al 2 O 3 having a d 5o particle size in a range of between about 10 nm and about 200 nm and Mn 2 O 3 to form an electrolyte precursor composition, and then sintering the electrolyte precursor composition to thereby form the electrolyte. The α- Al 2 O 3 and Mn 2 O 3 can be present in the electrolyte precursor composition in an amount in a range of between about 0.25 mol% and about 5 mol%. The electrolyte can be a component of a solid oxide fuel cell of the invention.
Abstract translation:通过将氧化钇稳定的氧化锆粉末与d 50粒径在约10nm至约200nm范围内的Al 2 O 3与Mn 2 O 3组合以形成电解质前体组合物来制造固体氧化物燃料电池电解质,然后烧结 电解质前体组合物,从而形成电解质。 a-Al 2 O 3和Mn 2 O 3可以以约0.25mol%至约5mol%的量存在于电解质前体组合物中。 电解质可以是本发明的固体氧化物燃料电池的组分。
Abstract:
An interconnect of a solid oxide fuel cell article is disclosed. The interconnect is disposed between a first electrode and a second electrode of the solid oxide fuel cell article. The interconnect comprises a first phase including a ceramic interconnect material and a second phase including partially stabilized zirconia. The partially stabilized zirconia may be in a range of between about 0.1 vol% and about 70 vol% of the total volume of the interconnect.
Abstract:
A bonding layer, disposed between an interconnect layer and an electrode layer of a solid oxide fuel cell article, may be formed from a yttria stabilized zirconia (YSZ) powder having a monomodal particle size distribution (PSD) with a d50 that is greater than about 1 µm and a d90 that is greater than about 2 µm.
Abstract:
A solid oxide fuel cell includes an anode layer, an electrolyte layer over a surface of the anode layer, and a cathode layer over a surface of the electrolyte layer. The cathode layer includes a cathode bulk layer, a porous cathode functional layer at an electrolyte, an intermediate cathode layer partitioning the cathode bulk layer and the porous cathode functional layer, the porous intermediate cathode layer having a porosity greater than that of the cathode bulk layer. The solid oxide fuel cells can be combined to form subassemblies that are bonded together to form solid oxide fuel cell assemblies.
Abstract:
A method for forming a solid oxide fuel cell (SOFC) article includes forming a SOFC unit cell in a single, free-sintering process, wherein the SOFC unit cell is made of an electrolyte layer, an interconnect layer, a first electrode layer disposed between the electrolyte layer and the interconnect layer. The electrolyte layer of the SOFC unit cell is in compression after forming.
Abstract:
A sintered ceramic component can have a final composition including at least 50 wt.% MgO and at least one desired dopant, wherein each dopant of the at least one desired dopant has a desired dopant content of at least 0.1 wt.%. All impurities (not including the desired dopant(s)) are present at a combined impurity content of less than 0.7 wt.%. A remainder can include A1 2 O 3 . The selection of dopants can allow for better control over the visual appearance of the sintered ceramic component, reduces the presence of undesired impurities that may adversely affect another part of an apparatus, or both. The addition of the dopant(s) can help to improve the sintering characteristics and density as compared to a sintered ceramic component that includes the material with no dopant and a relatively low impurity content.
Abstract:
An interconnect material is formed by combining a lanthanum-doped strontium titanate with an aliovalent transition metal to form a precursor composition and sintering the precursor composition to form the interconnect material. The aliovalent transition metal can be an electron- acceptor dopant, such as manganese, cobalt, nickel or iron, or the aliovalent transition metal can be an electron-donor dopant, such as niobium or tungsten. A solid oxide fuel cell, or a strontium titanate varistor, or a strontium titanate capacitor can include the interconnect material that includes a lanthanum-doped strontium titanate that is further doped with an aliovalent transition metal.
Abstract:
A fuel cell (10) comprises a plurality of sub-cells, each sub-cell (12) including a first electrode (14) in fluid communication with a source of oxygen gas, a second electrode (16) in fluid communication with a source of a fuel gas, and a solid electrolyte (22) between the first (14) electrode and the second (16) electrode. The sub-cells (12) are connected with each other with an interconnect (24). The interconnect (24) includes a first layer (26) in contact with the first electrode (14) of each cell, and a second layer (28) in contact with the second electrode (16) of each cell. The first layer includes a (La, Mn)Sr-titanate based perovskite represented by the empirical formula of LaySr (1-y) Ti (1-X) MnxOb. I In one embodiment, the second layer includes a (Nb, Y)Sr-titanate perovskite represented by the empirical formula of Sr (1-1.5z-o.5k+δ) Y 2 Nb k Ti (1-k) Od. in another embodiment, the interconnect has a thickness of between about 10 μm and about 100 μm, and the second layer of the interconnect includes a (La)Sr-titanate based perovskite represented by the empirical formula of Sr (1-z+δ) La 2 TiO d.