Saint-gobain Ceramics & Plastics, Inc.

Aravind Mohanram

Yeshwanth Narendar

Guangyong Lin

John D Pietras

Brian P Feldman

Samuel Marlin

Caroline Levy

F Michael Mahoney

Hansong Huang

Craig M Adams

Wesley R Robbins

Zachary R Patterson

Ayhan Sarikaya

Qiang Zhao

Robert J Sliwoski

A solid oxide fuel cell with a dense barrier layer formed at or near the outer surface of the top and/or bottom electrode layers in a fuel cell stack. The dense barrier layer (DBL) acts as a seal to prevent gas in the electrode layer (either air in a cathode layer or fuel gas in an anode layer) from leaking out of the stack though the outer surface of the outermost electrode layers. The use of a DBL with porous outer electrode layers reduces the amount of gas escaping the stack and minimizes the chances for leak-induced problems ranging from decreases in performance to catastrophic stack failure.

Solid oxide fuel cell having a dense barrier layer

Embodiments of the present disclosure relate to a hot press and methods of using the hot press. In an embodiment, the hot press can include a pressing element including a flared body. In another embodiment, the hot press can include a compression surface. The compression surface can include a first layer including a monocrystalline material and a second layer including a polycrystalline material, wherein the monocrystalline material and the polycrystalline material include a same primary compound. In a further embodiment, a sample including more than one layer of ceramic oxide material can be hot pressed without a die.

Hot press and method of using

A solid oxide fuel cell (SOFC) article including a SOFC unit cell having a functional layer of an average thickness of not greater than about 100 &#x3bc;m, wherein the functional layer has a first type of porosity having a vertical orientation, and the first type of porosity has an aspect ratio of length:width, the width substantially aligned with a dimension of thickness of the functional layer.

Solid oxide fuel cell articles and methods of forming

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.

Highly sinterable lanthanum strontium titanate interconnects through doping

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 dthat is greater than about 1 &#x3bc;m and a dthat is greater than about 2 &#x3bc;m.

Solid oxide fuel cell interconnect cells

A solid oxide fuel cell electrolyte is fabricated by combining an yttria-stabilized zirconia powder with &#x3b1;-AlOhaving a dparticle size in a range of between about 10 nm and about 200 nm and MnOto form an electrolyte precursor composition, and then sintering the electrolyte precursor composition to thereby form the electrolyte. The &#x3b1;-AlOand MnOcan 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.

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Northborough, MA, United States of America

Aravind Mohanram