Technical University of Denmark

Peter Halvor Larsen

Mogens Bjerg Mogensen

Peter Vang Hendriksen

Søren Linderoth

Soeren Linderoth

Soren Linderoth

Lars Mikkelsen

Anders Smith

Weiguo Wang

Mette Solvang

Ming Chen

Kent Kammer Hansen

Karsten Agersted Nielsen

Karen Brodersen

Charissa Chung

Sören Linderoth

Chen Ming

The present invention relates to a thin and in principle unsupported solid oxide cell, comprising at least a porous anode layer, an electrolyte layer and a porous cathode layer, wherein the anode layer and the cathode layer comprise an electrolyte material, at least one metal and a catalyst material, and wherein the overall thickness of the thin reversible cell is about 150 &#x3bc;m or less, and to a method for producing same. The present invention also relates to a thin and in principle unsupported solid oxide cell, comprising at least a porous anode layer, an electrolyte layer and a porous cathode layer, wherein the anode layer and the cathode layer comprise an electrolyte material and a catalyst material, wherein the electrolyte material is doper zirconia, and wherein the overall thickness of the thin reversible cell is about 150 &#x3bc;m or less, and to a method for producing same. The present invention further provides a thin separation membrane, comprising at least a porous anode layer, a membrane layer comprising a mixed conducting material and a porous cathode layer, wherein the anode layer and the cathode layer comprise the mixed conducting material and a catalyst material, and wherein the overall thickness of the thin separation membrane is about 1050 &#x3bc;m or less.

Thin solid oxide cell

A reversible SOFC monolithic stack is provided which comprises: 1) a first component which comprises at least one porous metal containing layer () with a combined electrolyte and sealing layer on the porous metal containing layer (); wherein the at least one porous metal containing layer () hosts an electrode; 2) a second component comprising at least one porous metal containing layer () with a combined interconnect and sealing layer on the porous metal containing layer; wherein the at least one porous metal containing layers hosts an electrode. Further provided is a method for preparing a reversible solid oxide fuel cell stack. The obtained solid oxide fuel cell stack has improved mechanical stability and high electrical performance, while the process for obtaining same is cost effective.

Reversible solid oxide fuel cell stack and method for preparing same

The present invention provides a solid oxide cell comprising a support layer, a first electrode layer, an electrolyte layer, and a second cathode layer, wherein at least one of the electrode layers comprises electrolyte material, a catalyst and agglomerated particles selected from the group consisting of alkali oxides, earth alkali oxides and transition metal oxides.

Removal of impurity phases from electrochemical devices

The present invention provides a membrane, comprising in this order a first catalyst layer, an electronically and ionically conducting layer having a nanosized microstructure, and a second catalyst layer, characterized in that the electronically and ionically conducting layer is formed from an electrolyte material, a grain growth inhibitor and/or grain boundary modifier, and a method for producing same.

Membrane with a stable nanosized microstructure and method for producing same

A multi-layer coating for protection of metals and alloys against oxidation at high temperatures is provided. The invention utilizes a multi-layer ceramic coating on metals or alloys for increased oxidation-resistance, comprising at least two layers, wherein the first layer () and the second layer () both comprise an oxide, and wherein the first layer () has a tracer diffusion coefficient for cations M, where M is the scale forming element of the alloy, and the second layer () has a tracer diffusion coefficient for oxygen ions Osatisfying the following formula: 

Multi-layer coating

The present invention provides a graded multilayer structure, comprising a support layer () and at least 10 layers () forming a graded layer, wherein each of the at least 10 layers () is at least partially in contact with the support layer (),

Horizontally graded structures for electrochemical and electronic devices

A method of producing a reversible solid oxide cell. The method includes the steps of tape casting an anode support layer on a support (); tape casting an anode layer on a support (); tape casting an electrolyte layer on a support (); and either laminating said anode layer on top of said anode support layer; removing said support () from said anode layer; laminating said electrolyte layer on top of said anode layer; and sintering the multilayer structure; or laminating said anode layer on top of said electrolyte layer; removing said support () from said anode layer; laminating said anode support layer on top of said anode layer; and sintering the multilayer structure.

Method for the manufacture of reversible solid oxide cells

The present invention provides an all ceramics solid oxide cell, comprising an anode layer, a cathode layer, and an electrolyte layer sandwiched between the anode layer and the cathode layer, wherein the electrolyte layer comprises doped zirconia and has a thickness of from 40 to 300 &#x3bc;m; wherein the anode layer and the cathode layer both comprise doped ceria or both comprise doped zirconia; and wherein the multilayer structure formed of the anode layer, the electrolyte layer and the cathode layer is a symmetrical structure. The present invention further provides a method of producing said solid oxide cell.

All ceramics solid oxide fuel cell

A reversible solid oxide fuel cell obtainable by a method comprising the steps of:

Metal supported solid oxide fuel cell

The present invention provides a method of producing a solid oxide fuel cell, comprising the steps of: forming an anode support layer; applying an anode layer on the anode support layer; applying an electrolyte layer on the anode layer; and sintering the obtained structure; wherein the anode support layer and/or the anode layer comprises a composition comprising doped zirconia, doped ceria and/or a metal oxide with an oxygen ion or proton conductivity, NiO and at least one oxide selected from the group consisting of AlO, TiO, CrO, ScO, VO, TaO, MnO, NbO, CaO, BiO, LnO, MgCrO, MgTiO, CaAlO, LaAlO, YbCrO, ErCrO, NiTiO, NiCrO, and mixtures thereof. According to the invention, a combination of nickel coarsening prevention due to specific Ni-particle growth inhibitors, and, at the same time, a strengthening of the ceramic structure of the anode support layer and/or the anode layer is achieved.

Redox-stable anode

The present invention provides a method for producing a multilayer structure, comprising the steps of: providing a composition comprising a Fe&#x2014;Cr alloy powder and at least one of the oxides of Fe, Cr, Ni, Co, Zn, Cu; forming a first layer of said composition; forming at least one additional layer on one side of said first layer; heat treating said layers in an oxygen-containing atmosphere; and sintering in a reducing atmosphere so as to provide a final alloy, wherein the amount of Fe in the final alloy of the first layer after the sintering step is in the range of from about 50-90% by weight, based on the total weight of the final alloy.

Method for shrinkage and porosity control during sintering of multilayer structures

A method of manufacturing metal to glass, metal to metal and metal to ceramic connections to be used in SOFC applications, said connections being produced as a mixture of a base glass powder and a metal oxide powder. As a result, the inherent properties of the glass used in the composite seals may be altered locally in the metal-coating interface by adding e.g. MgO in order to control the viscosity and wetting, and at the same time maintain the bulk properties such as high coefficient of thermal expansion of the basic glass towards the seal components.

Method of producing metal to glass, metal to metal or metal to ceramic connections

SOFC cell comprising a metallic supportending in a substantially pure electron conducting oxide, an active anode layerconsisting of doped ceria, ScYSZ, Ni&#x2014;Fe alloy, an electrolyte layerconsisting of co-doped zirconia based on oxygen ionic conductor, an active cathode layerand a layer of a mixture of LSM and a ferrite as a transition layerto a cathode current collectorof single phase LSM. The use of a metallic support instead of a Ni&#x2014;YSZ anode support increases the mechanical strength of the support and secures redox stability of the support. The porous ferrite stainless steel ends in a pure electron conducting oxide so as to prevent reactivity between the metals in the active anode which tends to dissolve into the ferrite stainless steel causing a detrimental phase shift from ferrite to austenite structure.

Solid oxide fuel cell

The present invention provides a method for producing a reversible solid oxide fuel cell, comprising the steps of: &#x2014;providing a metallic support layer; &#x2014;forming a cathode precursor layer on the metallic support layer; &#x2014;forming an electrolyte layer on the cathode precursor layer; &#x2014;sintering the obtained multilayer structure; &#x2014;impregnating the cathode precursor layer so as to form a cathode layer; and&#x2014;forming an anode layer on top of the electrolyte layer. Furthermore, a reversible SOFC is provided which is obtainable by said method. The method advantageously allows for a greater choice of anode materials, resulting in more freedom in cell design, depending on the desired application.

Growing community of inventors

Roskilde, Denmark

Peter Halvor Larsen