Abstract:
An electrochemical energy conversion device 10 comprising a stack of solid oxide electrochemical cells 12 alternating with gas separators 14, 16, wherein scavenger material selected from one or both of free alkali metal oxygen-containing compounds and free alkaline earth metal oxygen-containing compounds is provided in or on one or more of the negative electrode-side of the cell 12, the adjacent gas separator 16 and any other structure of the device 10 forming a gas chamber 66 between the cell and the gas separator. The invention also extends to the treated cell 12.
Abstract:
A composite anode for a solid oxide fuel cell (SOFC), comprising an anode support layer (ASL) of Ni- YSZ and an anode functional layer (AFL) of Ni-GDC, displays enhanced mechanical stability and similar or improved electrical efficiency to that of a Ni-GDC ASL for otherwise identical SOFCs. A SOFC employing the composite anode can be used for power generation at temperatures below 700 °C, where the composite anode may include a second AFL of GDC disposed between the Ni-GDC layer and a GDC electrolyte.
Abstract:
A solid oxide fuel cell is anode reduced without the use of a reducing gas by applying a voltage to the cell when the temperature is elevated to a target temperature.
Abstract:
A solid oxide fuel cell includes an anode layer, a cathode layer, and an electrolyte layer partitioning the anode layer and the cathode layer. The anode layer and the cathode layer are of about the same thickness and have about the same coefficient of thermal expansion (CTE).
Abstract:
A method of making a solid oxide fuel cell (SOFC) includes forming a first sublayer of a first electrode on a first side of a planar solid oxide electrolyte and drying the first sublayer of the first electrode. The method also includes forming a second sublayer of the first electrode on the dried first sublayer of the first electrode prior to firing the first sublayer of the first electrode, firing the first and second sublayers of the first electrode during the same first firing step, and forming a second electrode on a second side of the solid oxide electrolyte.
Abstract:
Poudre de grains comportant un cermet fondu d'oxyde de zirconium ZrO 2 , dopé avec un dopant choisi parmi l'yttrium, le scandium, un mélange de scandium et d'aluminium et/ou de cérium, et de nickel Ni et/ou de cobalt Co, ledit cermet présentant une structure eutectique, les teneurs, en pourcentages molaires, en oxyde de zirconium, en nickel et en cobalt étant telles que 0,250.Ni + 0,176.Co ≤ (ZrO 2 + dopant) ≤ 0,428.Ni + 0,333.Co, ladite poudre présentant un diamètre médian D 50 compris entre 0,3 µm et 100 µm.
Abstract:
An anode component of a solid oxide fuel cell is formed by combining a relatively coarse yttria-stabilized-zirconium (YSZ) powder, that is substantially composed of elongated particles, with a relatively fine NiO/YSZ or NiO powder of reduced particle size, whereby, upon sintering the combined powders, the coarse YSZ powder forms a microstructural cage of open porosity wherein the fine powder is distributed through the open porosity of the cage. A method of forming a cathode component includes combining a coarse YSZ powder, that is substantially composed of elongated particles, with a fine lanthanum strontium manganite powder of reduced particle size, whereby, upon sintering the combined powders, the coarse YSZ powder forms a microstructural cage of open porosity, wherein the fine powder is distributed through the open porosity of the cage.