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Efficient reversible electrodes for solid oxide electrolyzer cells

United States Patent

July 12, 2011
View the Complete Patent at the US Patent & Trademark Office
Idaho National Laboratory - Visit the Technology Transfer and Commercialization Office Website
An electrolyzer cell is disclosed which includes a cathode to reduce an oxygen-containing molecule, such as H2O, CO2, or a combination thereof, to produce an oxygen ion and a fuel molecule, such as H2, CO, or a combination thereof. An electrolyte is coupled to the cathode to transport the oxygen ion to an anode. The anode is coupled to the electrolyte to receive the oxygen ion and produce oxygen gas therewith. In one embodiment, the anode may be fabricated to include an electron-conducting phase having a perovskite crystalline structure or structure similar thereto. This perovskite may have a chemical formula of substantially (Pr(1-x)Lax)(z-y)A'yBO(3-.differential.), wherein 0.ltoreq.x.ltoreq.0.5, 0.ltoreq.y.ltoreq.0.5, and 0.8.ltoreq.z.ltoreq.1.1. In another embodiment, the cathode includes an electron-conducting phase that contains nickel oxide intermixed with magnesium oxide.
Elangovan; Singaravelu (South Jordan, UT), Hartvigsen; Joseph J. (Kaysville, UT)
Ceramatec, Inc. (Salt Lake City, UT)
11/ 781,718
July 23, 2007
GOVERNMENT RIGHTS This invention was made in part with government support under grant number DE-AC07-05ID14517 awarded by the United States Department of Energy. The Government has certain rights in the invention.