Title:
【発明の名称】高温固体電解質電気化学的電池のための保護中間層
Document Type and Number:
Japanese Patent JPH10508719
Kind Code:
A
Abstract:
The invention comprises of an electrically conducting doped or admixed cerium oxide composition with niobium oxide and/or tantalum oxide for electrochemical devices, characterized by the general formula: NbxTayCe1-x-yO2 where x is about 0.0 to 0.05, y is about 0.0 to 0.05, and x+y is about 0.02 to 0.05, and where x is preferably about 0.02 to 0.05 and y is 0, and a method of making the same. This novel composition is particularly applicable in forming a protective interlayer of a high temperature, solid electrolyte electrochemical cell (10), characterized by a first electrode (12); an electrically conductive interlayer (14) of niobium and/or tantalum doped cerium oxide deposited over at least a first portion (R) of the first electrode; an interconnect (16) deposited over the interlayer; a solid electrolyte (18) deposited over a second portion of the first electrode, the first portion being discontinuous from the second portion; and, a second electrode (20) deposited over the solid electrolyte. The interlayer (14) is characterized as being porous and selected from the group consisting of niobium doped cerium oxide, tantalum doped cerium oxide, and niobium and tantalum doped cerium oxide or admixtures of the same. The first electrode (12), an air electrode, is a porous layer of doped lanthanum manganite, the solid electrolyte layer (18) is a dense yttria stabilized zirconium oxide, the interconnect layer (16) is a dense, doped lanthanum chromite, and the second electrode (20), a fuel electrode, is a porous layer of nickel-zirconium oxide cermet. The electrochemical cell (10) can take on a plurality of shapes such as annular, planar, etc. and can be connected to a plurality of electrochemical cells in series and/or in parallel to generate electrical energy.
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Inventors:
Shin, Prabhaker
Richard, Fon, Elle
Bashiro, Theodore, Earl
Richard, Fon, Elle
Bashiro, Theodore, Earl
Application Number:
JP51541396A
Publication Date:
August 25, 1998
Filing Date:
October 31, 1995
Export Citation:
Assignee:
Westinghouse Electric Corporation
International Classes:
H01M8/02; H01M8/12; (IPC1-7): H01M8/02; H01M8/02; H01M8/12
Attorney, Agent or Firm:
Koichiro Kato (2 outside)