Protective interlayer for high temperature solid electrolyte electrochemical cells

Title: Protective interlayer for high temperature solid electrolyte electrochemical cells

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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: Nb.sub.x Ta.sub.y Ce.sub.1-x-y O.sub.2 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), anmore »« less

Inventors:

Singh, Prabhakar ^[1]; Vasilow, Theodore R ^[2]; Richards, Von L ^[3]

Export, PA
Manor, PA
Angola, IN

Issue Date:: 1996-01-01

Research Org.:: Westinghouse Electric Corp., Pittsburgh, PA (United States)

OSTI Identifier:: 870413

Patent Number(s):: 5516597

Assignee:: Westinghouse Electric Corporation (Pittsburgh, PA)

Patent Classifications (CPCs):: Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY

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Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
Y02P70/50 - Manufacturing or production processes characterised by the final manufactured product

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
H01M2008/1293 - {Fuel cells with solid oxide electrolytes}

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
Y02E60/50 - Fuel cells

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
H01M8/0215 - Glass
H01M8/0217 - Complex oxides, optionally doped, of the type AMO3, A being an alkaline earth metal or rare earth metal and M being a metal, e.g. perovskites
H01M2300/0074 - Ion conductive at high temperature

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DOE Contract Number:: AC21-80ET17089

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: protective; interlayer; temperature; solid; electrolyte; electrochemical; cells; comprises; electrically; conducting; doped; admixed; cerium; oxide; composition; niobium; tantalum; devices; characterized; formula; nb; 1-x-y; 05; 02; preferably; method; novel; particularly; applicable; forming; cell; 10; electrode; 12; conductive; 14; deposited; portion; interconnect; 16; 18; discontinuous; 20; porous; selected; consisting; admixtures; air; layer; lanthanum; manganite; dense; yttria; stabilized; zirconium; chromite; fuel; nickel-zirconium; cermet; plurality; shapes; annular; planar; etc; connected; series; parallel; generate; electrical; energy; yttria stabilized; porous layer; oxide composition; niobium oxide; doped cerium; protective interlayer; electrochemical devices; cerium oxide; electrolyte layer; temperature solid; particularly applicable; air electrode; electrochemical cells; electrical energy; electrochemical cell; electrically conductive; solid electrolyte; electrically conducting; zirconium oxide; electrolyte electrochemical; fuel electrode; doped lanthanum; electrochemical device; lanthanum manganite; lanthanum chromite; stabilized zirconium; oxide deposited; novel composition; interconnect layer; generate electric; tantalum oxide; /429/

Citation Formats


                    Singh, Prabhakar, Vasilow, Theodore R, and Richards, Von L. Protective interlayer for high temperature solid electrolyte electrochemical cells.  United States: N. p., 1996. 
        Web.

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                    Singh, Prabhakar, Vasilow, Theodore R, & Richards, Von L. Protective interlayer for high temperature solid electrolyte electrochemical cells.  United States.

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                    Singh, Prabhakar, Vasilow, Theodore R, and Richards, Von L. Mon .  
        "Protective interlayer for high temperature solid electrolyte electrochemical cells".  United States.  https://www.osti.gov/servlets/purl/870413.

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@article{osti_870413,

  title        = {Protective interlayer for high temperature solid electrolyte electrochemical cells},

  author       = {Singh, Prabhakar and Vasilow, Theodore R and Richards, Von L},

  abstractNote = {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: Nb.sub.x Ta.sub.y Ce.sub.1-x-y O.sub.2 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.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1996},

  month        = {1}

}

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