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Title: Interfacial material for solid oxide fuel cell

Abstract

Solid oxide fuel cells having improved low-temperature operation are disclosed. In one embodiment, an interfacial layer of terbia-stabilized zirconia is located between the air electrode and electrolyte of the solid oxide fuel cell. The interfacial layer provides a barrier which controls interaction between the air electrode and electrolyte. The interfacial layer also reduces polarization loss through the reduction of the air electrode/electrolyte interfacial electrical resistance. In another embodiment, the solid oxide fuel cell comprises a scandia-stabilized zirconia electrolyte having high electrical conductivity. The scandia-stabilized zirconia electrolyte may be provided as a very thin layer in order to reduce resistance. The scandia-stabilized electrolyte is preferably used in combination with the terbia-stabilized interfacial layer. The solid oxide fuel cells are operable over wider temperature ranges and wider temperature gradients in comparison with conventional fuel cells.

Inventors:
 [1];  [2];  [3]
  1. Essex Junction, VT
  2. Pittsburgh, PA
  3. Murrysville, PA
Issue Date:
Research Org.:
Westinghouse Electric Corp., Pittsburgh, PA (United States)
OSTI Identifier:
872706
Patent Number(s):
5993989
Assignee:
Siemens Westinghouse Power Corporation (Orlando, FL)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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
DOE Contract Number:  
FC21-91MC28055
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
interfacial; material; solid; oxide; fuel; cell; cells; improved; low-temperature; operation; disclosed; embodiment; layer; terbia-stabilized; zirconia; located; air; electrode; electrolyte; provides; barrier; controls; interaction; reduces; polarization; loss; reduction; electrical; resistance; comprises; scandia-stabilized; conductivity; provided; reduce; preferably; combination; operable; wider; temperature; ranges; gradients; comparison; conventional; temperature ranges; interfacial layer; fuel cell; temperature operation; cell comprises; temperature gradient; air electrode; temperature range; fuel cells; oxide fuel; solid oxide; electrical resistance; electrical conductivity; stabilized zirconia; zirconia electrolyte; layer provides; temperature gradients; conventional fuel; terbia-stabilized zirconia; improved low-temperature; low-temperature operation; /429/427/

Citation Formats

Baozhen, Li, Ruka, Roswell J, and Singhal, Subhash C. Interfacial material for solid oxide fuel cell. United States: N. p., 1999. Web.
Baozhen, Li, Ruka, Roswell J, & Singhal, Subhash C. Interfacial material for solid oxide fuel cell. United States.
Baozhen, Li, Ruka, Roswell J, and Singhal, Subhash C. Fri . "Interfacial material for solid oxide fuel cell". United States. https://www.osti.gov/servlets/purl/872706.
@article{osti_872706,
title = {Interfacial material for solid oxide fuel cell},
author = {Baozhen, Li and Ruka, Roswell J and Singhal, Subhash C},
abstractNote = {Solid oxide fuel cells having improved low-temperature operation are disclosed. In one embodiment, an interfacial layer of terbia-stabilized zirconia is located between the air electrode and electrolyte of the solid oxide fuel cell. The interfacial layer provides a barrier which controls interaction between the air electrode and electrolyte. The interfacial layer also reduces polarization loss through the reduction of the air electrode/electrolyte interfacial electrical resistance. In another embodiment, the solid oxide fuel cell comprises a scandia-stabilized zirconia electrolyte having high electrical conductivity. The scandia-stabilized zirconia electrolyte may be provided as a very thin layer in order to reduce resistance. The scandia-stabilized electrolyte is preferably used in combination with the terbia-stabilized interfacial layer. The solid oxide fuel cells are operable over wider temperature ranges and wider temperature gradients in comparison with conventional fuel cells.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}

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