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Title: Interfacial material for solid oxide fuel cell

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.
 [1] ;  [2] ;  [3]
  1. (Essex Junction, VT)
  2. (Pittsburgh, PA)
  3. (Murrysville, PA)
Publication Date:
OSTI Identifier:
Report Number(s):
US 5993989
DOE Contract Number:
Resource Type:
Research Org:
Westinghouse Electric Corporation (Pittsburgh, PA)
Country of Publication:
United States
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