Method of forming a plasma sprayed interconnection layer on an electrode of an electrochemical cell

Patent · Sat Dec 31 23:00:00 EST 1994

OSTI ID:869936

Spengler, Charles J ^[1]; Folser, George R ^[2]; Vora, Shailesh D ^[3]; Kuo, Lewis ^[3]; Richards, Von L ^[4]

---

1. Murrysville, PA
2. Lower Burrell, PA
3. Monroeville, PA
4. Anyola, IN

A dense, substantially gas-tight, electrically conductive interconnection layer is formed on an air electrode structure of an electrochemical cell by (A) providing an electrode surface; (B) forming on a selected portion of the electrode surface, a layer of doped LaCrO.sub.3 particles doped with an element selected from Ca, Sr, Ba, Mg, Co, Ni, Al and mixtures thereof by plasma spraying doped LaCrO.sub.3 powder, preferably compensated with chromium as Cr.sub.2 O.sub.3 and/or dopant element, preferably by plasma arc spraying; and, (C) heating the doped and compensated LaCrO.sub.3 layer to about 1100.degree. C. to 1300.degree. C. to provide a dense, substantially gas-tight, substantially hydration-free, electrically conductive interconnection material bonded to the electrode surface. A solid electrolyte layer can be applied to the unselected portion of the air electrode, and a fuel electrode can be applied to the solid electrolyte, to provide an electrochemical cell.

• Research Organization: Westinghouse Electric Corporation (Pittsburgh, PA)
• DOE Contract Number: FC21-91MC28055
• Assignee: Westinghouse Electric Corporation (Pittsburgh, PA)
• Patent Number(s): US 5426003
• OSTI ID: 869936
• Country of Publication: United States
• Language: English

Related Subjects

/429/29/427/
1100
1300
air
air electrode
applied
bonded
cell
chromium
compensated
conductive
conductive interconnect
conductive interconnection
degree
dense
dopant
dopant element
doped
doped lacro
electrically
electrically conductive
electrochemical
electrochemical cell
electrode
electrode structure
electrode surface
electrolyte
electrolyte layer
element
element selected
formed
forming
fuel
fuel electrode
gas-tight
heating
hydration-free
interconnection
interconnection layer
interconnection material
lacro
layer
material
material bonded
method
mg
mixtures
particles
plasma
plasma spray
plasma sprayed
plasma spraying
portion
powder
preferably
provide
providing
selected
selected portion
solid
solid electrolyte
sprayed
sprayed interconnection
spraying
sr
structure
substantially
substantially gas-tight
surface
unselected