Method of doping interconnections for electrochemical cells

Patent · Mon Jan 01 00:00:00 EST 1990

OSTI ID:867249

Pal, Uday B ^[1]; Singhal, Subhash C ^[2]; Moon, David M ^[3]; Folser, George R ^[4]

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1. Monroeville, PA
2. Murrysville, PA
3. Pittsburgh, PA
4. Lower Burrell, PA

A dense, electronically conductive interconnection layer 26 is bonded on a porous, tubular, electronically conductive air electrode structure 16, optionally supported by a ceramic support 22, by (A) forming a layer of oxide particles of at least one of the metals Ca, Sr, Co, Ba or Mg on a part 24 of a first surface of the air electrode 16, (B) heating the electrode structure, (C) applying a halide vapor containing at least lanthanum halide and chromium halide to the first surface and applying a source of oxygen to a second opposite surface of the air electrode so that they contact at said first surface, to cause a reaction of the oxygen and halide and cause a dense lanthanum-chromium oxide structure to grow, from the first electrode surface, between and around the oxide particles, where the metal oxide particles get incoporated into the lanthanum-chromium oxide structure as it grows thicker with time, and the metal ions in the oxide particles diffuse into the bulk of the lanthamum-chromium oxide structure, to provide a dense, top, interconnection layer 26 on top of the air electrode 16. A solid electrolyte layer 18 can be applied to the uncovered portion of the air electrode, and a fuel electrode 20 can be applied to the solid electrolyte, to provide an electrochemical cell 10.

• Research Organization: Westinghouse Electric Corp., Pittsburgh, PA (United States)
• DOE Contract Number: AC02-80ET17089
• Assignee: Westinghouse Electric Corp. (Pittsburgh, PA)
• Patent Number(s): US 4895576
• OSTI ID: 867249
• Country of Publication: United States
• Language: English

Related Subjects

method
doping
interconnections
electrochemical
cells
dense
electronically
conductive
interconnection
layer
26
bonded
porous
tubular
air
electrode
structure
16
optionally
supported
ceramic
support
22
forming
oxide
particles
metals
sr
mg
24
surface
heating
applying
halide
vapor
containing
lanthanum
chromium
source
oxygen
opposite
contact
reaction
lanthanum-chromium
grow
metal
incoporated
grows
thicker
time
diffuse
bulk
lanthamum-chromium
provide
top
solid
electrolyte
18
applied
uncovered
portion
fuel
20
cell
10
halide vapor
vapor containing
interconnection layer
electrolyte layer
ceramic support
electrode structure
air electrode
electrochemical cells
metal oxide
electrochemical cell
solid electrolyte
oxide particles
electronically conductive
fuel electrode
electrode surface
chromium oxide
conductive interconnection
opposite surface
uncovered portion
optionally supported
oxide particle
site surface
conductive interconnect
conductive air
/29/427/429/