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

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 C to 1300 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. 6 figs.
Inventors:
; ; ; ;
Issue Date:
OSTI Identifier:
87717
Assignee:
Westinghouse Electric Corp., Pittsburgh, PA (United States) PTO; SCA: 300503; 360201; PA: EDB-95:117524; SN: 95001431120
Patent Number(s):
US 5,426,003/A/
Application Number:
PAN: 8-195,774
Contract Number:
FC21-91MC28055
Resource Relation:
Other Information: PBD: 20 Jun 1995
Research Org:
Westinghouse Electric Corporation
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; 36 MATERIALS SCIENCE; FUEL CELLS; ELECTRODES; SPRAYED COATINGS; LANTHANUM OXIDES; PLASMA ARC SPRAYING; HEAT TREATMENTS; CHROMIUM OXIDES; DOPED MATERIALS; ELECTRIC CONTACTS