Solid oxide fuel cells, and air electrode and electrical interconnection materials therefor

Patent · Wed Jan 01 00:00:00 EST 1992

OSTI ID:868452

Bates, J Lambert ^[1]

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1. Richland, WA

In one aspect of the invention, an air electrode material for a solid oxide fuel cell comprises Y.sub.1-a Q.sub.a MnO.sub.3, where "Q" is selected from the group consisting of Ca and Sr or mixtures thereof and "a" is from 0.1 to 0.8. Preferably, "a" is from 0.4 to 0.7. In another aspect of the invention, an electrical interconnection material for a solid oxide fuel cell comprises Y.sub.1-b Ca.sub.b Cr.sub.1-c Al.sub.c O.sub.3, where "b" is from 0.1 to 0.6 and "c" is from 0 to 9.3. Preferably, "b" is from 0.3 to 0.5 and "c" is from 0.05 to 0.1. A composite solid oxide electrochemical fuel cell incorporating these materials comprises: a solid oxide air electrode and an adjacent solid oxide electrical interconnection which commonly include the cation Y, the air electrode comprising Y.sub.1-a Q.sub.a MnO.sub.3, where "Q" is selected from the group consisting of Ca and Sr or mixtures thereof and "a" is from 0.1 to 0.8, the electrical interconnection comprising Y.sub.1-b Ca.sub.b Cr.sub.1-c Al.sub.c O.sub.3, where "b" is from 0.1 to 0.6 and "c" is from 0.0 to 0.3; a yttrium stabilized solid electrolyte comprising (1-d)ZrO.sub.2 -(d)Y.sub.2 O.sub.3 where "d" is from 0.06 to 0.5; and a solid fuel electrode comprising X-ZrO.sub.2, where "X" is an elemental metal.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• DOE Contract Number: AC06-76RL01830
• Assignee: Battelle Memorial Institute (Richland, WA)
• Patent Number(s): US 5143801
• OSTI ID: 868452
• Country of Publication: United States
• Language: English

Related Subjects

solid
oxide
fuel
cells
air
electrode
electrical
interconnection
materials
aspect
material
cell
comprises
1-a
mno
selected
consisting
sr
mixtures
preferably
1-b
1-c
05
composite
electrochemical
incorporating
adjacent
commonly
cation
comprising
yttrium
stabilized
electrolyte
1-d
zro
06
x-zro
elemental
metal
electrochemical fuel
cell incorporating
fuel cell
electrolyte comprising
electrical interconnection
solid fuel
oxide electrochemical
cell comprises
air electrode
fuel cells
solid electrolyte
oxide fuel
solid oxide
electrode material
fuel electrode
interconnection material
electrode comprising
elemental metal
materials comprises
composite solid
materials comprise
oxide electric
chemical fuel
interconnection materials
electrical interconnect
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