Anode with remarkable stability under conditions of extreme fuel starvation
First Claim
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1. A solid oxide fuel cell (SOFC), comprising:
- a cathode electrode;
a solid oxide electrolyte; and
an anode electrode comprising a first portion comprising a cermet containing a nonzero volume percent of a nickel containing phase and a nonzero volume percent of a ceramic phase comprising doped ceria and a second portion comprising a cermet containing a nonzero volume percent of a nickel containing phase and a nonzero volume percent of a ceramic phase comprising doped ceria, such that the first portion is located between the electrolyte and the second portion;
wherein;
the SOFC is an electrolyte-supported SOFC and the first portion of the anode electrode contains a lower ratio of the nickel containing phase to the ceramic phase than the second portion of the anode electrode;
the first portion of the anode electrode has a thickness of 3 to 30 microns; and
the second portion of the anode electrode has a thickness of 3 to 30 microns.
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Abstract
A solid oxide fuel cell (SOFC) includes a cathode electrode, a solid oxide electrolyte, and an anode electrode having a first portion and a second portion, such that the first portion is located between the electrolyte and the second portion. The anode electrode comprises a cermet comprising a nickel containing phase and a ceramic phase. The first portion of the anode electrode contains a lower porosity and a lower ratio of the nickel containing phase to the ceramic phase than the second portion of the anode electrode.
160 Citations
18 Claims
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1. A solid oxide fuel cell (SOFC), comprising:
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a cathode electrode; a solid oxide electrolyte; and an anode electrode comprising a first portion comprising a cermet containing a nonzero volume percent of a nickel containing phase and a nonzero volume percent of a ceramic phase comprising doped ceria and a second portion comprising a cermet containing a nonzero volume percent of a nickel containing phase and a nonzero volume percent of a ceramic phase comprising doped ceria, such that the first portion is located between the electrolyte and the second portion;
wherein;the SOFC is an electrolyte-supported SOFC and the first portion of the anode electrode contains a lower ratio of the nickel containing phase to the ceramic phase than the second portion of the anode electrode; the first portion of the anode electrode has a thickness of 3 to 30 microns; and the second portion of the anode electrode has a thickness of 3 to 30 microns. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification