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US 7,887,971 B2Granted
SORFC system with non-noble metal electrode compositions
AssigneeBloom Energy Corporation
InventorsDarren Hickey, Ian Russell
Life of this patent
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Abstract
A solid oxide regenerative fuel cell includes a ceramic electrolyte, a first electrode which is adapted to be positively biased when the fuel cell operates in a fuel cell mode and in an electrolysis mode, and a second electrode which is adapted to be negatively biased when the fuel cell operates in the fuel cell mode and in the electrolysis mode. The second electrode comprises less than 1 mg/cm2 of noble metal.
Claims10
A solid oxide regenerative fuel cell, comprising:
- a ceramic electrolyte;
- a first electrode which is adapted to be positively biased when the fuel cell operates in a fuel cell mode and in an electrolysis mode;
- a second electrode which is adapted to be negatively biased when the fuel cell operates in the fuel cell mode and in the electrolysis mode;
- and
- a first device which is adapted to provide a reducing atmosphere to the second electrode when the fuel cell operates in the electrolysis mode to prevent the second electrode from oxidizing;
- wherein:
- the second electrode comprises less than 0.1 mg/cm2 of noble metal and less than 1 weight percent of noble metal;
- and
- the second electrode comprises at least one of Ni, Cu, Fe or a combination thereof with an ionic conducting phase.
6 more elements
Dependencies are inferred from the claim text.