Method and apparatus for forming electrode interconnect contacts for a solid-oxide fuel cell stack
An electrical interconnect for a solid-oxide fuel cell stack assembly, including a novel sintering paste and an improved manufacturing process for an anode and cathode electrical contacts is disclosed. On the anode side, the paste contains a metallic oxide such as NiO, and an amount of sacrificial pore-forming particles, such as carbon particles or polymer spheres, which are vaporized during sintering of the paste, resulting in a very porous connection having good electrical conductivity and good adhesion. A preferred level of pore-former in the paste is about 40 volume percent. On the cathode side, the paste contains a noble metal such as for example, gold, platinum, palladium or rhodium, and an amount of the sacrificial pore-forming particles. The paste may be applied to the surfaces in a grid pattern or, because the resulting contact is porous after sintering, it may be applied as a continuous layer.
- Research Organization:
- Delphi Technologies, Inc., Troy, MI (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FC26-02NT41246
- Assignee:
- Delphi Technologies, Inc. (Troy, MI)
- Patent Number(s):
- 7,781,123
- Application Number:
- 11/145,647
- OSTI ID:
- 1531648
- Resource Relation:
- Patent File Date: 2005-06-06
- Country of Publication:
- United States
- Language:
- English
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