Advances in tubular solid oxide fuel cell technology
- Westinghouse Electric Corp., Pittsburgh, PA (United States)
The design, materials and fabrication processes for the earlier technology Westinghouse tubular geometry cell have been described in detail previously. In that design, the active cell components were deposited in the form of thin layers on a ceramic porous support tube (PST). The tubular design of these cells and the materials used therein have been validated by successful electrical testing for over 65,000 h (>7 years). In these early technology PST cells, the support tube, although sufficiently porous, presented an inherent impedance to air flow toward air electrode. In order to reduce such impedance to air flow, the wall thickness of the PST was first decreased from the original 2 mm (the thick-wall PST) to 1.2 mm (the thin-wall PST). The calcia-stabilized zirconia support tube has now been completely eliminated and replaced by a doped lanthanum manganite tube in state-of-the-art SOFCs. This doped lanthanum manganite tube is extruded and sintered to about 30 to 35 percent porosity, and serves as the air electrode onto which the other cell components are fabricated in thin layer form. These latest technology cells are designated as air electrode supported (AES) cells.
- Research Organization:
- Fuel Cell Seminar Organizing Committee (United States)
- OSTI ID:
- 460156
- Report Number(s):
- CONF-961107-Absts.; ON: TI97001494; TRN: 97:001723-0008
- Resource Relation:
- Conference: Fuel cell seminar, Kissimmee, FL (United States), 17-20 Nov 1996; Other Information: PBD: [1996]; Related Information: Is Part Of Fuel cells seminar; PB: 794 p.
- Country of Publication:
- United States
- Language:
- English
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