Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2005-12-08
2009-12-29
Yuan, Dah-Wei D (Department: 1795)
Metal working
Method of mechanical manufacture
Electrical device making
C429S047000
Reexamination Certificate
active
07637967
ABSTRACT:
The present invention provides for a method of depositing a stepped-gradient fuel electrode onto a fuel cell support2and the resulting fuel cell, that comprises placing a solid oxide fuel cell support that has at least an air electrode layer4and an electrolyte layer6into an atmospheric plasma spraying chamber and measuring spray parameters of an atmospheric plasma spray to obtain reactive oxides, conductive metal and graphite phases. Then spraying the spray parameters onto the solid oxide fuel cell support to produce multiple sub-layers8on the solid oxide fuel cell support, and adjusting a hydrogen usage of the atmospheric plasma spray. The adjusting of the hydrogen usage comprises using high hydrogen levels for the initial spraying of the sub-layers producing a first gradient region, and a lower hydrogen level for subsequent spraying of the sub-layers, producing a second gradient region.
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Zheng R. et al.: “A study of Ni+8YSZ/8YSZ/La0.6Sr0.4CoO3-delta ITSOFC fabricated by atmospheric plasma spraying” Journal of Power Sources, Elsevier, Amserdam, NI, vol. 140, No. 2, pp. 217-225.
R. Zheng, X.M. Zhou, S.R. Wang, T.-L, Wen, C.X. Ding; “A Study of Ni + 8YSZ/8YSZ/La0.6Sr0.4CoO3-δITSOFC fabricated by atmospheric plasma spraying”; Journal of Power Sources, Feb. 2, 2005; pp. 217-225; XP004917729; ISSN: 0378-7753; Elsevier, Amsterdam, NL.
Harter Harold D.
Huang Keqin
Turkal Paul G.
Arciero Adam A
Siemens Energy Inc.
Yuan Dah-Wei D
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