Fabrication and electrochemical performance of thin-film solid oxide fuel cells with large area nanostructured membranes
Thin-film solid oxide fuel cells (SOFCs) with large (5-mm square) membranes and ultra-thin La 0.6Sr 0.4Co 0.8Fe 0.2O 3− δ (LSCF) cathodes have been fabricated and their electrochemical performance was measured up to 500 °C. A grid of plated nickel on the cathode with 5–10 μm linewidth and 25–50 μm p...
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Published in | Journal of power sources Vol. 195; no. 4; pp. 1149 - 1155 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Amsterdam
Elsevier B.V
15.02.2010
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | Thin-film solid oxide fuel cells (SOFCs) with large (5-mm square) membranes and ultra-thin La
0.6Sr
0.4Co
0.8Fe
0.2O
3−
δ
(LSCF) cathodes have been fabricated and their electrochemical performance was measured up to 500
°C. A grid of plated nickel on the cathode with 5–10
μm linewidth and 25–50
μm pitch successfully supported a roughly 200-nm-thick LSCF/yttria-stabilized zirconia/platinum membrane while covering less than 20% of the membrane area. This geometry yielded a maximum performance of 1
mW
cm
−2 and 200
mV open-circuit voltage at 500
°C. Another approach toward realizing large area fuel cell junctions consists of depositing the membrane on a smooth substrate, covering it with a high-porosity material formed
in situ, then removing the substrate. We have used a composite of silica aerogel and carbon fiber as the support, and show that this material can be created in flow channels etched into the underside of a silicon chip bonded to the top of the SOFC membrane. We anticipate these integrated fuel cell devices and structures to be of relevance to advancing low-temperature SOFCs for portable applications. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2 ObjectType-Feature-1 |
ISSN: | 0378-7753 1873-2755 |
DOI: | 10.1016/j.jpowsour.2009.08.066 |