Limitation of Thickness Increment of Lanthanum Strontium Cobaltite Cathode Fabricated by Pulsed Laser Deposition

Title
Limitation of Thickness Increment of Lanthanum Strontium Cobaltite Cathode Fabricated by Pulsed Laser Deposition
Authors
노호성이헌지호일이해원이종호손지원
Keywords
SOFC; Thin Film; PLD; LSC
Issue Date
2011-01
Publisher
Journal of the Electrochemical Society
Citation
VOL 158, NO 1, B1-B4
Abstract
The limitation of thickness increment of a lanthanum strontium cobaltite cathode fabricated by pulsed laser deposition was investigated at a thickness range of 0.5–7 ㎛. The cell performance increased monotonically from 477 to 984 mW/㎠ at 0.7 V at 650°C [humidified H2 (3% H2O) fuel and air] as the cathode thickens from 0.5 to 5 ㎛. This was attributed to the increase of the number of the electrode reaction sites along with the thickness of the cathode. However, the beneficial effect of further cathode thickness increment above 5 ㎛ was limited by microstructural problems. Delamination at the electrolyte/cathode interface occurred in cells with cathode thickness of 7 ㎛, leading to an observed drastic drop in cell performance.
URI
http://pubs.kist.re.kr/handle/201004/39232
ISSN
0013-4651
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KIST Publication > Article
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