Degradation of solid oxide fuel cell cathodes accelerated at a high water vapor concentration

Title
Degradation of solid oxide fuel cell cathodes accelerated at a high water vapor concentration
Authors
김선혜심광보김창삼J.T. ChouT. OshimaK. ItoK. Sasaki
Keywords
SOFC; cathode; humidity; degradation
Issue Date
2010-04
Publisher
Journal of Fuel Cell Science and Technology
Citation
VOL 7, NO 4, 021011-1-021011-6
Abstract
The influence of water vapor in air on power generation characteristic of solid oxide fuel cells was analyzed by measuring cell voltage at a constant current density, as a function of water vapor concentration at 800°C and 1000°C. Cell voltage change was negligible at 1000°C, while considerable voltage drop was observed at 800°C accelerated at high water vapor concentrations of 20 wt % and 40 wt %. It is considered that La2O3 formed on the (La0.8Sr0.2)0.98MnO3 surface, which is assumed to be the reason for a large voltage drop.
URI
http://pubs.kist.re.kr/handle/201004/37278
ISSN
1550-624X
Appears in Collections:
KIST Publication > Article
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