Thermo-mechanical stability of multi-scale-architectured thin-film-based solid oxide fuel cells assessed by thermal cycling tests

Title
Thermo-mechanical stability of multi-scale-architectured thin-film-based solid oxide fuel cells assessed by thermal cycling tests
Authors
노호성윤경중김병국제해준이해원이종호손지원
Keywords
Solid oxide fuel cell; Thin-film electrolyte; Nanostructured electrode; Multi-scale architecture; Thermal cycle
Issue Date
2014-03
Publisher
Journal of power sources
Citation
VOL 249, 125-130
Abstract
The thermo-mechanical stability of a thin-film and nanostructure-based SOFC (TF-SOFC) is assessed by thermal cycling tests. An ultrathin bi-layer electrolyte composed of 150-nm-thick yttria-stabilized zirconia (YSZ) and 450-nm-thick gadolinia-doped ceria (GDC) is successfully built on a NiO-YSZ anode support the microstructure scale of which changes from μm to nm (multi-scale architecture). The concept of multi-scale architecture in the TF-SOFC not only enables the reliable implementation of thin-film electrolytes and nanostructured electrodes to improve the critical low-temperature performance of the SOFC but also secures the thermo-mechanical stability of TF-SOFC. Competent cell performance is obtained, including a peak power density about 1.4 W cm−2 at 600 °C. The TF-SOFC survives 50 thermal cycle tests between 600 and 400 °C over 124 h without suffering a drastic failure. Although some cell output degradation is observed after the thermal cycling tests, the cell sustains a peak power density over 1 W cm−2 at 600 °C, which indicates the superior thermo-mechanical stability of the multi-scale-architectured TF-SOFC.
URI
http://pubs.kist.re.kr/handle/201004/47062
ISSN
03787753
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KIST Publication > Article
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