Thermo-mechanical stability of multi-scale-architectured thin-film-based solid oxide fuel cells assessed by thermal cycling tests
- Thermo-mechanical stability of multi-scale-architectured thin-film-based solid oxide fuel cells assessed by thermal cycling tests
- 노호성; 윤경중; 김병국; 제해준; 이해원; 이종호; 손지원
- Solid oxide fuel cell; Thin-film electrolyte; Nanostructured electrode; Multi-scale architecture; Thermal cycle
- Issue Date
- Journal of power sources
- VOL 249, 125-130
- 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.
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