Abstract
Stacks are made of conventional single cells with configuration of Ni-YSZ/YSZ/LSM-YSZ. Thermal cycling, degradation and power density are investigated. A cell stack unit showed a degradation rate of less than 1%/per cycle and maintained 1.15 volt of OCV after going through 1350 hours and 46 thermal cycles under 0.1A/cm2 and 750°. The OCV of two-cell stack was above 2.2V after 400 hours operation time and 15 thermal cycles under 0.1Acm-2. The degradation of two cell stack was also lower than 1% per cycle. A five cell stack has been tested for more than 3000 hours in which the individual stack unit is monitored. Our 10 cell stack reached 310W with 0.31W/cm2 in power density. The single cell could reach 50 W power in the current stack design which corresponds to our results from single cell test with active area of 4×4cm2. A stack of 550W was built and tested.
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