Our recent study on intermediate temperature-operating solid oxide fuel cells (IT-SOFC) are mainly focused on higher performance of single cell at lower operating temperature. We have started the project to develop a 1 kW-class SOFC system for Residential Power Generation (RPG) application. For a 1 kW-class SOFC stack that can be operated at intermediate temperatures, we have developed anode-supported, planar type SOFC to have advantages for commercialization of SOFCs considering mass production and using cost-effective interconnects such as ferritic stainless steels. Single cells with thin electrolyte layer of YSZ and ScSZ, respectively, were fabricated by slurry coating and their performances were investigated. Mixtures of NiO and 8YSZ powders were pressed into rectangular plates of about 13 × 13 cm2, which were presintered at 1400°C for 1h. Then the 8YSZ (8mol% Y2O3 + ZrO2) or 10ScSZ (10mol% Sc2O3+1mol%CeO2+ZrO2) electrolytes dispersed in distilled water were coated on the upper side of anode substrate and co-fired at 1550 or 1500°C for 1h. Thereafter cathode pastes of La0.78Sr0.22MnO3 or (La0.6Sr0.4)(Co1-xFex)O3 were screen-printed on thin electrolytes and heat-treated at 1100°C for 2 h. The size of anode-supported single cells finally sintered was about 10 × 10 cm2, and the thickness of the electrolyte and the cathode layer was about 20μm and 30μm respectively. The I-V and AC impedance characteristics of these single cells were evaluated at intermediate temperature (650 ∼ 800°C) by using hydrogen gas as a fuel. The maximum power density of anode-supported cells was 0.5 ∼ 2.0 W/cm2 at 750°C and 0.18 ∼ 0.75 W/cm2 at 650°C depending on the composition and microstructure of electrolyte/electrodes.
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ASME 2005 3rd International Conference on Fuel Cell Science, Engineering and Technology
May 23–25, 2005
Ypsilanti, Michigan, USA
Conference Sponsors:
- Nanotechnology Institute
ISBN:
0-7918-3764-5
PROCEEDINGS PAPER
Performance of Anode-Supported SOFC Cells Using Thin Electrolyte of Scandia-Doped Zirconia at Intermediate Temperatures Available to Purchase
Young-Sung Yoo,
Young-Sung Yoo
Korea Electric Power Research Institute, Daejeon, Korea
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Jae Keun Park,
Jae Keun Park
Korea Electric Power Research Institute, Daejeon, Korea
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Soo-Yong Yang,
Soo-Yong Yang
Korea Electric Power Research Institute, Daejeon, Korea
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Je-Myung Oh,
Je-Myung Oh
Korea Electric Power Research Institute, Daejeon, Korea
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Joongmyeon Bae
Joongmyeon Bae
Korea Advanced Institute of Science and Technology, Daejeon, Korea
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Young-Sung Yoo
Korea Electric Power Research Institute, Daejeon, Korea
Jae Keun Park
Korea Electric Power Research Institute, Daejeon, Korea
Soo-Yong Yang
Korea Electric Power Research Institute, Daejeon, Korea
Je-Myung Oh
Korea Electric Power Research Institute, Daejeon, Korea
Joongmyeon Bae
Korea Advanced Institute of Science and Technology, Daejeon, Korea
Paper No:
FUELCELL2005-74146, pp. 305-309; 5 pages
Published Online:
October 13, 2008
Citation
Yoo, Y, Park, JK, Yang, S, Oh, J, & Bae, J. "Performance of Anode-Supported SOFC Cells Using Thin Electrolyte of Scandia-Doped Zirconia at Intermediate Temperatures." Proceedings of the ASME 2005 3rd International Conference on Fuel Cell Science, Engineering and Technology. 3rd International Conference on Fuel Cell Science, Engineering and Technology. Ypsilanti, Michigan, USA. May 23–25, 2005. pp. 305-309. ASME. https://doi.org/10.1115/FUELCELL2005-74146
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