Multilayer tape casting of large-scale anode-supported thin-film electrolyte solid oxide fuel cells |
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| Affiliation: | 1. Department of Mechanical and Aerospace Engineering, Seoul National University, 1, Gwanak-ro, Gwanak-gu, Seoul, 08826, South Korea;2. Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, 1206 West Green Street, Urbana, IL, 61801, USA;3. Institute of Advanced Machines and Design, Seoul National University, 1, Gwanak-ro, Gwanak-gu, Seoul, 08826, South Korea;1. CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, PR China;2. Shanghai Institute of Ceramics, Chinese Academy of Sciences (SICCAS), 1295 Dingxi Road, Shanghai 200050, PR China;1. School of Mechanical and Aerospace Engineering, Seoul National University, San 56-1, Daehak-dong, Gwanak-gu, Seoul 151-742, Republic of Korea;2. Department of Intelligent Convergence Systems, Seoul National University, San 56-1, Daehak-dong, Gwanak-gu, Seoul 151-742, Republic of Korea;3. School of Mechanical Engineering, Sungkyunkwan University, 300 Cheoncheon-dong, Jangan-gu, Suwon 440-746, Republic of Korea |
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| Abstract: | Tape casting is conventionally used to prepare individual, relatively thick components (i.e., the anode or electrolyte supporting layer) for solid oxide fuel cells (SOFCs). In this research, a multilayer ceramic structure is prepared by sequentially tape casting ceramic slurries of different compositions onto a Mylar carrier followed by co-sintering at 1400 °C. The resulting half-cells contains a 300 μm thick NiO–yttria-stabilized zirconia (YSZ) anode support, a 20 μm NiO–YSZ anode functional layer, and an 8 μm YSZ electrolyte membrane. Complete SOFCs are obtained after applying a Gd0.1Ce0.9O2 (GDC) barrier layer and a Sm0.5Sr0.5CoO3 (SSC) -GDC cathode by using a wet-slurry spray method. The 50 mm × 50 mm SOFCs produce peak power densities of 337, 554, 772, and 923 mW/cm2 at 600, 650, 700, and 750 °C, respectively, on hydrogen fuel. A short stack including four 100 mm × 150 mm cells is assembled and tested. Each stack repeat unit (one cell and one interconnect) generates around 28.5 W of electrical power at a 300 mA/cm2 current density and 700 °C. |
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| Keywords: | Solid oxide fuel cells Thin film electrolyte Large size Tape casting Co-sintering |
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