Novel Design of Microchanneled Tubular Solid Oxide Fuel Cells and Synthesis Using a Multipass Extrusion Process |
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| Authors: | Byong-Taek Lee A H M Esfakur Rahman Jong-Hee Kim |
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| Affiliation: | Department of Biomedical Engineering and Materials, School of Medicine, Soonchunhyang University, 366-1 Ssyang young-dong, Cheonan City, Chungnam 330-090, South Korea; School of Advanced Materials Engineering, Kongju National University, Shinkwan-dong, Kongju City, Chungnam 314-701, South Korea; Stainless Steel Research Group, Technical Research Laboratories, POSCO, Pohang 790-785, South Korea |
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| Abstract: | A novel, microchanneled tubular solid oxide fuel cell was fabricated using a multipass extrusion process, with an outside diameter of 2.7 mm that contained 61 cells. Cell materials used in this work were 8 mol% yttria-stabilized zirconia (8YSZ), La0.8Sr0.2MnO3 (LSM), and NiO–8YSZ (50:50 vol%) as electrolyte, cathode, and anode, respectively. Three stages of heat-treatment processes were applied, at 700°C in N2 condition, at 1000°C in air, and then sintered at 1300°C for 2 h, respectively. The X-ray diffraction analysis confirmed that no reaction phases appeared after sintering. The microstructures of anode and cathode were fairly porous while the electrolyte had a dense microstructure (relative density >96%). The thickness of electrolyte, anode, and cathode were 20, 30, and 40 μm, respectively, and the diameter of the continuous channels was 150 μm. |
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