Improvement of the internal reforming of metal-supported SOFC at low temperatures |
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| Affiliation: | 1. EV System Laboratory, Nissan Research Center, Nissan Motors Company, Ltd, 1 Natsushima-cho, Yokosuka-shi, Kanagawa, 237-8523, Japan;2. Next-Generation Fuel Cell Research Center (NEXT-FC), Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan;1. Laboratory of Electrochemical Devices Based on Solid Oxide Proton Electrolytes, Institute of High Temperature Electrochemistry, Ekaterinburg 620066, Russia;2. Hydrogen Energy Laboratory, Ural Federal University, Ekaterinburg 620002, Russia;1. Institute of High Temperature Electrochemistry of the Ural Branch of the Russian Academy of Sciences, Russia;2. Ural Federal University, Institute of Hydrogen Energy, Russia;1. Laboratory of Electrochemical Devices Based on Solid Oxide Proton Electrolytes, Institute of High Temperature Electrochemistry, Ekaterinburg 620137, Russia;2. Hydrogen Energy Laboratory, Ural Federal University, Ekaterinburg 620002, Russia;3. Laboratory of Photoactive Nanocomposite Materials, Saint Petersburg State University, St. Petersburg 198504, Russia;1. Institute of High-Temperature Electrochemistry, 20 Akademicheskaya St., 620066 Ekaterinburg, Russia;2. Ural Federal University, 19 Mira St., 620002 Ekaterinburg, Russia;1. School of Transportation and Vehicle Engineering, Shandong University of Technology, Zibo, 255000, China;2. State Key Laboratory of Engines, Tianjin University, Tianjin, 3000072, China |
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| Abstract: | Automotive Solid oxide fuel cells (SOFCs) require improvements in mechanical robustness, power generation at low temperatures, and system compactness. To address these issues, we attempt to improve the internal reformation of metal-supported SOFCs (MS-SOFCs) via catalyst infiltration. After introducing nickel/gadolinium-doped ceria (Ni/GDC) nanoparticles, power densities of 1.16 Wcm−2 with hydrogen (3%H2O) and 0.85 Wcm−2 with methane (Steam-to-Carbon ratio, S/C = 1.0) are obtained at 600 °C, 0.7 V. This is the highest performance achieved in previous studies on MS-SOFCs. Internal reforming with various hydrocarbon is also demonstrated. In particular 0.64 Wcm−2 at 600 °C, 0.7 V is obtained when the fuel is iso-octane. We develop a numerical model to separately analyze reforming and electrochemical reaction. Catalyst infiltration dramatically increases the number of active sites for steam reforming. In addition, ruthenium/gadolinium-doped ceria (Ru/GDC) should be suitable as a catalyst metal at low temperatures because of the lower activation energy of steam reforming. |
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| Keywords: | Metal-supported SOFC Internal methane reforming Catalyst infiltration Iso-octane |
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