Ni1?xCux alloy-based anodes for low-temperature solid oxide fuel cells with biomass-produced gas as fuel |
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| Affiliation: | 1. Laboratory for Biomass Clean Energy, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China;2. Department of Chemical Engineering, Monash University, Clayton, Vic. 3800, Australia;1. The Earth and Mineral Sciences Energy Institute, The Pennsylvania State University, University Park, PA 16802, USA;2. Department of Energy and Mineral Engineering, The Pennsylvania State University, University Park, PA 16802, USA;3. Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA;4. National Energy Technology Laboratory, U.S. Department of Energy, Morgantown, WV, 26507, USA;1. Energy Research Institute at NTU (ERIAN), Nanyang Technological University, Singapore, 639798, Singapore;2. School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, 639798, Singapore;3. Building Energy Research Group, Department of Building and Real Estate, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong;4. Consultancy Service Division, Automotive Data Center, China Automotive Technology & Research Center, Tianjin, 300300, China;1. Faculty of Engineering, Kyushu University, Japan;2. International Research Center for Hydrogen Energy, Japan;3. Next-Generation Fuel Cell Research Center (NEXT-FC), Japan;4. International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Nishi-ku, Fukuoka, Japan;5. Department of Mechanical Engineering, University of Sheffield, UK;1. Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China;2. School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, GA 30332-0245, USA |
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| Abstract: | Ni–Cu alloy-based anodes, Ni1?xCux (x = 0, 0.05, 0.2, 0.3)–Ce0.8Sm0.2O1.9 (SDC), were developed for direct utilization of biomass-produced gas in low-temperature solid oxide fuel cells (LT-SOFCs) with thin film Ce0.9Gd0.1O1.95 electrolytes. The alloys were formed by in situ reduction of Ni1?xCuxOy composites synthesized using a glycine-nitrate technique. The electrolyte films were fabricated with a co-pressing and co-firing technique. Electrochemical performance of the Ni1?xCux–SDC anode supported cells was investigated at 600 °C when humidified (3% H2O) biomass-produced gas (BPG) was used as the fuel and stationary air as the oxidant. With Ni–Cu alloys as anodes, carbon deposition was substantially suppressed and electrochemical performance of the cells was sustained for much longer periods of time. For example, the power export of a Ni–SDC supported cell was only 50% of the initial value (200 mW cm?2 at 0.5 V) after 20 min, while Ni0.8Cu0.2–SDC supported cells could maintain 90% of the initial power density (250 mW cm?2 at 0.5 V) over a period of 10 h. The improved performance of the Ni–Cu alloy-based anodes is worth considering in developing SOFCs fueled directly with dilute hydrocarbons such as gases derived from biomass. |
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