Spray pyrolysis of electrolyte interlayers for vacuum plasma-sprayed SOFC |
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| Institution: | 1. BMW Group, Future Powertrain Technology Projects, 80788 Munich, Germany;2. Institute of Nonmetallic Inorganic Materials, Department of Materials, Swiss Federal Institute of Technology, ETH Zurich, Wolfgang-Pauli-Str. 10, 8093 Zurich, Switzerland;1. Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan 430074, PR China;2. Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, PR China;1. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, People’s Republic of China;2. School of Materials Science and Energy Engineering, Foshan University, Foshan 528000, People’s Republic of China;1. Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, Taipei 10608, Taiwan;2. Institute of Materials Science and Engineering, National Taipei University of Technology, Taipei 10608, Taiwan;3. Department of Chemical and Materials Engineering, Chinese Culture University, Taipei 11114, Taiwan;4. Department of Inorganic Non-metallic Materials, University of Science and Technology Beijing, 100083 Beijing, China;1. College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, Guangdong, PR China;2. Faculty of Materials Science and Chemistry, China University of Geosciences (Wuhan), Wuhan 430074, PR China;3. Center for Condensed Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001, PR China;4. Department of Aeronautical & Automotive Engineering, Loughborough University, Loughborough LE113TU, United Kingdom |
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| Abstract: | The effects of gadolinia-doped ceria (CGO, Ce0.8Gd0.2O1.9−x) and yttria-doped zirconia (8YSZ, Zr0.92Y0.08O2−x) interlayers prepared by spray pyrolysis between vacuum plasma-sprayed 8YSZ electrolytes (8YSZ–VPS) and screen-printed (La0.8Sr0.2)0.98MnO3 cathodes (LSM) on the power output of solid oxide fuel cells (SOFC) are investigated. Amorphous thin films are deposited and then converted to nanocrystalline electrolyte–cathode interlayers during the first heat-up cycle of a SOFC to the operating temperature. CGO thin films between the YSZ plasma-sprayed electrolyte and the LSM cathode increased the power output by more than 20% compared to cells without interlayers, whereas YSZ films degraded the power output of cells. It is assumed that CGO improves the charge transfer at the electrolyte–cathode interface and that the CGO layer prevents the formation of undesirable insulation of La-zirconate at the interface 8YSZ/LSM. |
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