Lowering the sintering temperature of solid oxide fuel cell electrolytes by infiltration |
| |
| Affiliation: | 1. Izmir Institute of Technology, Department of Mechanical Engineering, Turkey;2. Izmir Institute of Technology, Department of Chemical Engineering, Turkey;3. Gebze Technical University, Department of Materials Science and Engineering, Turkey;4. Gebze Technical University, Institute of Nanotechnology, Turkey;1. Fuel Cell Institute, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia;2. Centre for Materials Engineering and Smart Manufacturing (MERCU), Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia;3. Faculty of Engineering Technology, Universiti Malaysia Perlis (UniMAP), Kampus UniCITI Alam, Sungai Chuchuh, Padang Besar, 02100, Perlis, Malaysia;1. Centre of Mechanical Technology and Automation (TEMA), Department of Mechanical Engineering, University of Aveiro, 3810-193, Aveiro, Portugal;2. Materials Science and Engineering Postgraduate Program, UFPB, 58051-900, João Pessoa, Brazil;3. Materials Science and Engineering Postgraduate Program, UFRN, 59078-970, Natal, Brazil;4. Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV, E.A. 4492), MREI, Université du Littoral Côte d''Opale (ULCO), 59140, Dunkerque, France;5. CICECO – Aveiro Institute of Materials, Department of Materials and Ceramic Engineering, University of Aveiro, 3810-193, Aveiro, Portugal;1. High-Temperature Energy Materials Research Center, Korea Institute of Science and Technology, Seoul 136-791, Republic of Korea;2. Chemical Engineering Department, National Institute of Technology Karnataka, Mangalore 575025, Karnataka, India;1. School of Chemistry and Life Science, Changchun University of Technology, Changchun, 130012, PR China;2. State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, PR China;1. Materials Science and Engineering Postgraduate Program, UFPB, 58051-900 João Pessoa, Brazil;2. Department of Materials and Ceramic Engineering, University of Aveiro, 3810-193 Aveiro, Portugal;3. Department of Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal;4. Energy and Nuclear Research Institute, IPEN, 05508-170 São Paulo, Brazil |
| |
| Abstract: | A dense electrolyte with a relative density of over 95% is vital to prevent gas leakage and thus the achievement of high open circuit voltage in solid oxide fuel cells (SOFCs). The densification process of ceria based electrolyte requires high temperatures heat treatment (i.e. 1400–1500 °C). Thus, the minimum co-sintering temperatures of the anode-electrode bilayers are fixed at these values, resulting in coarse anode microstructures and consequently poor performance. The main purpose of this study is to densify gadolinia doped ceria (GDC), a common SOFC electrolyte, at temperatures lower than 1400 °C. By this aim, an approach involving the infiltration of polymeric precursors into porous electrolyte scaffolds, a method commonly used for composite SOFC electrodes, is proposed. By infiltrating polymeric precursors of GDC into porous GDC scaffolds, a reduction in the sintering temperature by at least 200 °C is achieved with no additives that might affect the electrical properties. Energy dispersive x-ray spectroscopy line scan analyses performed on porous GDC scaffolds infiltrated by a marker solution (polymeric FeOx precursor in this case) reveals a homogeneous infiltrated phase distribution, demonstrating the effectiveness of polymeric precursors. |
| |
| Keywords: | SOFC GDC Electrolyte Microstructure Densification Infiltration |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
