Comparison of electrolyte fabrication techniques on the performance of anode supported solid oxide fuel cells |
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| Affiliation: | 1. Nigde Omer Halisdemir University, Mechanical Engineering Department, 51245, Nigde, Turkey;2. Nigde Omer Halisdemir University Prof. Dr. T. Nejat Veziroglu Clean Energy Research Center, 51245, Nigde, Turkey;3. Vestel Defense Industry, Universiteler Mah. Ihsan Dogramaci Bul, Titanyum Blok 17/B Teknokent ODTU, 06800, Ankara, Turkey;1. Nigde Omer Halisdemir University, Mechanical Engineering Department, 51245, Nigde, Turkey;2. Nigde Omer Halisdemir University Prof. Dr. T. Nejat Veziroglu Clean Energy Research Center, 51245, Nigde, Turkey;1. Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu City 300, Taiwan, ROC;2. Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, Taipei City 106, Taiwan, ROC;1. College of Materials Science and Engineering, Nanjing Tech University, No. 5 Xinmofan Road, Nanjing, Jiangsu 210009, PR China;2. Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, No. 5 Xinmofan Road, Nanjing, Jiangsu 210009, PR China;1. Institute of Solid State Physics RAS, 2 ul. Acad. Osipyana, Chernogolovka, Moscow District, 142432, Russia;2. Moscow Institute of Physics and Technology, 9 Institutskiy per., Dolgoprudny, Moscow District, 141701, Russia;3. NEVZ-Ceramics, JSC, 220 Krasniy prosp., Novosibirsk, 630049, Russia;4. Institute of High Current Electronics SB RAS, Academicheskii prosp. 2/3, Tomsk 634055, Russia;1. Ni?de Omer Halisdemir University, Prof. Dr. T. Nejat Veziroglu Clean Energy Research Center, 51245, Nigde, Turkey;2. Ni?de Omer Halisdemir University, Mechanical Engineering Department, 51245, Nigde, Turkey;1. School of Mechanical Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, South Korea;2. School of Electrical Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, South Korea |
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| Abstract: | A comparison of three solid oxide electrolyte fabrication processes, namely dip coating, screen printing and tape casting, for planar anode supported solid oxide fuel cells (SOFCs) is presented in this study. The effect of sintering temperature (1325–1400 °C) is also examined. The anode and cathode layers of the anode-supported cells, on the other hand, are fabricated by tape casting and screen printing, respectively. The quality of the electrolytes is evaluated via performance measurements, impedance analyses and microstructural investigations of the cells. It is found that the density of the electrolyte increases with the sintering temperatures for all fabrication methods studied. The results also show that with the process and fabrication parameters considered in this study, both dip coating and screen printing do not yield a desired dense electrolyte structure as proven by open circuit potentials measured and SEM photos. The cells with tape cast electrolytes, on the other hand, provide the highest performances regardless of the electrolyte sintering and cell operating temperatures. The best peak performance of 0.924 W/cm2 is obtained from the cell with tape cast electrolyte sintered at 1400 °C. SEM investigations and measured open circuit potentials reveal that almost fully dense electrolyte layer can be obtained with a tape cast electrolyte particularly sintered at temperatures higher than 1350 °C. Impedance analyses indicate that the main reason behind the significantly higher performances is due to not only increased electrolyte density but a decrease in the interface resistance of the anode functional and electrolyte layer is also responsible. This can be explained by the load applied during the lamination step in the fabrication of the tape cast electrolyte, providing better powder compaction and adhesion. |
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| Keywords: | Solid oxide fuel cell Electrolyte Yttria stabilized zirconia Tape casting Dip coating Screen printing |
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