Fabrication of micro-tubular solid oxide fuel cells with a single-grain-thick yttria stabilized zirconia electrolyte |
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Authors: | Toshio Suzuki Md. Hasan Zahir Yoshinobu Fujishiro Nigel Sammes |
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Affiliation: | a Advanced Manufacturing Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Anagahora Shimo-shidami, Nagoya, 463-8560, Japan b Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, CO, USA |
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Abstract: | This study discusses the fabrication and electrochemical performance of micro-tubular solid oxide fuel cells (SOFCs) with an electrolyte consisting a single-grain-thick yttria stabilized zirconia (YSZ) layer. It is found that a uniform coating of an electrolyte slurry and controlled shrinkage of the supported tube leads to a dense, crack-free, single-grain-thick (less than 1 μm) electrolyte on a porous anode tube. The SOFC has a power density of 0.39 W cm−2 at an operating temperature as low as 600 °C, with YSZ and nickel/YSZ for the electrolyte and anode, respectively. An examination is made of the effect of hydrogen fuel flow rate and shown that a higher flow rate leads to better cell performance. Hence a YSZ cell can be used for low-temperature SOFC systems below 600 °C, simply by optimizing the cell structure and operating conditions. |
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Keywords: | Solid oxide fuel cell Yttria stabilized zirconia Ni-yttria stabilized zirconia Anode Micro-tubular Electrolyte |
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