High-performance bilayered electrolyte intermediate temperature solid oxide fuel cells

被引:116
作者
Ahn, Jin Soo [1 ]
Pergolesi, Daniele [2 ,3 ]
Camaratta, Matthew A. [1 ]
Yoon, Heesung [1 ]
Lee, Byung Wook [1 ]
Lee, Kang Taek [1 ]
Jung, Doh Won [1 ]
Traversa, Enrico [2 ,3 ]
Wachsman, Eric D. [1 ]
机构
[1] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA
[2] Univ Roma Tor Vergata, Dept Chem Sci Technol, I-00133 Rome, Italy
[3] Natl Inst Mat Sci, Int Res Ctr Mat Nanoarchitecton, Tsukuba, Ibaraki 3050044, Japan
关键词
SOFC; IT-SOFC; Bilayered electrolyte; Bilayer electrolyte; ESB; GDC; IT-SOFCS; OXYGEN SEPARATION; CATHODES; FABRICATION; SYSTEM;
D O I
10.1016/j.elecom.2009.05.041
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
The ESB/GDC bilayer electrolyte concept has been proved to improve open circuit voltage and reduce the effective area specific resistance of SOFCs utilizing a conventional single-layer GDC electrolyte. However, high performance from such bilayer cells had not yet been demonstrated. The main obstacles toward this end have been fabrication of anode-supported thin-film electrolytes and the reactivity of ESB with conventional cathodes, Recently, an ESB-compatible low area specific resistance cathode was developed: microstructurally optimized Bi2Ru2O7-ESB composites. In addition, we recently developed a novel anode functional layer which can significantly enhance the performance of SOFC utilizing GDC electrolytes. This study combines these recent achievements in SOFC studies and shows that exceptionally high performance of SOFC is possible using ESB/GDC bilayer electrolytes and Bi2Ru2O7-ESB composite cathodes. The result confirms that the bilayer electrolyte and the Bi2Ru2O7-ESB cathode can increase the open circuit potential and reduce the total area specific resistance. The maximum power density of the bilayered SOFC was improved to 1.95 W cm(-2) with 0.079 Omega cm(2) total cell area specific resistance at 650 degrees C. This is the highest power yet achieved in the IT range and we believe redefines the expectation level for maximum power under IT-SOFC operating conditions. (c) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:1504 / 1507
页数:4
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