Effect of SDC-impregnated LSM cathodes on the performance of anode-supported YSZ films for SOFCs

IMR OpenIR

	Effect of SDC-impregnated LSM cathodes on the performance of anode-supported YSZ films for SOFCs
	K. F. Chen; Z. Lu; N. Ai; X. J. Chen; J. Y. Hu; X. Q. Huang; W. H. Su
	2007
发表期刊	Journal of Power Sources
ISSN	0378-7753
卷号	167 期号:1 页码:84-89
摘要	Sm0.2Ce0.8O1.9 (SDC)-impregnated La0.7Sr0.3MnO3 (LSM) composite cathodes were fabricated on anode-supported yttria-stabilized zirconia (YSZ) thin films. Electrochemical performances of the solid oxide fuel cells (SOFCs) were investigated in the present study. Four single cells, i.e., Cell-1, Cell-2, Cell-3 and Cell-4 were obtained after the fabrication of four different cathodes, i.e., pure LSM and SDC/LSM composites in the weight ratios of 25/75, 36/64 and 42/58, respectively. Impedance spectra under open-circuit conditions showed that the cathode performance was gradually improved with the increasing SDC loading. Similarly, the maximum power densities (MPD) of the four cells were increased with the SDC amount below 700 degrees C. Whereas, the cell performance of Cell-4 was lower than that of Cell-3 at 800 degrees C, arising from the increased concentration polarization at high current densities. This was caused by the lowered porosity with the impregnation cycle. This disadvantage could be suppressed by lowering the operating temperature or by increasing the oxygen concentration at the cathode side. The ratio of electrode polarization loss in the total voltage drop versus current density showed that the cell performance was primarily determined by the electrode polarization. The contribution of the ohmic resistance was increased when the operating temperature was lowered. When a 100 ml min(-1) oxygen flow was introduced to the cathode side, Cell-3 produced MPDs of 1905, 1587 and 1179 mW cm(-2) at 800, 750 and 700 degrees C, respectively. The high cell outputs demonstrated the merits of the novel and effective SDC-impregnated LSM cathodes. (C) 2007 Elsevier B.V. All rights reserved.
部门归属	harbin inst technol, ctr condensed matter sci & technol, harbin 150001, peoples r china. harbin inst technol, div theoret phys, harbin 150001, peoples r china. jilin univ, dept condensed matter, changchun 130022, peoples r china. acad sinica, int ctr mat phys, shenyang 110015, peoples r china.;lu, z (reprint author), harbin inst technol, ctr condensed matter sci & technol, harbin 150001, peoples r china;lvzhe@hit.edu.cn explorer_081@163.com
关键词	La0.7sr0.3mno3 (Lsm) Impregnation Sm0.2ce0.8o1.9 (Sdc) Concentration Polarization Mass Transfer Process Oxide Fuel-cells Doped Ceria Electrolytes Thin-film Coating Technique Low-temperature It-sofcs Fabrication Electrodes Parameters Oxygen
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WOS记录号	WOS:000246256300014
引用统计	被引频次：49[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/33449
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	K. F. Chen,Z. Lu,N. Ai,et al. Effect of SDC-impregnated LSM cathodes on the performance of anode-supported YSZ films for SOFCs[J]. Journal of Power Sources,2007,167(1):84-89.
APA	K. F. Chen.,Z. Lu.,N. Ai.,X. J. Chen.,J. Y. Hu.,...&W. H. Su.(2007).Effect of SDC-impregnated LSM cathodes on the performance of anode-supported YSZ films for SOFCs.Journal of Power Sources,167(1),84-89.
MLA	K. F. Chen,et al."Effect of SDC-impregnated LSM cathodes on the performance of anode-supported YSZ films for SOFCs".Journal of Power Sources 167.1(2007):84-89.