Synthesis, electrical and electrochemical properties of Ba0.5Sr0.5Zn0.2Fe0.8O3-delta perovskite oxide for IT-SOFC cathode

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	Synthesis, electrical and electrochemical properties of Ba0.5Sr0.5Zn0.2Fe0.8O3-delta perovskite oxide for IT-SOFC cathode
	B. Wei; Z. Lu; X. Q. Huang; M. L. Liu; N. Li; W. H. Su
	2008
发表期刊	Journal of Power Sources
ISSN	0378-7753
卷号	176 期号:1 页码:40916
摘要	The Ba0.5Sr0.5Zn0.2Fe0.8O3-delta (BSZF) complex oxide with cubic perovskite structure was synthesized and examined as anew cobalt-free cathode for intermediate-temperature solid oxide fuel cells (IT-SOFCs). The electrical conductivity was relatively low with a peak value of 9.4 S cm(-1) at about 590 degrees C, which was mainly caused by the high concentration of oxygen vacancy and the doping of bivalent zinc in B-sites. At 650 degrees C and under open circuit condition, symmetrical BSZF cathode on Sm-doped ceria (SDC) electrolyte showed polarization resistances (R-p) of 0.48 Omega cm(2) and 0.35 Omega cm(2) in air and oxygen, respectively. The dependence of R-P with oxygen partial pressure indicated that the rate-limiting step for oxygen reduction was oxygen adsorption/desorption kinetics. Using B SZF as the cathode, the wet hydrogen fueled Ni + SDC anode-supported single cell exhibited peak power densities of 392 mW cm(-2) and 626 mW cm(-2) at 650 degrees C when stationary air and oxygen flux were used as oxidants, respectively. (c) 2007 Elsevier B.V. All rights reserved.
部门归属	[wei, bo; lue, zhe; huang, xiqiang; liu, mingliang; li, na; su, wenhui] harbin inst technol, ctr condensed matter sci & technol, harbin 150001, peoples r china. [su, wenhui] jilin univ, dept phys, changchun 130023, peoples r china. [su, wenhui] chinese acad sci, int ctr mat phys, shenyang 110015, peoples r china.;wei, b (reprint author), harbin inst technol, ctr condensed matter sci & technol, harbin 150001, peoples r china;wavingwei@126.com
关键词	Solid Oxide Fuel Cells Cathode Ba0.5sr0.5zn0.2fe0.8o3-delta Electrical Conductivity Electrochemical Performance Intermediate Temperature Sofc Fuel-cells Composite Cathodes Performance Electrolytes Ba0.5sr0.5co0.8fe0.2o3-delta 500-degrees-c Fabrication Stability Anode
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WOS记录号	WOS:000252823400001
引用统计	被引频次：173[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/321006/33179
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	B. Wei,Z. Lu,X. Q. Huang,et al. Synthesis, electrical and electrochemical properties of Ba0.5Sr0.5Zn0.2Fe0.8O3-delta perovskite oxide for IT-SOFC cathode[J]. Journal of Power Sources,2008,176(1):40916.
APA	B. Wei,Z. Lu,X. Q. Huang,M. L. Liu,N. Li,&W. H. Su.(2008).Synthesis, electrical and electrochemical properties of Ba0.5Sr0.5Zn0.2Fe0.8O3-delta perovskite oxide for IT-SOFC cathode.Journal of Power Sources,176(1),40916.
MLA	B. Wei,et al."Synthesis, electrical and electrochemical properties of Ba0.5Sr0.5Zn0.2Fe0.8O3-delta perovskite oxide for IT-SOFC cathode".Journal of Power Sources 176.1(2008):40916.