Ba and Gd Doping Effect in (BaxSr1-x)(0.95)Gd0.05Co0.8Fe0.2O3-delta (x = 0.1-0.9) Cathode on the Phase Structure and Electrochemical Performance

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	Ba and Gd Doping Effect in (BaxSr1-x)(0.95)Gd0.05Co0.8Fe0.2O3-delta (x = 0.1-0.9) Cathode on the Phase Structure and Electrochemical Performance
	Z. Li; B. Wei; Z. Lu; X. Zhu; X. Huang; Y. Zhang; Z. Guo; W. Su
	2012
发表期刊	Fuel Cells
ISSN	1615-6846
卷号	12 期号:4 页码:633-641
摘要	In this study, BaxSr1xCo0.8Fe0.2O3 delta (BSCF) doped with trace of Gd were studied for phase structures and properties about thermal expansion, electrical conductivity, and electrocatalytic activity. The solution range of barium in BaxSr1xCo0.8Fe0.2O3 delta can be extended to 0.1 <= x <=?0.7 after the introduction of small amount of Gd3+ ions (only for 5%) into the Ba/Sr-site. The calculation results of the crystal structure and the crystal lattice energy show that the ratio of Ba/Sr and doping of Gd3+ lead to increase the lattice parameter and the Co/Fe ionic average valence state in B-site. Moreover, the ratio of Ba/Sr and doping of Gd3+ were found to have significant impacts on the high-temperature physical properties and electrochemical characteristics. All oxides exhibited decreases in the thermal expansion coefficient (TEC) and electrical conductivity with increasing Ba/Sr ratio. Barium insertion was found to change the area-specific resistance (ASR) of porous (not dense) cathodes. An ASR values of 0.048, 0.072, 0.064, 0.121, and 0.059 Omega cm2 under air condition were observed at 650?degrees C for BSGCF with x?=?0.1, 0.2, 0.3, 0.5, and 0.7, respectively.
部门归属	[li, z.; wei, b.; lu, z.; zhu, x.; huang, x.; zhang, y.; guo, z.; su, w.] harbin inst technol, dept phys, ctr condensed matter sci & technol, harbin 150001, peoples r china. [li, z.] harbin normal univ, key lab photon & elect bandgap mat, minist educ, sch phys & elect engn, harbin 150025, peoples r china. [su, w.] chinese acad sci, int ctr mat phys, shenyang 110015, peoples r china.;lu, z (reprint author), harbin inst technol, dept phys, ctr condensed matter sci & technol, harbin 150001, peoples r china.;lvzhe@hit.edu.cn
关键词	Crystal Lattice Energy Electrical Conductivity Electrochemical Performance Phase Structure Thermal Expansion Coefficient Oxide Fuel-cells Doped Ba0.5sr0.5co0.8fe0.2o3-delta Electrical-conductivity Thermal-expansion Temperature Perovskite Oxidation Sofc
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60085
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. Li,B. Wei,Z. Lu,et al. Ba and Gd Doping Effect in (BaxSr1-x)(0.95)Gd0.05Co0.8Fe0.2O3-delta (x = 0.1-0.9) Cathode on the Phase Structure and Electrochemical Performance[J]. Fuel Cells,2012,12(4):633-641.
APA	Z. Li.,B. Wei.,Z. Lu.,X. Zhu.,X. Huang.,...&W. Su.(2012).Ba and Gd Doping Effect in (BaxSr1-x)(0.95)Gd0.05Co0.8Fe0.2O3-delta (x = 0.1-0.9) Cathode on the Phase Structure and Electrochemical Performance.Fuel Cells,12(4),633-641.
MLA	Z. Li,et al."Ba and Gd Doping Effect in (BaxSr1-x)(0.95)Gd0.05Co0.8Fe0.2O3-delta (x = 0.1-0.9) Cathode on the Phase Structure and Electrochemical Performance".Fuel Cells 12.4(2012):633-641.