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	Preparation and properties of BaxSr1-xCoyFe1-yO3-delta cathode material for intermediate temperature solid oxide fuel cells
	Zhao, Hailei ; Shen, Wei ; Zhu, Zhiming ; Li, Xue ; Wang, Zhifeng
	2010-05-10 ; 2010-05-10
会议名称	JOURNAL OF POWER SOURCES ; International Workshop on Degradation Issues in Fuel Cells ; Crete, GREECE ; Web of Science
关键词	BSCF electrical conductivity cathode performance SOFCs ELECTROCHEMICAL PROPERTIES ELECTRICAL-CONDUCTIVITY THERMAL-EXPANSION SOFC CATHODE BA0.5SR0.5CO0.8FE0.2O3-DELTA LA1-XSRXCO1-YFEYO3 BEHAVIOR Electrochemistry Energy & Fuels
中文摘要	BaxSr1-xCoyFe1-yO3-delta (BSCF) materials with perovskite structure were synthesized via solid-state reaction. Their structural characteristics, electrical-conduction behavior and cathode performance were investigated. Compared to A-site elements, B-site elements show a wide solid-solution range in BSCF. The electrical-conduction behavior of BSCF obeys the small polaron-hopping mechanism. An increase of Ba or Co content in the BSCF samples results in a decrease of electrical conductivity, which is mainly attributable to the preferential existence of B3+ rather than B4+ in Ba- or Co-rich samples. At the same time, this leads to increases in the lattice parameter a and the number of oxygen vacancies. BSCF samples with high Ba content show a high structural stability (high oxygen-loss temperature). Ba0.6Sr0.4Co0.8Fe0.2O3-delta and Ba0.5Sr0.5CO0.8Fe0.2O3-delta materials present good thermal-cycling stability of the electrical conductivity. Compared with Ba0.5Sr0.5Co0.8Fe0.2O3-delta, Ba(0.6)Sr0(.4)CO(0.8)Fe(0.2)O(3-delta) exhibits a better cathode performance in a Ce0.8Gd0.2O2-delta (GDC)-supported halfcell. The cell performance can be improved by introducing a certain amount of GDC electrolyte into the BSCF cathode material. (c) 2008 Elsevier B.V. All rights reserved.
会议录出版者	ELSEVIER SCIENCE BV ; AMSTERDAM ; PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
语种	英语 ; 英语
内容类型	会议论文
源URL	[http://hdl.handle.net/123456789/19036]
专题	清华大学
推荐引用方式 GB/T 7714	Zhao, Hailei,Shen, Wei,Zhu, Zhiming,et al. Preparation and properties of BaxSr1-xCoyFe1-yO3-delta cathode material for intermediate temperature solid oxide fuel cells[C]. 见:JOURNAL OF POWER SOURCES, International Workshop on Degradation Issues in Fuel Cells, Crete, GREECE, Web of Science.

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