A comparative study of the R-P phase Srn+1FenO3n+1 (n=1, 2 and 3) cathodes for intermediate temperature solid oxide fuel cells

doi:10.1016/j.ceramint.2020.04.274

	A comparative study of the R-P phase Srn+1FenO3n+1 (n=1, 2 and 3) cathodes for intermediate temperature solid oxide fuel cells
	Dong, Kuan 1,2; Hou, Jie 6; Miao, Lina 1,2; Jin, Zongzi 1,2; Wang, Di 1,2; Teng, Yue 1,2,4,5; Liu, Wei 1,2,3
刊名	CERAMICS INTERNATIONAL
	2020-08-01
卷号	46
关键词	Proton-conducting SOFCs Ruddlesden-Popper Electrical conductivity Oxygen incorporation kinetics Average valence state
ISSN号	0272-8842
DOI	10.1016/j.ceramint.2020.04.274
通讯作者	Teng, Yue(tengyue@mail.ustc.edu.cn) ; Liu, Wei(wliu@ustc.edu.cn)
英文摘要	A comparative investigation of the Ruddlesden-Popper (R-P) phase Srn+1FenO3n +1 (SFO, n = 1, 2 and 3) series of materials has been explored to determine their applicability as cathodes for proton-conducting solid oxide fuel cells (H-SOFCs). With the traditional solid-state reaction method, pure SFO powders were obtained. As n increases, the composition of perovskite in the material increases gradually, and the proportion of the rock salt layer decreases accordingly. The valence state of iron in the SFOs was analyzed using X-ray photoelectron spectroscopy (XPS), and the results were consistent with those estimated by an X-ray absorption fine structure (XAFS) analysis. The results show that the average valence state of iron is the lowest in SFO2 and the highest in SFO3. Notably, Sr3Fe2O7 (SFO2, n = 2) and Sr4Fe3O10, (SFO3, n = 3) showed better electronic conductivity compared with Sr2FeO4 (SFO1, n = 1), in which SFO2 was the best. Paralleling the conductivity test, the oxygen incorporation kinetics of SFO2 were better than the other two components, as measured by the electricity conductivity relaxation (ECR) method. Single cells with the structure of NiO-BaZr0.1Ce0.7Y0.2O3-delta (NiO-BZCY) anode vertical bar-BZCY electrolyte vertical bar-SFO-5wt.% BZCY cathode were also fabricated and measured from 550 to 700 degrees C. At 700 degrees C, the maximum power density of 703.8 mWcm(-2) was achieved with the SFO2-5wt.%BZCY cathode. In conclusion, SFO2 with two BO6 layers connected with a perovskite-related R-P structure is a promising cathode candidate for H-SOFCs, providing new directions for other R-P phase electrode materials for H-SOFCs.
资助项目	National Science Foundation of China[U1632131] ; National Science Foundation of China[21676261]
WOS关键词	PROTON-CONDUCTING SOFCS ; COBALT-FREE CATHODE ; HIGH-PERFORMANCE ; TRANSPORT-PROPERTIES ; COMPOSITE CATHODE ; ELECTROLYTE ; MECHANISM
WOS研究方向	Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000537564300111
资助机构	National Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/103101]
专题	中国科学院合肥物质科学研究院
通讯作者	Teng, Yue; Liu, Wei
作者单位	1.Univ Sci & Technol China, CAS Key Lab Mat Energy Convers, Hefei 230026, Peoples R China 2.Univ Sci & Technol China, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Hefei 230026, Peoples R China 3.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China 4.State Grid Anhui Elect Power Res Inst Co Ltd, Hefei 230601, Peoples R China 5.Anhui Elect Power Design Inst Co Ltd, China Energy Engn Grp, Hefei 230601, Peoples R China 6.Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen 518055, Peoples R China
推荐引用方式 GB/T 7714	Dong, Kuan,Hou, Jie,Miao, Lina,et al. A comparative study of the R-P phase Srn+1FenO3n+1 (n=1, 2 and 3) cathodes for intermediate temperature solid oxide fuel cells[J]. CERAMICS INTERNATIONAL,2020,46.
APA	Dong, Kuan.,Hou, Jie.,Miao, Lina.,Jin, Zongzi.,Wang, Di.,...&Liu, Wei.(2020).A comparative study of the R-P phase Srn+1FenO3n+1 (n=1, 2 and 3) cathodes for intermediate temperature solid oxide fuel cells.CERAMICS INTERNATIONAL,46.
MLA	Dong, Kuan,et al."A comparative study of the R-P phase Srn+1FenO3n+1 (n=1, 2 and 3) cathodes for intermediate temperature solid oxide fuel cells".CERAMICS INTERNATIONAL 46(2020).