A new in situ strategy to eliminate partial internal short circuit in Ce0.8Sm0.2O1.9-based solid oxide fuel cells

doi:10.1039/c7ta03527f

CORC > 合肥物质科学研究院 > 中国科学院合肥物质科学研究院 > 中科院固体物理研究所

	A new in situ strategy to eliminate partial internal short circuit in Ce0.8Sm0.2O1.9-based solid oxide fuel cells
	Gong, Zheng1 ; Sun, Wenping 2; Cao, Jiafeng 1; Wu, Yusen 1; Miao, Lina 1; Liu, Wei 1,3
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2017-07-07
卷号	5 期号:25 页码:12873-12878
DOI	10.1039/c7ta03527f
文献子类	Article
英文摘要	Partial internal short circuit resulting from the Ce4+/Ce3+ redox reaction is currently one of the most critical issues that hinder the practical application of solid oxide fuel cells (SOFCs) with doped ceria electrolytes. In this work, a new strategy utilizing a Sr diffusion induced in situ solid-state reaction to generate a blocking layer to prevent Ce0.8Sm0.2O1.9 (SDC) from reduction is proposed for the first time. As a proof of concept, Ni-SrCe0.95Yb0.05O3-delta is deployed as a Sr source for the electron-blocking interlayer and was evaluated as an anode for SDC-based SOFCs. A thin interlayer composed of SrCe1-x(Sm,Yb)(x)O3-delta and SDC is formed in situ during the sintering process of the half cell due to the interdiffusion of metal cations, and the interlayer thickness is highly dependent on the sintering temperature. The high-resolution TEM results indicate that the SrCe1-x(Sm,Yb)(x)O3-delta perovskite phase is generated and coated on the SDC grains, forming an SDC@SrCe1-x(Sm,Yb)(x)O3-delta core-shell structure. The SrCe1-x(Sm,Yb)(x)O3-delta phase effectively suppresses the Ce4+/Ce3+ redox reaction and hence eliminates electronic conduction through the electrolyte membrane. Consequently, the OCVs of the fuel cell are significantly improved after incorporating the electron-blocking interlayer and increase with increasing the interlayer thickness. The OCVs of the cell sintered at 1250 degrees C reach 0.962, 0.989, 1.017, and 1.039 V at 650, 600, 550, and 500 degrees C, respectively. The present results demonstrate that Ni-SrCeO3-based composites are promising alternative anodes for CeO2-based SOFCs towards enhanced working efficiency at high operating voltages.
WOS关键词	LOW-TEMPERATURE ; SDC ELECTROLYTE ; BLOCKING LAYER ; PERFORMANCE ; CATHODES ; SURFACE ; SOFCS ; SR ; MICROSTRUCTURE ; SEGREGATION
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science
语种	英语
WOS记录号	WOS:000404571500027
资助机构	National Natural Science Foundation of China(21676261 ; National Natural Science Foundation of China(21676261 ; National Natural Science Foundation of China(21676261 ; National Natural Science Foundation of China(21676261 ; Australian Research Council (ARC) DECRA Grant(DE160100596) ; Australian Research Council (ARC) DECRA Grant(DE160100596) ; Australian Research Council (ARC) DECRA Grant(DE160100596) ; Australian Research Council (ARC) DECRA Grant(DE160100596) ; U1632131) ; U1632131) ; U1632131) ; U1632131) ; National Natural Science Foundation of China(21676261 ; National Natural Science Foundation of China(21676261 ; National Natural Science Foundation of China(21676261 ; National Natural Science Foundation of China(21676261 ; Australian Research Council (ARC) DECRA Grant(DE160100596) ; Australian Research Council (ARC) DECRA Grant(DE160100596) ; Australian Research Council (ARC) DECRA Grant(DE160100596) ; Australian Research Council (ARC) DECRA Grant(DE160100596) ; U1632131) ; U1632131) ; U1632131) ; U1632131)
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/31980]
专题	合肥物质科学研究院_中科院固体物理研究所
作者单位	1.Univ Sci & Technol China, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, CAS Key Lab Mat Energy Convers, Hefei 230026, Peoples R China 2.Univ Wollongong, Australian Inst Innovat Mat, Inst Superconducting & Elect Mat, Wollongong, NSW 2522, Australia 3.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Gong, Zheng,Sun, Wenping,Cao, Jiafeng,et al. A new in situ strategy to eliminate partial internal short circuit in Ce0.8Sm0.2O1.9-based solid oxide fuel cells[J]. JOURNAL OF MATERIALS CHEMISTRY A,2017,5(25):12873-12878.
APA	Gong, Zheng,Sun, Wenping,Cao, Jiafeng,Wu, Yusen,Miao, Lina,&Liu, Wei.(2017).A new in situ strategy to eliminate partial internal short circuit in Ce0.8Sm0.2O1.9-based solid oxide fuel cells.JOURNAL OF MATERIALS CHEMISTRY A,5(25),12873-12878.
MLA	Gong, Zheng,et al."A new in situ strategy to eliminate partial internal short circuit in Ce0.8Sm0.2O1.9-based solid oxide fuel cells".JOURNAL OF MATERIALS CHEMISTRY A 5.25(2017):12873-12878.