Stress field and failure probability analysis for the single cell of planar solid oxide fuel cells

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	Stress field and failure probability analysis for the single cell of planar solid oxide fuel cells
	Zhang, Tao 3,4; Zhu, Qingshan 3; Huang, Wen Lai 3; Xie, Zhaohui 3; Xin, Xianshuang 3
刊名	JOURNAL OF POWER SOURCES
	2008-08-01
卷号	182 期号:2 页码:540-545
关键词	single cell SOFC analytical model residual thermal stress failure probability
ISSN号	0378-7753
其他题名	J. Power Sources
中文摘要	An analytical model is developed to predict the residual thermal stresses in a single cell of solid oxide fuel cells (SOFCs), which consists of a thick porous 8 mol% Y2O3 stabilized zirconia/nickel oxide (8YSZ/NiO) anode, a dense 8YSZ electrolyte and a porous lanthanum strontium manganite (LSM) cathode. The simulated stresses in the cell at room temperature, which are resulted from the contraction mismatch of its components, indicate that the major principal stress in the anode is tensile while the electrolyte and cathode are under compressive stresses. The stress in one component decreases with the increase of its thickness when the thicknesses of the other two components are fixed, and the decrease of the tensile stress in the anode will cause the increase of the compressive stresses in both the cathode and the electrolyte, and vice versa. The analysis also reveals that the anode is the part that is most susceptible to fracture since the tensile thermal stress is so high that it reaches to the fracture strength of the anode material. The Weibull statistic is employed to estimate the failure probability of the anode. The simulation results indicate that the anode failure probability decreases with the increase of the anode thickness and the decrease of the electrolyte thickness. To keep the anode failure probability less than 1E-06, the anode thickness should be greater than 0.7 mm for a cell with an electrolyte thickness of 10 mu m and a cathode thickness of 20 mu n. Crown Copyright (c) 2008 Published by Elsevier B.V. All rights reserved.
英文摘要	An analytical model is developed to predict the residual thermal stresses in a single cell of solid oxide fuel cells (SOFCs), which consists of a thick porous 8 mol% Y2O3 stabilized zirconia/nickel oxide (8YSZ/NiO) anode, a dense 8YSZ electrolyte and a porous lanthanum strontium manganite (LSM) cathode. The simulated stresses in the cell at room temperature, which are resulted from the contraction mismatch of its components, indicate that the major principal stress in the anode is tensile while the electrolyte and cathode are under compressive stresses. The stress in one component decreases with the increase of its thickness when the thicknesses of the other two components are fixed, and the decrease of the tensile stress in the anode will cause the increase of the compressive stresses in both the cathode and the electrolyte, and vice versa. The analysis also reveals that the anode is the part that is most susceptible to fracture since the tensile thermal stress is so high that it reaches to the fracture strength of the anode material. The Weibull statistic is employed to estimate the failure probability of the anode. The simulation results indicate that the anode failure probability decreases with the increase of the anode thickness and the decrease of the electrolyte thickness. To keep the anode failure probability less than 1E-06, the anode thickness should be greater than 0.7 mm for a cell with an electrolyte thickness of 10 mu m and a cathode thickness of 20 mu n. Crown Copyright (c) 2008 Published by Elsevier B.V. All rights reserved.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Electrochemistry ; Energy & Fuels
研究领域[WOS]	Electrochemistry ; Energy & Fuels
关键词[WOS]	RESIDUAL-STRESSES ; THERMAL-STRESSES ; SOFC STACK ; REDUCTION ; STRENGTH ; MODEL
收录类别	ISTP ; SCI
原文出处	://WOS:000257599500020
语种	英语
WOS记录号	WOS:000257599500020
公开日期	2013-10-08
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/2919]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 4.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Tao,Zhu, Qingshan,Huang, Wen Lai,et al. Stress field and failure probability analysis for the single cell of planar solid oxide fuel cells[J]. JOURNAL OF POWER SOURCES,2008,182(2):540-545.
APA	Zhang, Tao,Zhu, Qingshan,Huang, Wen Lai,Xie, Zhaohui,&Xin, Xianshuang.(2008).Stress field and failure probability analysis for the single cell of planar solid oxide fuel cells.JOURNAL OF POWER SOURCES,182(2),540-545.
MLA	Zhang, Tao,et al."Stress field and failure probability analysis for the single cell of planar solid oxide fuel cells".JOURNAL OF POWER SOURCES 182.2(2008):540-545.