IMECH-IR  > 非线性力学国家重点实验室
Examining the validity of Stoney-equation for in-situ stress measurements in thin film electrodes using a large-deformation finite-element procedure
Wen JC(温济慈); Wei YJ(魏宇杰); Cheng YT
发表期刊JOURNAL OF POWER SOURCES
2018-05-31
卷号387页码:126-134
ISSN0378-7753
摘要During the lithiation and delithiation of a thin film electrode, stress in the electrode is deduced from the curvature change of the film using the Stoney equation. The accuracy of such a measurement is conditioned on the assumptions that (a) the mechanical properties of the electrode remain unchanged during lithiation and (b) small deformation holds. Here, we demonstrate that the change in elastic properties can influence the measurement of the stress in thin film electrodes. We consider the coupling between diffusion and deformation during lithiation and delithiation of thin film electrodes and implement the constitutive behavior in a finite deformation finite element procedure. We demonstrate that both the variation in elastic properties in thin film electrodes and finite-deformation during lithiation and delithiation would challenge the applicability of the Stoney-equation for in-situ stress measurements of thin film electrodes.
关键词Thin Film Electrode In-situ Stress Measurement Stoney Equation Diffusion Stress Coupling Finite-deformation Finite Element
DOI10.1016/j.jpowsour.2018.03.052
收录类别SCI ; EI
语种英语
WOS记录号WOS:000430899800016
关键词[WOS]INTERCALATION-INDUCED STRESS ; LITHIUM INSERTION ; SILICON ; DIFFUSION ; GENERATION ; PARTICLES ; EVOLUTION ; MODULUS ; DEVICES
WOS研究方向Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science
WOS类目Chemistry, Physical ; Electrochemistry ; Energy & Fuels ; Materials Science, Multidisciplinary
项目资助者National Natural Science Foundation of China (NSFC)(11425211) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB22020200) ; US National Science Foundation(1355438)
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力学所作者排名1
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被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77478
专题非线性力学国家重点实验室
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Wen JC,Wei YJ,Cheng YT. Examining the validity of Stoney-equation for in-situ stress measurements in thin film electrodes using a large-deformation finite-element procedure[J]. JOURNAL OF POWER SOURCES,2018,387:126-134.
APA 温济慈,魏宇杰,&Cheng YT.(2018).Examining the validity of Stoney-equation for in-situ stress measurements in thin film electrodes using a large-deformation finite-element procedure.JOURNAL OF POWER SOURCES,387,126-134.
MLA 温济慈,et al."Examining the validity of Stoney-equation for in-situ stress measurements in thin film electrodes using a large-deformation finite-element procedure".JOURNAL OF POWER SOURCES 387(2018):126-134.
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