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
Source PublicationJOURNAL OF POWER SOURCES
2018-05-31
Volume387Pages:126-134
ISSN0378-7753
AbstractDuring 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.
KeywordThin Film Electrode In-situ Stress Measurement Stoney Equation Diffusion Stress Coupling Finite-deformation Finite Element
DOI10.1016/j.jpowsour.2018.03.052
Indexed BySCI ; EI
Language英语
WOS IDWOS:000430899800016
WOS KeywordINTERCALATION-INDUCED STRESS ; LITHIUM INSERTION ; SILICON ; DIFFUSION ; GENERATION ; PARTICLES ; EVOLUTION ; MODULUS ; DEVICES
WOS Research AreaChemistry ; Electrochemistry ; Energy & Fuels ; Materials Science
WOS SubjectChemistry, Physical ; Electrochemistry ; Energy & Fuels ; Materials Science, Multidisciplinary
Funding OrganizationNational 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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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/77478
Collection非线性力学国家重点实验室
Recommended Citation
GB/T 7714
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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