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Stress evolution in elastic-plastic electrodes during electrochemical processes: A numerical method and its applications
Wen JC(温济慈); Wei YJ(魏宇杰); Cheng YT(郑仰泽)
Source PublicationJOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
2018-07-01
Volume116Pages:403-415
ISSN0022-5096
AbstractMonitoring in real time the stress state in high capacity electrodes during charge-discharge processes is pivotal to the performance assessment and structural optimization of advanced batteries. The wafer curvature measurement technique broadly employed in thin-film industry, together with stress analysis using the Stoney equation, has been successfully adopted to measure in situ the stress in thin film electrodes. How large plastic deformation or interfacial delamination during electrochemical cycles in such electrodes affects the applicability of Stoney equation remains unclear. Here we develop a robust electrochemical-mechanical coupled numerical procedure to investigate the influence of large plastic deformation and interfacial failure on the measured stress in thin film electrodes. We identify how the constitutive behavior of electrode materials and film-substrate interfacial properties affect the measured stress-capacity curves of electrodes, and hence establish the relationship of electrode material parameters with the characteristics of stress-capacity curves. Using Li-ions batteries as examples, we show that plastic deformation and interfacial delamination account for the asymmetric stress-capacity loops seen in in situ stress measurements. The methods used here, along with the finite-element code in the supplementary material, may be used to model the electrode behavior as a function of the state of charge. (C) 2018 Elsevier Ltd. All rights reserved.
KeywordBattery mechanics Electrochemical-mechanical coupling Interfacial delamination In situ stress measurement Finite element method
DOI10.1016/j.jmps.2018.04.006
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000436215200021
WOS KeywordLITHIUM-ION BATTERIES ; THIN-FILM ELECTRODES ; INTERCALATION-INDUCED STRESS ; SILICON ELECTRODES ; LITHIATED SILICON ; NEGATIVE-ELECTRODES ; FRACTURE ; DIFFUSION ; ANODES ; DEFORMATION
WOS Research AreaMaterials Science, Multidisciplinary ; Mechanics ; Physics, Condensed Matter
WOS SubjectMaterials Science ; Mechanics ; Physics
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]
Classification一类/力学重要期刊
Ranking1
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/77900
Collection非线性力学国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China
2.Univ Kentucky, Dept Chem & Mat Engn, Lexington, KY 40506 USA
3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Wen JC,Wei YJ,Cheng YT. Stress evolution in elastic-plastic electrodes during electrochemical processes: A numerical method and its applications[J]. JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,2018,116:403-415.
APA 温济慈,魏宇杰,&Cheng YT.(2018).Stress evolution in elastic-plastic electrodes during electrochemical processes: A numerical method and its applications.JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,116,403-415.
MLA 温济慈,et al."Stress evolution in elastic-plastic electrodes during electrochemical processes: A numerical method and its applications".JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS 116(2018):403-415.
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