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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)
2018-07-01
发表期刊JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
卷号116页码:403-415
ISSN0022-5096
摘要Monitoring 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.
关键词Battery 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
收录类别SCI ; EI
语种英语
WOS记录号WOS:000436215200021
关键词[WOS]LITHIUM-ION BATTERIES ; THIN-FILM ELECTRODES ; INTERCALATION-INDUCED STRESS ; SILICON ELECTRODES ; LITHIATED SILICON ; NEGATIVE-ELECTRODES ; FRACTURE ; DIFFUSION ; ANODES ; DEFORMATION
WOS研究方向Materials Science, Multidisciplinary ; Mechanics ; Physics, Condensed Matter
WOS类目Materials Science ; Mechanics ; Physics
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]
论文分区一类/力学重要期刊
力学所作者排名1
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文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77900
专题非线性力学国家重点实验室
作者单位1.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
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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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