Examining the validity of Stoney-equation for in-situ stress measurements in thin film electrodes using a large-deformation finite-element procedure

Jici Wen; Yujie Wei; Yang Tse Cheng

doi:10.1016/j.jpowsour.2018.03.052

Examining the validity of Stoney-equation for in-situ stress measurements in thin film electrodes using a large-deformation finite-element procedure

Jici Wen
, Yujie Wei
, Yang Tse Cheng

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	126-134
Number of pages	9
Journal	Journal of Power Sources
Volume	387
DOIs	https://doi.org/10.1016/j.jpowsour.2018.03.052
State	Published - May 31 2018

Bibliographical note

Publisher Copyright:
© 2018 Elsevier B.V.

Funding

The authors acknowledge support from the National Natural Science Foundation of China (NSFC) (Grant no. 11425211), the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB22020200). YTC would like to thank US National Science Foundation award 1355438 “Powering the Kentucky Bioeconomy for a Sustainable Future.”

Funders	Funder number
Powering the Kentucky Bioeconomy
National Science Foundation Arctic Social Science Program	1355438
National Natural Science Foundation of China (NSFC)	11425211
Chinese Academy of Sciences	XDB22020200

Keywords

Diffusion–stress coupling
Finite-deformation finite element
In-situ stress measurement
Stoney equation
Thin film electrode

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.jpowsour.2018.03.052

Cite this

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title = "Examining the validity of Stoney-equation for in-situ stress measurements in thin film electrodes using a large-deformation finite-element procedure",

abstract = "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.",

keywords = "Diffusion–stress coupling, Finite-deformation finite element, In-situ stress measurement, Stoney equation, Thin film electrode",

author = "Jici Wen and Yujie Wei and Cheng, \{Yang Tse\}",

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doi = "10.1016/j.jpowsour.2018.03.052",

language = "English",

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T1 - Examining the validity of Stoney-equation for in-situ stress measurements in thin film electrodes using a large-deformation finite-element procedure

AU - Wen, Jici

AU - Wei, Yujie

AU - Cheng, Yang Tse

PY - 2018/5/31

Y1 - 2018/5/31

N2 - 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.

AB - 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.

KW - Diffusion–stress coupling

KW - Finite-deformation finite element

KW - In-situ stress measurement

KW - Stoney equation

KW - Thin film electrode

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U2 - 10.1016/j.jpowsour.2018.03.052

DO - 10.1016/j.jpowsour.2018.03.052

M3 - Article

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SN - 0378-7753

VL - 387

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JO - Journal of Power Sources

JF - Journal of Power Sources

ER -

Examining the validity of Stoney-equation for in-situ stress measurements in thin film electrodes using a large-deformation finite-element procedure

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

UN SDGs

Access to Document

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