In situ measurement of mechanical property and stress evolution in a composite silicon electrode

Dawei Li; Yikai Wang; Jiazhi Hu; Bo Lu; Yang Tse Cheng; Junqian Zhang

doi:10.1016/j.jpowsour.2017.09.004

In situ measurement of mechanical property and stress evolution in a composite silicon electrode

Dawei Li, Yikai Wang, Jiazhi Hu, Bo Lu, Yang Tse Cheng, Junqian Zhang

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

57 Scopus citations

Abstract

Mechanical properties and lithiation-induced stress are crucial to the performance and durability of lithium-ion batteries. Here, we report the evolution of elastic modulus and stress in a silicon/polyvinylidene fluoride (PVDF) composite electrode coated on a copper foil, along with a model for analyzing the large change in the radius of curvature of the composite electrode/copper foil cantilever. The radius of curvature of the cantilever is captured by a video camera during lithiation/delithiation. The elastic modulus of the composite electrode decreases from about 0.64 GPa to 0.18 GPa during lithiation. It decreases further to about 0.10 GPa after delithiation, which is caused by the fracture of the electrode. The magnitude of the compressive stress increases lineally during lithiation and decreases suddenly to reach a steady state value during delithiation.

Original language	English
Pages (from-to)	80-85
Number of pages	6
Journal	Journal of Power Sources
Volume	366
DOIs	https://doi.org/10.1016/j.jpowsour.2017.09.004
State	Published - 2017

Bibliographical note

Publisher Copyright:
© 2017 Elsevier B.V.

Funding

The authors gratefully acknowledge the financial supports of the National Science Foundation of China under Grant No. 11332005 and 11172159 , and the Shanghai Municipal Education Commission, China , under Grant No. 13ZZ070 . Dawei Li would like to acknowledge the support of China Scholarship Council . Yikai Wang, Jiazhi Hu, and Y.-T. Cheng would like to acknowledge the support from 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
Office of the Director	1355438
Office of the Director
National Natural Science Foundation of China (NSFC)	11332005, 11172159
National Natural Science Foundation of China (NSFC)
Shanghai Municipal Education Commission	13ZZ070
Shanghai Municipal Education Commission
China Scholarship Council

Keywords

Diffusion induced stress
Fracture
In situ measurement
Lithium-ion battery
Modulus
Silicon composite 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)

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10.1016/j.jpowsour.2017.09.004

Cite this

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title = "In situ measurement of mechanical property and stress evolution in a composite silicon electrode",

abstract = "Mechanical properties and lithiation-induced stress are crucial to the performance and durability of lithium-ion batteries. Here, we report the evolution of elastic modulus and stress in a silicon/polyvinylidene fluoride (PVDF) composite electrode coated on a copper foil, along with a model for analyzing the large change in the radius of curvature of the composite electrode/copper foil cantilever. The radius of curvature of the cantilever is captured by a video camera during lithiation/delithiation. The elastic modulus of the composite electrode decreases from about 0.64 GPa to 0.18 GPa during lithiation. It decreases further to about 0.10 GPa after delithiation, which is caused by the fracture of the electrode. The magnitude of the compressive stress increases lineally during lithiation and decreases suddenly to reach a steady state value during delithiation.",

keywords = "Diffusion induced stress, Fracture, In situ measurement, Lithium-ion battery, Modulus, Silicon composite electrode",

author = "Dawei Li and Yikai Wang and Jiazhi Hu and Bo Lu and Cheng, {Yang Tse} and Junqian Zhang",

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year = "2017",

doi = "10.1016/j.jpowsour.2017.09.004",

language = "English",

volume = "366",

pages = "80--85",

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T1 - In situ measurement of mechanical property and stress evolution in a composite silicon electrode

AU - Li, Dawei

AU - Wang, Yikai

AU - Hu, Jiazhi

AU - Lu, Bo

AU - Cheng, Yang Tse

AU - Zhang, Junqian

PY - 2017

Y1 - 2017

N2 - Mechanical properties and lithiation-induced stress are crucial to the performance and durability of lithium-ion batteries. Here, we report the evolution of elastic modulus and stress in a silicon/polyvinylidene fluoride (PVDF) composite electrode coated on a copper foil, along with a model for analyzing the large change in the radius of curvature of the composite electrode/copper foil cantilever. The radius of curvature of the cantilever is captured by a video camera during lithiation/delithiation. The elastic modulus of the composite electrode decreases from about 0.64 GPa to 0.18 GPa during lithiation. It decreases further to about 0.10 GPa after delithiation, which is caused by the fracture of the electrode. The magnitude of the compressive stress increases lineally during lithiation and decreases suddenly to reach a steady state value during delithiation.

AB - Mechanical properties and lithiation-induced stress are crucial to the performance and durability of lithium-ion batteries. Here, we report the evolution of elastic modulus and stress in a silicon/polyvinylidene fluoride (PVDF) composite electrode coated on a copper foil, along with a model for analyzing the large change in the radius of curvature of the composite electrode/copper foil cantilever. The radius of curvature of the cantilever is captured by a video camera during lithiation/delithiation. The elastic modulus of the composite electrode decreases from about 0.64 GPa to 0.18 GPa during lithiation. It decreases further to about 0.10 GPa after delithiation, which is caused by the fracture of the electrode. The magnitude of the compressive stress increases lineally during lithiation and decreases suddenly to reach a steady state value during delithiation.

KW - Diffusion induced stress

KW - Fracture

KW - In situ measurement

KW - Lithium-ion battery

KW - Modulus

KW - Silicon composite electrode

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In situ measurement of mechanical property and stress evolution in a composite silicon electrode

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

UN SDGs

Access to Document

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