The influence of stress-dependent overpotential on dendrite growth in all-solid-state battery with cracks

ZHANG ZhenHua ¹ZHANG Yong ²LIU Chang ³HOU Xu ⁴WANG Jie⁵

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作者信息

1. Department of Engineering Mechanics,School of Aeronautics and Astronautics,Zhejiang University,Hangzhou 310027,China
2. School of Aerospace Engineering and Applied Mechanics,Tongji University,Shanghai 200092,China
3. Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province,School of Mechanics and Aerospace Engineering,Southwest Jiaotong University,Chengdu 610031,China
4. Department of Engineering Mechanics,School of Aeronautics and Astronautics,Zhejiang University,Hangzhou 310027,China;Department of Industrial and Systems Engineering,The Hong Kong Polytechnic University,Hong Kong 999077,China
5. Department of Engineering Mechanics,School of Aeronautics and Astronautics,Zhejiang University,Hangzhou 310027,China;Zhejiang Laboratory,Hangzhou 311100,China;Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province,Zhejiang University,Hangzhou 310027,China
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Abstract

Dendrite growth is one of the main challenges in maintaining the service life of all-solid-state lithium-ion batteries.Mechanical stress has been reported to significantly affect dendrite growth.In this study,to explain the effect of mechanical stress on electrochemical reactions in all-solid-state batteries,a modified phase-field model for dendrite growth is proposed by con-sidering the stress-dependent overpotential.Dendrite growth under different mechanical loadings in an all-solid-state battery is investigated using the proposed model.Consistent with previous experimental results,the current result shows that compressive stress inhibits dendrite growth.Considering the stress concentration at the tips of processing-induced microcracks,the effects of the number and distribution of microcracks on dendrite growth are investigated.The results show that the stress-concentration field induced at the tips of cracks or voids can change the morphology of dendrites and decrease their growth rates.This study provides a new perspective for explaining Li dendrite growth under mechanical stress and offers inspiration for prolonging the service life of all-solid-state batteries based on defect and stress regulation,which may be further realized in experiments by filling solid electrolytes with different types of nanofillers.

Key words

Butler-Volmer equation/stress-dependent overpotential/microcracks/all-solid-state battery/phase-field simulation

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基金项目

National Natural Science Foundation of China(12192214)

National Natural Science Foundation of China(12272338)

National Natural Science Foundation of China(12102387)

Key Research Project of Zhejiang Laboratory(2021PE0AC02)

support provided by RGC Postdoctoral Fellowship Scheme(PDFS2223-5S08)

PolyU Distinguished Postdoctoral Fellowship Scheme(1-YWBC)

出版年

2024

中国科学:技术科学(英文版)

中国科学院

中国科学:技术科学(英文版)

CSTPCDEI

影响因子：1.056

ISSN：1674-7321

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