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

作　　者：ZHANG ZhenHua ZHANG Yong LIU Chang HOU Xu WANG Jie 

机构地区：[1]Department of Engineering Mechanics,School of Aeronautics and Astronautics,Zhejiang University,Hangzhou 310027,China [2]Zhejiang Laboratory,Hangzhou 311100,China [3]Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province,Zhejiang University,Hangzhou 310027,China [4]School of Aerospace Engineering and Applied Mechanics,Tongji University,Shanghai 200092,China [5]Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province,School of Mechanics and Aerospace Engineering,Southwest Jiaotong University,Chengdu 610031,China [6]Department of Industrial and Systems Engineering,The Hong Kong Polytechnic University,Hong Kong 999077,China

出　　处：《Science China(Technological Sciences)》2024年第8期2493-2504,共12页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.12192214,12272338,12102387);the Key Research Project of Zhejiang Laboratory(Grant No.2021PE0AC02);the support provided by RGC Postdoctoral Fellowship Scheme(Grant No.PDFS2223-5S08);the PolyU Distinguished Postdoctoral Fellowship Scheme(Grant No.1-YWBC)。

摘　　要：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 considering 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.

关 键 词：Butler–Volmer equation stress-dependent overpotential MICROCRACKS all-solid-state battery phase-field simulation 

分 类 号：TM912[电气工程—电力电子与电力传动]