Electro-chemo-mechanical analysis of the effect of bending deformation on the interface of flexible solid-state battery

作     者：Yutao SHI Chengjun XU Bingbing CHEN Jianqiu ZHOU Rui CAI Yutao SHI;Chengjun XU;Bingbing CHEN;Jianqiu ZHOU;Rui CAI

作者机构：School of Mechanical and Power EngineeringNanjing Tech UniversityNanjing 210000China School of Energy Science and EngineeringNanjing Tech UniversityNanjing 210000China State Key Laboratory of Materials-Oriented Chemical EngineeringNanjing Tech UniversityNanjing 210009China 

出 版 物：《Applied Mathematics and Mechanics(English Edition)》 (应用数学和力学（英文版）)

年 卷 期：2023年第44卷第2期

页      面：189-206页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：the National Natural Science Foundation of China(No.11902144) the Postgraduate Research&Practice Innovation Program of Jiangsu Province of China(No.KYCX201074) the Natural Science Foundation of the Jiangsu Higher Education Institutions of China(No.19KJB430022) the Guizhou Provincial General Undergraduate Higher Education Technology Supporting Talent Support Program(No.KY(2018)043) 

主　　题：solid-state battery electro-chemo-mechanical coupling model bending deformation phase-transformation plastic deformation 

摘      要：Flexible solid-state battery has several unique characteristics including high flexibility,easy portability,and high safety,which may have broad application prospects in new technology products such as rollup displays,power implantable medical devices,and wearable *** interfacial mechanical and electrochemical problems caused by bending deformation,resulting in the battery damage and failure,are particularly ***,a fully coupled electro-chemo-mechanical model is developed based on the actual solid-state battery ***-dependent material parameters,stress-dependent diffusion,and potential shift are *** to four bending forms(k=8/mm,0/mm,-8/mm,and free),the results show that the negative curvature bending is beneficial to reducing the plastic strain during charging/discharging,while the positive curvature is ***,with respect to the electrochemical performance,the negative curvature bending creates a negative potential shift,which causes the battery to reach the cut-off voltage earlier and results in capacity *** results enlighten us that suitable electrode materials and charging strategy can be tailored to reduce plastic deformation and improve battery capacity for different forms of battery bending.