Mathematical modeling and simulations of stress mitigation by coating polycrystalline particles in lithium-ion batteries

作     者：N.IQBAL J.CHOI S.F.SHAH C.LEE S.LEE N.IQBAL;J.CHOI;S.F.SHAH;C.LEE;S.LEE

作者机构：Department of MechanicalRoboticsand Energy EngineeringDongguk University-SeoulSeoul 04620Republic of Korea 

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

年 卷 期：2024年第45卷第6期

页      面：947-962页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070102[理学-计算数学] 0701[理学-数学] 080102[工学-固体力学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：the National Research Foundation of Korea(Nos.2018R1A5A7023490 and 2022R1A2C1003003) 

主　　题：lithium-ion battery(LIB) polycrystalline particle coating finite element simulation Ni-rich LiNixMnyCo_(z)O_(2)(x>0.8)(NMC) 

摘      要：A chemo-mechanical model is developed to investigate the effects on the stress development of the coating of polycrystalline Ni-rich LiNixMnyCo_(z)O_(2)(x≥0.8)(NMC)particles with poly(3,4-ethylenedioxythiophene)(PEDOT).The simulation results show that the coating of primary NMC particles significantly reduces the stress generation by efficiently accommodating the volume change associated with the lithium diffusion,and the coating layer plays roles both as a cushion against the volume change and a channel for the lithium transport,promoting the lithium distribution across the secondary particles more ***,the lower stiffness,higher ionic conductivity,and larger thickness of the coating layer improve the stress *** paper provides a mathematical framework for calculating the chemo-mechanical responses of anisotropic electrode materials and fundamental insights into how the coating of NMC active particles mitigates stress levels.