文献类型：期刊文献

中文题名：基于应力场的锂离子电池正极多尺度失效研究

英文题名：Multi-scale Failure Behavior of Cathode in Lithium-ion Batteries Based on Stress Field

作者：陈莹[1];栾伟玲[1];陈浩峰[1,2];朱轩辰[2]

机构：[1]华东理工大学机械与动力工程学院,石化行业动力电池系统与安全重点实验室,教育部承压系统与安全重点实验室,上海200237;[2]思克莱德大学机械与航空工程系,英国格拉斯哥G11XJ

年份：2022

卷号：37

期号：8

起止页码：918

中文期刊名：无机材料学报

外文期刊名：Journal of Inorganic Materials

收录：CSTPCD;;EI(收录号：20223712736149);Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000841496500012)】；北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；

基金：Fundamental Research Funds for the Central Universities (JKG01211523); Higher Education Discipline Innovation Project (111 Project)(B13020); National Natural Science Foundation of China (52150710540)

语种：中文

中文关键词：锂离子电池;正极;应力场;多尺度失效;寿命衰减

外文关键词：lithium-ion battery;cathode;stress field;multi-scale failure;life degradation

摘要：锂离子电池已广泛应用于动力和储能领域,电池寿命是影响其进一步发展的关键因素。循环充放电过程中的电化学-力学多场耦合作用会导致正极材料发生机械损伤累积,降低电极材料的结构稳定性并形成多尺度损伤,从而缩短电池循环充放电寿命。本文通过总结团队在三元正极材料多尺度失效行为方面的研究成果,系统介绍了不同尺度下实验与模拟相结合的电极材料损伤分析方法,旨在为不同尺度下选取损伤分析方法提供参考。基于电化学循环实验表征、扩展有限元分析法(XFEM)、线性匹配法(LMM)等研究手段,深入分析了电极材料在多尺度下的力学损伤机理。研究工作为电极材料的多尺度失效行为分析及结构改性提供了重要指导。
Lithium-ion batteries are widely used as energy storage and dynamic power,while the capacity life of battery is one of the key factors affecting its further application.The electrochemical-mechanical multi-field coupling effect of the lithium-ion batteries during the cyclic charging and discharging process cause the damage accumulation for the electrode materials,thereby deteriorates the mechanical stability of the electrode materials,leading to multi-scale damage to the electrode materials,ultimately declining the battery life.In this study,the multi-scale failure behavior of LiNi_(x)Co_(y)Mn_(z)O_(2)(NCM)cathode materials were summarized through our previous research,and the experimental and simulation analysis method for studying the damage of electrode material are introduced systematically to provide reference for selecting damage analysis methods at different scales.In addition,the failure mechanisms of NCM cathode materials at the scale of active particles and electrode coating were studied in-depth based on combination of experimental and simulated analysis,including electrochemical experimental of lithium-ion batteries,extended finite element method(XFEM),linear matching method(LMM)framework.The research work provides important guidance for the mechanism analysis of multi-scale failure behavior and microstructure modification of electrode materials.