文献类型：期刊文献

英文题名：Fracture mechanisms of NCM polycrystalline particles in lithium-ion batteries: A review

作者：Mao, Kexin[1];Yao, Yiming[1];Chen, Ying[1];Li, Wei[2];Shen, Xiaojie[2];Song, Jinyang[2];Chen, Haofeng[1,3];Luan, Weiling[1];Wu, Kai[2]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Adv Battery Syst & Safety CPCIF, Shanghai 200237, Peoples R China;[2]Contemporary Amperex Technol Co Ltd, Ningde 352100, Peoples R China;[3]Univ Strathclyde, Dept Mech & Aerosp Engn, Glasgow City G1 1XJ, Scotland

年份：2024

卷号：84

外文期刊名：JOURNAL OF ENERGY STORAGE

收录：;EI(收录号：20240715538814);WOS:【SCI-EXPANDED(收录号:WOS:001182744300001)】；

基金：The authors gratefully acknowledge the support from the National Natural Science Foundation of China (52375144, 52375145 and 52205153) , China Postdoctoral Science Foundation (2022M721138 and 2023T160216) and Shanghai Pujiang Programme (23PJD019) during the course of this work.

语种：英文

外文关键词：NCM polycrystalline particles; Damage; Fracture; Lithium -ion batteries

摘要：The development of high-energy LiNixCoyMnzO2 (NCM) cathode materials for lithium-ion batteries (LIBs) is central to many emerging technologies in the fields of power and energy storage. However, the limited cycle life of batteries caused by electrochemical and mechanical damage of NCM polycrystalline particles remains a crucial barrier to their applications. During the charging and discharging of batteries, the insertion and extraction of lithium-ions within the active particles induce diffusion-induced stresses, resulting in the fracture of NCM particles, which ultimately leads to a decline in the overall battery performance. In this review, the fracture mechanisms of NCM polycrystalline particles are systematically summarized, and the internal and intergranular defects in primary particles are comprehensively discussed, including dislocations, nanoscale pores, cation mixing oxygen vacancies grain boundaries and porosity. The influences of stress concentration, which occurs due to phase transitions, changes in the crystal structure and anisotropic volume variations during the insertion and extraction of lithium-ions, are also summarized in this work. These factors are the key to the initiation and propagation processes of intergranular and intragranular cracks in NCM polycrystalline particles. Finally, this review also aims to address the observation methods and existing research gaps related to the fracture damage mechanisms of NCM polycrystalline particles, which provide further assistance for the optimization design of NCM cathode materials and the precise prediction of battery performance degradation.