Multiscale strain alleviation of Ni-rich cathode guided by in situ environmental transmission electron microscopy during the solid-state synthesis

作     者：Fengyu Zhang Yunna Guo Chenxi Li Tiening Tan Xuedong Zhang Jun Zhao Ping Qiu Hongbing Zhang Zhaoyu Rong Dingding Zhu Lei Deng Zhangran Ye Zhixuan Yu Peng Jia Xiang Liu Jianyu Huang Liqiang Zhang Fengyu Zhang;Yunna Guo;Chenxi Li;Tiening Tan;Xuedong Zhang;Jun Zhao;Ping Qiu;Hongbing Zhang;Zhaoyu Rong;Dingding Zhu;Lei Deng;Zhangran Ye;Zhixuan Yu;Peng Jia;Xiang Liu;Jianyu Huang;Liqiang Zhang

作者机构：School of New Energy and MaterialsChina University of Petroleum BeijingBeijing 102249China Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066004HebeiChina School of Materials Science and EngineeringBeihang UniversityBeijing 100191China Sichuan New Energy Vehicle Innovation CenterYibin 644000SichuanChina School of Materials Science and EngineeringXiangtan UniversityXiangtan 411105HunanChina Peking University Institute of Advanced Agricultural SciencesShandong Laboratory of Advanced Agricultural Sciences at WeifangWeifang 261000ShandongChina China Oil&Gas Pipeline Network Corporation Department of EngineeringBeijing 100026China Hebei Key Laboratory of Applied ChemistryCollege of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004HebeiChina Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of EducationSchool of Materials Science and EngineeringXiangtan UniversityXiangtan 411105HunanChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2023年第84卷第9期

页      面：467-475页

核心收录：

学科分类：081702[工学-化学工艺] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 

基　　金：the funding support from the National Natural Science Foundation of China (Nos. 52022088, 51971245, 51772262, U20A20336, 21935009) the National Key R&D Program of China (No. 2022YFB2404300, 2022YFE0207900) the Natural Science Foundation of Hebei Province (No. F2021203097, B2020203037) the China Postdoctoral Science Foundation (Grant number 2021M702756) the Sichuan Science and Technology Program and Science and Technology Planning Project of Yibin Sanjiang New Area (2022JBGS002, 2022ZYD0125, 23QYCX0034, 2021ZYGY022) 

主　　题：Ni-rich cathode In situ ETEM Solid-state synthesis Multiscale strain alleviation 

摘      要：Ni-rich layered oxides are one of the most promising cathode materials for Li-ion batteries due to their high energy ***,the chemomechanical breakdown and capacity degradation associated with the anisotropic lattice evolution during lithiation/delithiation hinders its practical ***,by utilizing the in situ environmental transmission electron microscopy(ETEM),we provide a real time nanoscale characterization of high temperature solid-state synthesis of LiNi_(0.8)CO_(0.1)Mn_(0.1)O_(2)(NCM811) cathode,and unprecedentedly reveal the strain/stress formation and morphological evolution mechanism of primary/second ary particles,as well as their influence on electrochemical *** show that stress inhomogeneity during solid-state synthesis will lead to both primary/secondary particle pulverization and new grain boundary initiation,which are detrimental to cathode cycling stability and rate *** to alleviate this multiscale strain during solid-state synthesis,we introduced a calcination scheme that effectively relieves the stress during the synthesis,thus mitigating the primary/secondary particle crack and the detrimental grain boundaries formation,which in turn improves the cathode structural integrity and Li-ion transport kinetics for long-life and high-rate electrochemical *** work remarkably advances the fundamental understanding on mechanochemical properties of transition metal oxide cathode with solid-state synthesis and provides a unified guide for optimization the Ni-rich oxide cathode.