The mechanism of side reaction induced capacity fading of Ni-rich cathode materials for lithium ion batteries

作     者：Daozhong Hu Yuefeng Su Lai Chen Ning Li Liying Bao Yun Lu Qiyu Zhang Jing Wang Shi Chen Feng Wu Daozhong Hu;Yuefeng Su;Lai Chen;Ning Li;Liying Bao;Yun Lu;Qiyu Zhang;Jing Wang;Shi Chen;Feng Wu

作者机构：School of Materials Science and EngineeringBeijing Key Laboratory of Environmental Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Beijing Institute of Technology Chongqing Innovation CenterChongqing 401120China China North Vehicle Research InstituteBeijing 100072China 

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

年 卷 期：2021年第30卷第7期

页      面：1-8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：supported by the National Key R&D Program of China(2016YFB0100301) the National Natural Science Foundation of China(21875022,51802020,U1664255) the Science and Technology Innovation Foundation of Beijing Institute of Technology Chongqing Innovation Center(2020CX5100006) the Young Elite Scientists Sponsorship Program by CAST(2018QNRC001) the support from the Beijing Institute of Technology Research Fund Program for Young Scholars 

主　　题：Lithium-ion batteries Ni-rich cathode materials LiF deposition HF erosion Failure mechanism 

摘      要：Ni-rich cathode materials show great potential of applying in high-energy lithium ion batteries,but their inferior cycling stability hinders this *** on the electrode/electrolyte interfacial reaction is indispensable to understand the capacity failure mechanism of Ni-rich cathode materials and further address this *** work demonstrates the domain size effects on interfacial side reactions firstly,and further analyzes the inherent mechanism of side reaction induced capacity decay through comparing the interfacial behaviors before and after MgO *** has been determined that LiF deposition caused thicker SEI films may not increase the surface film resistance,while HF erosion induced surface phase transition will increase the charge transfer resistance,and the later plays the dominant factor to declined capacity of Ni-rich cathode *** work suggests strategies to suppress the capacity decay of layered cathode materials and provides a guidance for the domain size control to match the various applications under different current rates.