Improving the single crystal LiNi0.8Co0.1Mn0.1O2 cathode material performance by fluorine doping

被引:50
|
作者
Zhang, Pengfei [1 ]
Liu, Zhaofeng [1 ]
Ma, Ben [1 ]
Li, Ping [1 ]
Zhou, Yingke [1 ]
Tian, Xiaohui [1 ]
机构
[1] Wuhan Univ Sci & Technol, Coll Mat & Met, Inst Adv Mat & Nanotechnol, State Key Lab Refractories & Met, Wuhan 430081, Peoples R China
基金
中国国家自然科学基金;
关键词
LiNi0.8Co0.1Mn0.1O2; Fluorine doping; Cathode material; Single crystal; Lithium-ion batteries; ELECTROCHEMICAL PERFORMANCE; LINI0.6CO0.2MN0.2O2; CATHODE; OXYGEN NONSTOICHIOMETRY; RATE CAPABILITY; OXIDE CATHODE; GRADIENT;
D O I
10.1016/j.ceramint.2021.08.296
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
With the rapid popularization of new energy vehicles, the demands for high energy density power batteries and related cathode materials are becoming increasingly urgent. Layered Li-Ni-Co-Mn-O cathode materials are attracting much attention because of their high specific capacity; however, their cycling and high voltage performance need to be further improved. Herein, single crystal structure LiNi0.8Co0.1Mn0.1O2 materials, prepared using a multiple-step calcination process, are further controllably doped with fluorine to improve the Li storage performance. Fluorine doping not only improves the crystal space but also increases the Co3+ and lattice oxygen content, therefore promoting the lithium ion diffusion and crystal structure stability of layered LiNi0.8Co0.1Mn0.1O2. With an appropriate amount of fluorine doping, the LiNi0.8Co0.1Mn0.1O2 single crystal material demonstrates a remarkable specific capacity of 202.7 mAh g(-1) (0.1C) and a high capacity retention of 86.6% after 100 cycles (1.0C), higher than the control sample and promising for application in lithium-ion batteries.
引用
收藏
页码:33843 / 33852
页数:10
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