Enhanced electrochemical properties of Ni-rich LiNi0.8Co0.1Mn0.1O2 by SnO2 coating under high cutoff voltage

被引：10
作者：
Song, Liubin [1 ]
Li, Anxian [1 ]
Xiao, Zhongliang [1 ]
Chi, Zhenzhen [1 ]
Cao, Zhong [1 ]
Zhu, Huali [2 ]
机构：
[1] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Sch Chem & Food Engn, Changsha 410004, Hunan, Peoples R China
[2] Changsha Univ Sci & Technol, Sch Phys & Elect Sci, Changsha 410004, Hunan, Peoples R China
来源：
IONICS | 2020年 / 26卷 / 06期
基金：
中国国家自然科学基金;
关键词：
SnO2; LiNi0; 8Co0; 1Mn0; 1O(2); High cutoff voltage; Surface coating; CATHODE MATERIAL; CYCLING STABILITY; LITHIUM; LAYER; LINI1/3CO1/3MN1/3O2; PERFORMANCE; ELECTRODE; SURFACE; INTERFACE; OXIDE;
D O I：
10.1007/s11581-019-03430-6
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Extending the working voltage is an effective approach to enhance the reversible capacity of LiNi1-x-yCoxMnyO2 layered oxide cathode materials. However, the layered Ni-rich LiNi0.8Co0.1Mn0.1O2 cathode suffers a severe structural instability and rapid capacity decrease during high-voltage cycling (4.6 V). In order to solve these problems, the surface coating layer of SnO2 is successfully prepared via a one-step synthesis way followed with a high temperature calcination method. The 1.0% SnO2-modified LiNi0.8Co0.1Mn0.1O2 delivers a much higher capacity retention (83.63%) compared with pristine sample (71.58%) after 100 cycles at 1 C under 4.6 V. The coating properties of SnO2-coated LiNi0.8Co0.1Mn0.1O2 are probed via X-ray diffraction, scanning electron microscope, and transmission electron microscope. Our results provide a skillful approach to obtain the promising high performance of cathode materials with both high energy density and long calendar life to satisfy the growing demands of future lithium-ion battery.
引用
收藏
页码：2681 / 2688
页数：8
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