Investigations on synthesis and electrochemical performance of high performance LiNi0.8Co0.1Mn0.1O2 cathode material

被引：0
|
作者：
Cai H. [1 ]
Yuan A. [1 ]
Feng R. [1 ]
Deng Y. [1 ]
Tang H. [1 ]
Tan L. [1 ]
Sun R. [1 ]
机构：
[1] School of Materials Science and Engineering, Nanchang University, Nanchang
来源：
Tan, Long (tgoodenough@ncu.edu.cn) | 1882年 / Beijing University of Aeronautics and Astronautics (BUAA)卷 / 38期
关键词：
Cathode material; Cation mixing; LiNi[!sub]0.8[!/sub]Co[!sub]0.1[!/sub]Mn[!sub]0.1[!/sub]O[!sub]2[!/sub; Lithium ion battery; O[!sub]2[!/sub] atmorsphere;
D O I：
10.13801/j.cnki.fhclxb.20200922.005
中图分类号：
学科分类号：
摘要：
A facie solid-state route has been employed to synthesize LiNi0.8Co0.1Mn0.1O2 material with superior electrochemical performance by varying the oxygen flow rate during the calcination process, and the effect of different oxygen flow rates on the structure and electrochemical performance of LiNi0.8Co0.1Mn0.1O2 has also been investigated. It reveals that the LiNi0.8Co0.1Mn0.1O2 material synthesized under a flow rate of 0.1 L/min has the lowest degree of cation mixing among all samples and large d-space. The 0.1 L/min sample shows a discharge capacity of 174 mA·h·g−1 after 100 cycles at 1 C, corresponding to the capacity retention rate of 98.3%. A retention rate as high as 96.8% is achieved at 2 C, and good performance is also obtained in high cut-off votage test. Moreover, we confirm that low oxygen-flow rate can lead to high degree of cation mixing because of high content of Ni2+, and high oxygen-flow rate can decrease the d-spacing of LiNi0.8Co0.1Mn0.1O2 material, thereby being harmful for the Li+ intercalation/deintercalation. Copyright ©2021 Acta Materiae Compositae Sinica. All rights reserved.
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页码：1882 / 1889
页数：7
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