High electrochemical performance of lithium-rich Li1.2Mn0.54NixCoyO2 cathode materials for lithium-ion batteries

被引：14
|
作者：
Zhang, Linsen [1 ]
Wang, Huan [1 ]
Wang, Lizhen [1 ]
Fang, Hua [1 ]
Li, Xiaofeng [1 ]
Gao, Haili [1 ]
Zhang, Aiqin [1 ]
Song, Yanhua [1 ]
机构：
[1] Zhengzhou Univ Light Ind, Sch Mat & Chem Engn, Henan Prov Key Lab Surface & Interface Sci, Zhengzhou 450002, Peoples R China
来源：
MATERIALS LETTERS | 2016年 / 185卷
关键词：
Lithium-rich; Energy storage and conversion; Aerogel; Sintering; Lithium-ion battery; Electrochemical performance; CAPACITY; CELLS;
D O I：
10.1016/j.matlet.2016.08.118
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Li1.2Mn0.54Ni0.195Co0.065O2 (x+y=0.26, and x:y=1:1, 1:2, 2:1, 1:3, 3:1) was synthesized by aerogel with urea as chelating agent. The physical and electrochemical properties of the cathode materials were investigated through X-ray diffraction, scanning electron microscopy, cyclic voltammetry, and electrochemical impedance spectroscopy analyses as well as and charge/discharge tests. Results showed that samples with different Ni/Co ratios crystallized well and showed a layered structure. The sample, Li1.2Mn0.54Ni0.195Co0.065O2 (x:y=3:1), delivered a high discharge capacity of 313 mA h g(-1) at 20 mA g(-1) and exhibited excellent cycle performance after 50 cycles, with a capacity of 247 mA h g(-1) at 100 mA g(-1). (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：100 / 103
页数：4
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