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

页码：100 / 103

页数：4

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