Synthesis and electrochemical properties of Ce-doped LiNi1/3Mn1/3Co1/3O2 cathode material for Li-ion batteries

被引：30
作者：
Zhong Shengkui [1 ,2 ]
Wang You [2 ]
Liu Jiequn [1 ]
Wan Kang [1 ]
Lu Fan [1 ]
机构：
[1] Soochow Univ, Shagang Sch Iron & Steel, Suzhou 215021, Peoples R China
[2] Guilin Univ Technol, Coll Chem & Bioengn, Guilin 541004, Peoples R China
来源：
JOURNAL OF RARE EARTHS | 2011年 / 29卷 / 09期
基金：
中国国家自然科学基金;
关键词：
lithium-ion batteries; cathode materials; electrochemical characterizations; rare earths; PERFORMANCE;
D O I：
10.1016/S1002-0721(10)60562-5
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The layered material of Ce-doped LiNi1/3Mn1/3Co1/3O2 with alpha-NaFeO2 was synthesized by a co-precipitation method. X-ray diffraction (XRD) showed that Ce-doped LiNi1/3Mn1/3Co1/3O2 had the same layered structure as the undoped LiNi1/3Mn1/3Co1/3O2. The scanning electron microscopy (SEM) images exhibited that the particle size of Ce-doped LiNi1/3Mn1/3Co1/3O2 was smaller than that of the undoped LiNi1/3Mn1/3Co1/3O2. The Ce-doped LiNi1/3Mn1/3Co1/3O2 samples were investigated on the Li extraction/insertion performances through charge/discharge, cyclic voltammogram (CV), and electrochemical impedance spectra (EIS). The optimal doping content of Ce was x=0.02 in the LiNi1/3-xMn1/3Co1/3CexO2 samples to achieve high discharge capacity and good cyclic stability. The electrode reaction reversibility was enhanced, and the charge transfer resistance was decreased through Ce-doping. The improved electrochemical performances of the Ce-doped LiNi1/3Mn1/3Co1/3O2 cathode materials were attributed to the addition of Ce4+ ion by stabilizing the layer structure.
引用
收藏
页码：891 / 895
页数：5
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