Effect of co content on rate performance of LiMn0.5-xCo2xNi0.5-xO2 cathode materials for lithium-ion batteries

被引：134

作者：

Sun, YC ^{[1
]}

Ouyang, CY ^{[1
]}

Wang, ZX ^{[1
]}

Huang, XJ ^{[1
]}

Chen, LQ ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Nanoscale Phys & Device Lab, Beijing 100080, Peoples R China

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2004年 / 151卷 / 04期

关键词：

D O I：

10.1149/1.1647574

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Layer-structured LiMn0.5-xCo2xNi0.5-xO2 was prepared as cathode material for lithium-ion batteries. The structures of the layered materials and the oxidation states of the elements in the compounds were characterized by X-ray diffraction and X-ray photoelectron spectroscopy. Adsorbed oxygen was detected on the surface of material. With the increase of Co content in LiMn0.5-xCo2xNi0.5-xO2, the oxidation state of Ni, Mn, Co, and O became higher gradually while the amount of oxygen adsorbed on the surface of LiMn0.5-xCo2xNi0.5-xO2 grains reduced obviously. Electrochemical evaluation showed that addition of Co in LiMn0.5-xCo2xNi0.5-xO2 is beneficial to its rate performance. The variations of the electronic structure of Ni, Mn, and O may be responsible for the improvement of the rate capability in LiMn0.5-xCo2xNi0.5-xO2 with addition of Co. (C) 2004 The Electrochemical Society.

引用

页码：A504 / A508

页数：5

共 22 条

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Reed, J ;

Ceder, G .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2002, 5 (07) :A145-A148

[22] Investigation of the local structure of the LiNi0.5Mn0.5O2 cathode material during electrochemical cycling by X-ray absorption and NMR spectroscopy [J].

Yoon, WS ;

Paik, Y ;

Yang, XQ ;

Balasubramanian, M ;

McBreen, J ;

Grey, CP .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2002, 5 (11) :A263-A266

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