Preparation and cycle performance at high temperature for Li[Ni0.5Co0.2Mn0.3]O2 coated with LiFePO4

被引：36

作者：

Kim, S. -B. ^{[2
]}

Lee, K. J. ^{[2
]}

Choi, W. J. ^{[2
]}

Kim, W. -S. ^{[2
]}

Jang, I. C. ^{[1
]}

Lim, H. H. ^{[1
]}

Lee, Y. S. ^{[1
]}

机构：

[1] Chonnam Natl Univ, Fac Appl Chem Engn, Kwangju 500757, South Korea

[2] Daejung EM Co LTD, Inchon 405820, South Korea

来源：

JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2010年 / 14卷 / 06期

关键词：

Li[Ni-0.Co-5(0).Mn-2(0).(3)]O-2 center dot Li[Ni-0.Co-5(0).Mn-2(0).(3)]O-2 coated with LiFePO4; High temperature performance; Cathode material; Lithium secondary battery; CATHODE MATERIALS; ELECTROCHEMICAL PERFORMANCE;

D O I：

10.1007/s10008-009-0873-7

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Li[Ni0.5Co0.2Mn0.3]O-2 coated with LiFePO4 was synthesized by a co-precipitation method. It consisted of the parent Li[Ni0.5Co0.2Mn0.3]O-2 as the core and the LiFePO4 as the coating material, with an average particle diameter of 500 nm. The LiFePO4-coated Li[Ni0.5Co0.2Mn0.3]O-2 showed no large initial capacity drop in the first cycle, which generally occurred with cathode materials bearing inactive coating layers such as Al2O3, ZnO, and MgO. Furthermore, it presented a remarkably improved cycle retention rate of over 89% until 400 cycles at 50 A degrees C. We suggest that the LiFePO4 coating technique is a very effective tool to improve the cycle performance of Li[Ni0.5Co0.2Mn0.3]O-2 at high temperatures.

引用

页码：919 / 922

页数：4

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