Improvement of High Voltage Cycling Performances of Li[Ni1/3Co1/3Mn1/3]O2 at 55°C by a (NH4)3AlF6 Coating

被引：37

作者：

Sun, Yang-Kook ^{[1
]}

Myung, Seung-Taek ^{[3
]}

Yoon, Chong Seung ^{[2
]}

Kim, Dong-Won ^{[1
]}

机构：

[1] Hanyang Univ, Dept Chem Engn, Seoul 133791, South Korea

[2] Hanyang Univ, Div Mat Sci & Engn, Seoul 133791, South Korea

[3] Iwate Univ, Dept Chem Engn, Morioka, Iwate 0208551, Japan

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2009年 / 12卷 / 08期

关键词：

coatings; electrochemical electrodes; electrochemical impedance spectroscopy; electrolytes; lithium compounds; nitrogen compounds; secondary cells; thermal stability; transmission electron microscopy; ELECTROCHEMICAL PROPERTIES; POSITIVE ELECTRODE; CATHODE MATERIALS; ION; INTERCALATION; BATTERIES; GRAPHITE; BEHAVIOR; PITT;

D O I：

10.1149/1.3143914

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The surface of Li[Ni1/3Co1/3Mn1/3]O-2 particles was modified by a simple dry coating with (NH4)(3)AlF6 as a coating agent. The (NH4)(3)AlF6-coated Li[Ni1/3Co1/3Mn1/3]O-2 showed enhanced lithium-ion intercalation stability and thermal stability at 55 degrees C and a high cutoff voltage of 4.5 V. Electrochemical impedance spectroscopy and transmission electron microscopy showed that the (NH4)(3)AlF6 coating on the Li[Ni1/3Co1/3Mn1/3]O-2 particles played a key role in stabilizing the interface between the cathode and the electrolyte.

引用

页码：A163 / A166

页数：4

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