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
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
收藏
页码:A163 / A166
页数:4
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