Improvement of electrochemical performance of Li[Ni0.8Co0.15Al0.05]O2 cathode materials by AlF3 coating at various temperatures

被引：65
|
作者：
Park, Byung-Chun [1 ]
Kim, Hyung-Bae [1 ]
Bang, Hyun Joo [1 ]
Prakash, Jai [2 ]
Sun, Yang-Kook [1 ]
机构：
[1] Hanyang Univ, Ctr Informat & Commun Mat, Dept Chem Engn, Seoul 133791, South Korea
[2] IIT, Dept Biol & Chem Engn, Chicago, IL 60616 USA
来源：
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2008年 / 47卷 / 11期
关键词：
D O I：
10.1021/ie0715308
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
A thin AlF(3) layer of similar to 10 nm was uniformly coated on the particle surface of Li[Ni(0.8)Co(0.15)Al(0.05)]O(2). The AlF(3) coating improved cycle performance at 55, 30, and -10 degrees C and improved storage characteristics at 60 degrees C. In studies of differential capacity (dQ/dV) versus voltage, the AlF(3)-coated Li[Ni(0.8)Co(0.15)Al(0.05)]O(2) showed little variation in redox peaks with cycling. Electrochemical impedance spectroscopy suggested that the AlF(3) coating played an important role in stabilizing the interface between the cathode and the electrolyte.
引用
收藏
页码：3876 / 3882
页数：7
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