Ammonium tungstate modified Li-rich Li1+xNi0.35Co0.35Mn0.30O2 to improve rate capability and productivity of lithium-ion batteries

被引：19
作者：
Aida, Taira [1 ]
Tsutsui, Yusuke [1 ]
Kanada, Satoshi [1 ]
Okada, Jiro [1 ]
Hayashi, Kazuhide [2 ]
Komukai, Tetsufumi [1 ]
机构：
[1] Sumitomo Met Min Co Ltd, Battery Res Labs, 17-3 Isoura Cho, Niihama, Ehime 7920002, Japan
[2] Sumitomo Met Min Co Ltd, Ichikawa Res Ctr, 18-5 Nakakokubun 3 Chome, Ichikawa, Chiba 2728588, Japan
来源：
JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2017年 / 21卷 / 07期
关键词：
Lithium nickel manganese cobalt oxide; Rate capability; Residual lithium compound; Ammonium tungstate; Lithium tungsten oxide; ELECTROCHEMICAL PROPERTIES; LICOO2;
D O I：
10.1007/s10008-017-3586-3
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
LiNi1-x-yCoxMnyO2 (NCM) with excessive lithium is known to exhibit high rate capability and charge-discharge cycling durability. However, the practical usage of NCM is difficult, because the positive electrode slurry is unstable and battery cells swell due to the alkaline residual lithium compound generated on the surface of NCM particles. To reduce the residual lithium compound, ammonium metatungstate (AMT) added to NCM is studied, and the effect is investigated by scanning electron microscopy, aberration-corrected scanning transmission electron microscopy, X-ray diffractometry, synchrotron X-ray diffractometry, and several electrochemical measurements. It is found that the AMT modification reduces the amount of alkaline residual lithium compound and improves the rate capability due to the similar to 1-nm-thick W-rich layer generated on the NCM surface.
引用
收藏
页码：2047 / 2054
页数：8
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