O2 structure Li2/3[Ni1/3Mn2/3]O2:: A new layered cathode material for rechargeable lithium batteries III.: Ion exchange

被引：58
|
作者：
Paulsen, JM [1 ]
Larcher, D [1 ]
Dahn, JR [1 ]
机构：
[1] Dalhousie Univ, Dept Phys, Halifax, NS B3H 3J5, Canada
来源：
JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2000年 / 147卷 / 08期
关键词：
D O I：
10.1149/1.1393617
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The ion exchange of Li for Na in P2-structure Na-2/3[Ni1/3Mn2/3]O-2 to make T2-structure Li-2/3[Ni1/3Mn2/3]O-2 is studied. Electron micrographs show that the hexagonal plate-like crystal habit is preserved during ion exchange. Ion exchange is successful and equivalent using both molten salts and concentrated Li+-containing aqueous solutions. By controlling the Li:Na ratio in the ion exchange, it is possible to prepare an intermediate phase of approximate composition Li1/3Na1/3[Ni1/3Mn2/3]O-2, where filled alkali layers of Li and Na alternate, thus doubling the c axis of the material. A summary of ion-exchange reactions of Li for Na in other layered Na-bronzes, such as P3-Na-2/3[Ni1/3Mn2/3]O-2, O3-Na[Ni1/2Mn1/2]O-2, P2-Na-2/3[CoxMn1-x]O-2, P3-Na-2/3[CoxMn1-x]O-2, P2-Na2/3CoO2, P2-Na-2/3[Fe1/3Mn2/3]O-2, P2-Na-2/3[Fe2/3Mn1/3]O-2, P2-Na-2/3[Mg1/3Mn2/3]O-2. P2-Na-2/3[Ni1/3Mn2/3]O-2, and O3-NaMnO2, is given. (C) 2000 The Electrochemical Society. S0013-4651(99)12-108-6. All rights reserved.
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收藏
页码：2862 / 2867
页数：6
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