High capacity, surface-modified layered Li[Li(1-x)/3Mn(2-x)/3Nix/3Cox/3]O2 cathodes with low irreversible capacity loss

被引：233

作者：

Wu, Y ^{[1
]}

Manthiram, A ^{[1
]}

机构：

[1] Univ Texas, Mat Sci & Engn Program, Austin, TX 78712 USA

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2006年 / 9卷 / 05期

关键词：

D O I：

10.1149/1.2180528

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Layered Li[Li0.2Mn0.54Ni0.13Co0.13]O-2 and Li[Li0.1Mn0.43Ni0.23Co0.23]O-2 cathodes belonging to the Li[Li(1-x)/3Mn(2-x)/3Nix/3Cox/3]O-2 solid solution series between Li[Li1/3Mn2/3]O-2 and LiCo1/3Ni1/3Mn1/3O2 have been synthesized and characterized by charge-discharge measurements in lithium cells before and after modifying their surface with Al2O3. The surface-modified cathodes show significantly lower irreversible capacity loss (ICL) and higher discharge capacity with excellent cyclability compared to the unmodified counterparts. For example, surface modified Li[Li0.2Mn0.54Ni0.13Co0.13]O-2 shows a remarkably high capacity of 285 mAh/g with an ICL of 41 mAh/g and good rate capability. This capacity value is much higher than that achieved with the previously known Li[Li0.17Mn0.58Ni0.25]O-2 after similar surface modification (< 255mAh/g). (c) 2006 The Electrochemical Society.

引用

页码：A221 / A224

页数：4

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