Atomic Structure of a Lithium-Rich Layered Oxide Material for Lithium-Ion Batteries: Evidence of a Solid Solution

被引：465

作者：

Jarvis, Karalee A. ^{[1
]}

Deng, Zengqiang ^{[1
]}

Allard, Lawrence F. ^{[2
]}

Manthiram, Arumugam ^{[1
]}

Ferreira, Paulo J. ^{[1
]}

机构：

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

[2] Oak Ridge Natl Lab, High Temp Mat Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA

来源：

CHEMISTRY OF MATERIALS | 2011年 / 23卷 / 16期

关键词：

Li-ion batteries; nanostructures; characterization tools; ELECTRON-DIFFRACTION; LOCAL-STRUCTURE; MICROSCOPY; LI2MNO3; STEM;

D O I：

10.1021/cm200831c

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Li[Li(0.2)Ni(0.2)Mn(0.6)]O(2), which is a cathode material for Li-ion batteries with enhanced capacity, has been examined, for the first time, with a combination of aberration-corrected scanning transmission electron microscopy (STEM), STEM computer simulations, and diffraction scanning transmission electron microscopy (D-STEM). These techniques, in combination with X-ray diffraction (XRD) and conventional electron diffraction (ED), indicate that this material is composed of a solid solution with C2/m monoclinic symmetry and multiple planar defects. In addition, we show that XRD and ED alone can give misleading information and cannot resolve the structure of these materials without the additional use of the aforementioned techniques.

引用

页码：3614 / 3621

页数：8

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