In situ X-ray diffraction study of the lithium excess layered oxide compound Li[Li0.2Ni0.2Mn0.6]O2 during electrochemical cycling

被引：58

作者：

Fell, Christopher R. ^{[1
]}

Chi, Miaofang ^{[2
]}

Meng, Ying Shirley ^{[1
,3
]}

Jones, Jacob L. ^{[1
]}

机构：

[1] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA

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

[3] Univ Calif San Diego, Dept NanoEngn, La Jolla, CA 92037 USA

来源：

SOLID STATE IONICS | 2012年 / 207卷

基金：

美国国家科学基金会;

关键词：

Lithium ion battery; In situ X-ray diffraction; Cathode; LINI0.5MN0.5O2 CATHODE MATERIAL; ION BATTERIES; LI; ABSORPTION; LI2MNO3;

D O I：

10.1016/j.ssi.2011.11.018

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：

In situ X-ray diffraction patterns were collected using a laboratory X-ray diffractometer during the first electrochemical charge/discharge cycle of the layered lithium excess compound Li[Li0.2Ni0.2Mn0.6]O-2 in the family of Li[NixLi1/3-2x/3Mn2/3-x/3]O-2 (x=1/5). Dynamic changes in peak positions, lattice parameters, and microstrain help to explain the lithium de-intercalation mechanism in this class of materials. Strong anisotropy is observed in the shifts of the lattice parameters during the first cycle. The in situ electrochemical measurement shows dynamically changing strain during the first electrochemical cycle that is explained by known lithium and transition metal (TM) migration mechanisms. Published by Elsevier B.V.

引用

页码：44 / 49

页数：6

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