Observation of phase transformations in LiMn2O4 under high pressure and at high temperature by in situ X-ray diffraction measurements

被引：14

作者：

Darul, J. ^{[1
]}

Nowicki, W. ^{[1
]}

Lathe, C. ^{[2
]}

Piszora, P. ^{[1
]}

机构：

[1] Adam Mickiewicz Univ, Dept Chem Mat, PL-60780 Poznan, Poland

[2] GFZ German Res Ctr Geosci, Helmholtz Ctr Potsdam, D-14473 Potsdam, Germany

来源：

RADIATION PHYSICS AND CHEMISTRY | 2011年 / 80卷 / 10期

关键词：

High pressure; High temperature; Powder X-ray diffraction; Phase transition; Lithium-manganese oxides; LiMn2O4; THERMAL-STABILITY; SPINEL; 1ST-PRINCIPLES;

D O I：

10.1016/j.radphyschem.2011.02.011

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：

This work presents the diffraction features of lithium-manganese oxide in extreme pressure and temperature conditions used as positive electrode materials in lithium-ion batteries. Energy-dispersive X-ray diffraction yield reliable description of material lattice, its distortion and chemical stability under high pressure and at high temperature (HP/HT). The phase evolution as a function of pressure and temperature is reported and analyzed in the LiMn2O4 sample. A comparison with another tetragonal spinel shows the influence of the Jahn-Teller effect on the HP/HT structure of this class of materials. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：1014 / 1018

页数：5

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