Single-crystal studies of electrochemically delithiated LiMn2O4

被引：23

作者：

Björk, H ^{[1
]}

Gustafsson, T ^{[1
]}

Thomas, JO ^{[1
]}

机构：

[1] Univ Uppsala, Angstrom Lab, SE-75121 Uppsala, Sweden

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2001年 / 3卷 / 04期

关键词：

single-crystal X-ray diffraction; spinel; delithiation; Li-ion battery; superlattice; phase-transformation;

D O I：

10.1016/S1388-2481(01)00129-1

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Single-crystals of LiMn2O4 spinel have been synthesized and investigated by X-ray diffraction (XRD). On the basis of the systematic absences, the cubic space-group Fd (3) over barm was chosen with a = 8.245(4) Angstrom. The crystals were then delithiated electrochemically to three different voltages: 4.25, 4.11 and 4.10 V vs Li/Li+. The lithium-depleted single-crystals obtained at 4.25 and 4.11 V exhibited a 7 x 7 x 7 superlattice cell with a ' = 56.49(2) and 57.13(3) Angstrom, respectively. At 4.10 V, the crystals show a 3 x 3 x 3 superlattice with a " = 24.41(1) Angstrom. These superlattices can be ascribed to ordering of manganese ions with different oxidation-states. (C) 2001 Published by Elsevier Science B.V.

引用

页码：187 / 190

页数：4

共 7 条

[1] Neutron diffraction study of electrochemically delithiated LiMn2O4 spinel [J].