Structural in-situ study of Li intercalation in Li1+αMn2-αO4 spinel-type oxides

被引：17

作者：

Le Cras, F

Anne, M

Bloch, D

Strobel, P

机构：

[1] CNRS, Lab Cristallog, F-38042 Grenoble 9, France

[2] CEA, LSE, SPCM, DEM, F-38054 Grenoble, France

来源：

SOLID STATE IONICS | 1998年 / 106卷 / 1-2期

关键词：

lithium intercalation; spinels; manganese oxide; X-ray diffraction;

D O I：

10.1016/S0167-2738(97)00490-6

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：

Spinel oxides with compositions LiMn2O4 and Li1.23Mn1.77O4 were studied using an air-tight electrochemical lithium cell mounted on an X-ray powder diffractometer. The combination of electrochemical and X-ray data unambiguously shows the appearance of a tetragonal phase as soon as lithium intercalation in the host oxide begins. The lithium intercalation reaction is found to be two-phase for both oxide hosts, in spite of the high initial manganese oxidation state in Li1.23Mn1.77O4 (+ 3.82), which lies well above the expected Jahn-Teller distortion limit(+ 3.5). The tetragonal distortion is much stronger in lithiated Li2Mn2O4 than in Li1.23+xMn1.77O4.

引用

页码：1 / 10

页数：10