The LiMn2O4 to λ-MnO2 phase transition studied by in situ neutron diffraction

被引：69

作者：

Berg, H

Rundlöv, H

Thomas, JO

机构：

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

[2] Studsvik Neutron Res Lab, SE-61182 Nykoping, Sweden

来源：

SOLID STATE IONICS | 2001年 / 144卷 / 1-2期

关键词：

lithium-ion battery; spinel; in situ neutron diffraction;

D O I：

10.1016/S0167-2738(01)00894-3

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：

The LixMn(2)O(4) to lambda -MnO2 phase transition, as lithium is extracted electrochemically from the spinel structure, has been studied by in situ neutron diffraction. The 'single-phase' composition around 4.1 V is found to be strongly dependent on potential, with the Li content (x) varying between 0.65(9) and 0.49(12). The amount of Li in the cubic lambda -MnO2 phase is 0.27(13) with cell parameter a = 8.115(1) Angstrom, in good agreement with earlier ex situ neutron diffraction results. A simple in situ neutron diffraction method is presented for following structural changes during electrochemical cycling of a lithium insertion compound. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：65 / 69

页数：5

共 17 条

[1] Capacity fade mechanisms and side reactions in lithium-ion batteries [J].