Electrochemical reactions of lithium with Li2ZnGe and Li2ZnSi

被引：31

作者：

Alcántara, R

Tillard-Charbonnel, M

Spina, L

Belin, C

Tirado, JL

机构：

[1] Univ Cordoba, Lab Quim Inorgan, E-14071 Cordoba, Spain

[2] Univ Montpellier 2, Lab Agregats Mol & Mat Inorgan, URA 5072, F-34095 Montpellier 5, France

来源：

ELECTROCHIMICA ACTA | 2002年 / 47卷 / 07期

关键词：

lithium ion batteries; zintl phases; lithium alloys; silicon; zinc; germanium;

D O I：

10.1016/S0013-4686(01)00817-9

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Electrochemical reactions of lithium with cubic alpha-Li2ZnGe and with hexagonal Li2ZnSi have been studied. Charging a Li/alpha-Li2ZnGe battery results in lithium extraction to yield a Li1.2ZnGe composition, through a first step at ca. 0.9 V that involves a phase transition from cubic to hexagonal, and a second step at ca. 1.1 V where Ge and Zn segregation is observed. By discharge of the Li/alpha-Li2ZnGe battery, the composition Li3ZnGe is reached at 0.2 V while the cubic structure is maintained. Lithium insertion into Li2ZnSi preserves the hexagonal structure. but lithium extraction modifies the X-ray diffraction pattern. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：1115 / 1120

页数：6

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