Microemulsion syntheses of Sn and SnO2-graphite nanocomposite anodes for Li-ion batteries

被引：54

作者：

Wang, Y ^{[1
]}

Lee, JY ^{[1
]}

Chen, BH ^{[1
]}

机构：

[1] Natl Univ Singapore, Dept Environm Chem & Engn, Singapore 119260, Singapore

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2004年 / 151卷 / 04期

关键词：

D O I：

10.1149/1.1647571

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Nanostructured SnO2, SnO2-graphite, and Sn-graphite composites were prepared by microemulsion techniques using Tergitol 15-S-5 as the surfactant. The particle size of the pristine SnO2 nanoparticles was typically between 12 and 14 nm. For the composites, Sn and SnO2 nanoparticles 7-10 nm in size with narrow size distribution were uniformly dispersed on graphite, indicating the positive effect of graphite in maintaining smaller particle size. These Sn-based nanocomposites are multiple Li host systems with good cycling performance in Li-ion battery applications. The improved cyclability is perceived to be a combination of the use of well dispersed Sn or SnO2 nanoparticles resistant to particle agglomeration, and the presence of a soft graphite matrix to buffer the volume changes in the Li-Sn reactions. In addition, the Sn-graphite nanocomposites exhibited a SnO-shell-Sn-core structure and slightly lower first cycle capacity losses. (C) 2004 The Electrochemical Society.

引用

页码：A563 / A570

页数：8

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