摘要
Nanostructured SnO 2, SnO 2-graphite, and Sn-graphite composites were prepared by microemulsion techniques using Tergitol 15-S-5 as the surfactant. The particle size of the pristine SnO 2 nanoparticles was typically between 12 and 14 nm. For the composites, Sn and SnO 2 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 SnO 2 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.
原文 | English |
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期刊 | Journal of the Electrochemical Society |
卷 | 151 |
發行號 | 4 |
DOIs | |
出版狀態 | Published - 2004 5月 7 |
All Science Journal Classification (ASJC) codes
- 電子、光磁材料
- 可再生能源、永續發展與環境
- 表面、塗料和薄膜
- 電化學
- 材料化學