File
Authors
Keywords
Si anode
composite active material
metal silicide
gas deposition
Li-ion battery
Abstract
Thick-film electrodes of composite active materials consisted of Si and various metal silicides, FeSi2/Si, VSi2/Si, or MmSi2/Si, were prepared by mechanical alloying followed by gas deposition for anodes of Li-ion batteries. We investigated a relationship between the performance of these electrodes and properties of the silicide, the electrical resistivity, the referential breaking strength, and the thermodynamic stability. The MmSi2/Si composite electrode exhibited superb cycling performance, where the discharge capacity of 380 mA h g-1 was maintained even at the 1000th cycle. It is suggested that thermodynamically stable MmSi2 in the composite electrode can improve the electrical conductivity of the electrode and can release the stress induced by a volumetric change of Si for a long period.
Publisher
ESG
Content Type
Journal Article
Link
ISSN・ISBN
1452-3981
Journal Title
International Journal of Electrochemical Science
Current Journal Title
International Journal of Electrochemical Science
Volume
6
Issue
6
Start Page
2246
End Page
2254
Published Date
2011-06-01
Text Version
Publisher
Rights
© 2011 by ESG (www.electrochemsci.org)
Citation
International Journal of Electrochemical Science. 2011, 6(6), 2246-2254
Department
Faculty of Engineering/Graduate School of Engineering
Language
English