Structural and electrochemical properties of fullerene-coated silicon thin film as anode materials for lithium secondary batteries
| Autor: | Arenst Andreas Arie, Jin O. Song, Joong Kee Lee |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Materials science
Fullerene Scanning electron microscope Analytical chemistry chemistry.chemical_element engineering.material Condensed Matter Physics Evaporation (deposition) Anode symbols.namesake Coating chemistry Chemical engineering engineering symbols General Materials Science Lithium Fourier transform infrared spectroscopy Raman spectroscopy |
| Zdroj: | Materials Chemistry and Physics. 113:249-254 |
| ISSN: | 0254-0584 |
| DOI: | 10.1016/j.matchemphys.2008.07.082 |
| Popis: | By performing a plasma evaporation technique, fullerene C60 was used as a coating material onto a silicon thin film anode for lithium secondary batteries. The effect of the plasma power (20 W, 100 W and 200 W) in the plasma coating process on the structural and electrochemical properties of the fullerene C60-coated silicon anode was then studied by means of Raman spectroscopy, Fourier transform infra red (FTIR) spectroscopy, scanning electron microscopy (SEM), energy dispersive X-ray (EDX) spectroscopy and charge/discharge tests. The Raman and FTIR analysis showed that the polymeric phase of fullerene C60 was formed during the deposition operation and that the fullerene monomers were polymerized to a greater extent at a high plasma power operation (200 W). Furthermore, the fullerene C60-coated silicon electrode obtained at a plasma power of 200 W exhibited excellent electrochemical performance with a specific capacity of more than 2000 mAh g−1. The stable polymeric phase of fullerene C60 was found to be the main factor enhancing the electrochemical performance of the fullerene-coated silicon anode. |
| Databáze: | OpenAIRE |
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