Surface-Coated Silicon Anodes with Amorphous Carbon Film Prepared by Fullerene C[sub 60] Sputtering
| Autor: | Arenst Andreas Arie, Oleg Mikhalovich Vovk, Joong Kee Lee |
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| Rok vydání: | 2010 |
| Předmět: |
Materials science
Fullerene Silicon Renewable Energy Sustainability and the Environment Inorganic chemistry chemistry.chemical_element Sputter deposition Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials Anode Carbon film Amorphous carbon chemistry Chemical engineering Sputtering Materials Chemistry Electrochemistry Cyclic voltammetry |
| Zdroj: | Journal of The Electrochemical Society. 157:A660 |
| ISSN: | 0013-4651 |
| DOI: | 10.1149/1.3363531 |
| Popis: | Surface-coated silicon films with an amorphous carbon film are prepared by radio-frequency magnetron sputtering using the fullerene C 60 target. The carbon-coated silicon films are used as anode materials for lithium ion batteries and then investigated by the electrochemical measurements such as cyclic voltammetry and charge-discharge tests. Compared to the bare silicon anodes, the carbon-coated samples show more improvements in their electrochemical performances with a smaller irreversible capability in the first cycle and more stable cycle performance and maintain a high specific capacity of 2872 mAh g ―1 until the 50th cycle under a current density of 100 μA cm ―2 . It can be attributed to the presence of carbon film as an artificial passive layer to suppress the side reaction with the electrolyte. Additionally, the carbon layer can also provide a compressive stress, which may reduce the effect of a large volume change in silicon anodes during the charge-discharge tests, as indicated by the Raman spectroscopy recorded after the cycle tests. |
| Databáze: | OpenAIRE |
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