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Title of article :
Structural and electrochemical properties of fullerene-coated silicon thin film as anode materials for lithium secondary batteries
Author/Authors :
Arenst Andreas Arie، نويسنده , , Jin O. Song، نويسنده , , Joong Kee Lee، نويسنده ,
Issue Information :
دوهفته نامه با شماره پیاپی سال 2009
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Abstract :
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.
Keywords :
Fullerene , Coating , FTIR , Electrochemical properties
Journal title :
Materials Chemistry and Physics
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Link To Document :