Effect of carbon-coated silicon/graphite composite anode on the electrochemical properties

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Abstract

The effects of carbon-coated silicon/graphite (Si/Gr.) composite anode on the electrochemical properties were investigated. The nanosized silicon particle shows a good cycling performance with a reasonable value of the first reversible capacity as compared with microsized silicon particle. The carbon-coated silicon/graphite composite powders have been prepared by pyrolysis method under argon/10 wt% propylene gas flow at 700°C for 7 h. Transmission electron microscopy (TEM) analysis indicates that the carbon layer thickness of 5 nm was coated uniformly onto the surface silicon powder. It is confirmed that the insertion of lithium ions change the crystalline silicon phase into the amorphous phase by X-ray diffraction (XRD) analysis. The carbon-coated composite silicon/graphite anode shows excellent cycling performance with a reversible value of 700 mAh/g. The superior electrochemical characteristics are attributed to the enhanced electronic conductivity and low volume change of silicon powder during cycling by carbon coating.

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APA

Hyung, S. K., Kyung, Y. C., & Byung, W. C. (2008). Effect of carbon-coated silicon/graphite composite anode on the electrochemical properties. Bulletin of the Korean Chemical Society, 29(10), 1965–1968. https://doi.org/10.5012/bkcs.2008.29.10.1965

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