Pyrolytic carbon-coated silicon/Carbon Nanotube composites: promising application for Li-ion batteries
by Y. Zhang, Z.G. Zhao, X.G. Zhang, H-L. Zhang, F. Li, C. Liu, H-M. Cheng
International Journal of Nanomanufacturing (IJNM), Vol. 2, No. 1/2, 2008

Abstract: Carbon Nanotubes (CNTs) were grown on silicon nanoparticles by Chemical Vapour Deposition (CVD) method and then the as-prepared Si-CNT hybrid was coated by pyrolytic carbon through pyrolysis of sucrose, as anode material for Li-ion batteries in this study. After 20 cycles, the pyrolytic carbon coated silicon/CNT composite achieved a discharge capacity of 727 mAh/g. However, for the simple mixture of silicon and CNTs coated by a layer of pyrolytic carbon through pyrolysis of sucrose, the discharge capacity after 20 cycles was only 363 mAh/g. The CVD growth of CNTs on silicon suppresses the structure destruction of pyrolytic carbon-coated silicon/CNT composite during cycling, resulting in the improvement of cyclability.

Online publication date: Sat, 19-Apr-2008

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