Abstract
A novel silicon core/amorphous carbon nanotube (ACNT) shell composite that can be used as lithium-ion batteries anode material was in-situ synthesized in the chemical vapor deposition (CVD) growth process. The hypothesized core/shell structure was evidenced by SEM/TEM/XRD, suggesting that the ACNTs composed of carbon clusters with short-range order and long-range disorder were successfully deposited onto the surface of the silicon particles. This Si/ACNT composite delivered a high capacity of 1496 mAh g−1 at a current density of 100 mA g−1, and a superior cycling stability with 80% capacity retention after 300 cycles. This observed specific capacity improvement of Si/ACNT composite is likely attributed to the formed three-dimensional conductive networks between silicon particles and interwoven ACNTs in the composite
Original language | English |
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Pages (from-to) | 500-507 |
Number of pages | 7 |
Journal | Journal of Alloys and Compounds |
Volume | 708 |
Early online date | 06 Mar 2017 |
DOIs | |
Publication status | Published - 25 Jun 2017 |
Keywords
- amorphous carbon nanotubes
- silicon core-shell composite
- chemical vapor deposition
- x-ray diffraction
- electron microscopy
- electrochemical properties