Synthesis of silicon and carbon nanocomposites

Synthesis of silicon and carbon nanocomposites

Reduced graphene oxide and silicon (rGO@Si) nanoflakes and carbon-coated silicon (Si@C) particles are prepared by reducing pre-synthesised GO@SiO2 and SiO2@C with magnesium powder at 650°C. These silicon and carbon nanocomposites of different sizes and thickness are tested as anodes for Li ion batte...

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Bibliographic Details
Main Author: Chua, Eng Lim.
Other Authors: School of Materials Science and Engineering
Format: Final Year Project
Language:English
Published: 2012
Subjects:
DRNTU::Engineering::Materials::Nanostructured materials
Online Access:http://hdl.handle.net/10356/48433
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Institution: Nanyang Technological University
Language: English
Description
Summary:Reduced graphene oxide and silicon (rGO@Si) nanoflakes and carbon-coated silicon (Si@C) particles are prepared by reducing pre-synthesised GO@SiO2 and SiO2@C with magnesium powder at 650°C. These silicon and carbon nanocomposites of different sizes and thickness are tested as anodes for Li ion batteries, which show high specific capacities and excellent charge-discharge cycling stability. The rGO@Si and Si@C are capable of displaying discharge capacities of >400 mAhg-1 and > 700 mAhg-1 respectively with columbic efficiency >97% during the 50th cycle at current density of 420 mA/g (0.1 C).

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