Novel Anode Material for Lithium-ion Batteries: Carbon-Coated Silicon Prepared by Thermal Vapor Decomposition

Abstract

Carbon-coated Si has been prepared by thermal vapor decomposition technique. The electrochemical behaviors of carbon-coated Si together with Si have been investigated as anode materials for lithium-ion batteries. The good cycleability of carbon-coated Si under lithiation capacity of 1200 mA h/g has been correlated with ex situ XRD patterns as well as SEM graphs.

Nano- and bulk-silicon-based insertion anodes for lithium-ion secondary cells

“…Since performance depends on the precursor used and on deposition parameters, different precursors such as polyvinylchloride, polyvinylalcohol (PVA), and pitch have been used. Using this approach, Dimov and coworkers [76][77][78][79] and Liu et al [81] prepared Si/C composites and tested their electrochemical performance as anodes. They deposited carbon on ground Si particles by TVD of benzene in a nitrogen stream using at 1000 • C. The high columbic efficiency and low irreversible capacity resulted from suppression of electrolyte decomposition by carbon coating, which was demonstrated by cyclic voltammetry.…”

Lithium-ion batteries based on carbon–silicon–graphite composite anodes

“…Results of our experiments have shown this optimization to be a promising approach, which can significantly improve the properties of the Si-based composite materials. Additionally, the authors of [46,47] also report a much better cycling performance with their carbon coated silicon and other Si-based materials.…”

Multi-layered Cu/Si nanorods and its use for lithium ion batteries

“…Moreover, the interstitial spaces among these 1D nanostructures (nanorods) are expected to restrict sintering during cycling and decrease the macroscopic mechanical stresses arising from volumetric expansion during lithiation/delithiation reactions. Furthermore, these free spaces provide large active sites to accommodate lithium (Li + ) and create an easy path for electrolyte to access the entire electrode surface while reducing polarizationwhich otherwise forms on the anode surface due to SEI (solid electrolyte interface) formation, hence improve the electrode service life eventually [10].…”