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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 60, Number 5
JKCSEZ 60(5)
October 20, 2016 
 
Title
 Physicochemical and Electrochemical Characteristics of Carbon Nanomaterials and Carbon Nanomaterial-Silicon Composites
Author
 Soo Jin Kim, Yura Hyun, Chang Seop Lee*
Keywords
 Carbon nanomaterials, Silicon composites, Chemical vapor deposition, Lithium secondary batteries, Anode material
Abstract
 In this study, the physicochemical and electrochemical properties of carbon nanomaterials and synthesized nano-carbon/ Si composites were studied. The nano-carbon/Si composites were ball-milled to a nano size and coated with pyrolytic carbon using Chemical Vapor Deposition (CVD). They were then finely mixed with respective nano-carbon materials. The physicochemical properties of samples were analyzed using Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDS), Raman spectroscopy, X-ray Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), and surface area analyzer. The electrochemical characteristics were investigated using the galvanostatic charge-discharge and cyclic voltammetry (CV) measurements. Three-electrode cells were fabricated using the carbon nanomaterials and nano-carbon/Si composites as anode materials and LiPF6 and LiClO4 as electrolytes of Li secondary batteries. Reversibility using LiClO4 as an electrolyte was superior to that of LiPF6 as the electrolyte. The initial discharge capacities of nano-carbon/Si composites were increased compared to the initial discharge capacities of nanocarbon materials.
Page
 299 - 309
Full Text
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