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http://dx.doi.org/10.9713/kcer.2016.54.1.16

Electrochemical Characteristics of Silicon/Carbon Composites with CNT for Anode Material  

Jung, Min zy (Department of Chemical Engineering, Chungbuk national Univ.)
Park, Ji Yong (Department of Chemical Engineering, Chungbuk national Univ.)
Lee, Jong Dae (Department of Chemical Engineering, Chungbuk national Univ.)
Publication Information
Korean Chemical Engineering Research / v.54, no.1, 2016 , pp. 16-21 More about this Journal
Abstract
Silicon/Carbon/CNT composites as anode materials for lithium-ion batteries were synthesized to overcome the large volume change during lithium alloying-de alloying process and low electrical conductivity. Silicon/Carbon/CNT composites were prepared by the fabrication processes including the synthesis of SBA-15, magnesiothermic reduction of SBA-15 to obtain Si/MgO by ball milling, carbonization of phenolic resin with CNT and HCl etching. The prepared Silicon/Carbon/CNT composites were analysed by XRD, SEM, BET and EDS. In this study, the electrochemical effect of CNT content to improve the capacity and cycle performance was investigated by charge/discharge, cycle, cyclic voltammetry and impedance tests. The coin cell using Silicon/Carbon/CNT composite (Si:CNT=93:7 in weight) in the electrolyte of $LiPF_6$ dissolved in organic solvents (EC:DMC:EMC=1:1:1 vol%) has better capacity (1718 mAh/g) than those of other composition coin cells. The cycle performance of coin cell was improved as CNT content was increased. It is found that the coin cell (Si:CNT=89:11 in weight) has best capacity retension (83%) after 2nd cycle.
Keywords
Silicon/Carbon/CNT; Anode material; Carbon nanotube; Magnesiothermic reduction; Lithium ion battery;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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