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http://dx.doi.org/10.9713/kcer.2018.56.3.320

Electrochemical Performance of Graphite/Silicon/Carbon Composites as Anode Materials for Lithium-ion Batteries  

Jo, Yoon Ji (Department of Chemical Engineering, Chungbuk National University)
Lee, Jong Dae (Department of Chemical Engineering, Chungbuk National University)
Publication Information
Korean Chemical Engineering Research / v.56, no.3, 2018 , pp. 320-326 More about this Journal
Abstract
In this study, Graphite/Silicon/Carbon (G/Si/C) composites were synthesized to improve the electrochemical properties of Graphite as an anode material of lithium ion battery. The prepared G/Si/C composites were analyzed by XRD, TGA and SEM. Also the electrochemical performances of G/Si/C composites as the anode were performed by constant current charge/discharge, rate performance, cyclic voltammetry and impedance tests in the electrolyte of $LiPF_6$ dissolved inorganic solvents (EC:DMC:EMC=1:1:1 vol%). Lithium ion battery using G/Si/C electrode showed better characteristics than graphite electrode. It was confirmed that as the silicon content increased, the capacity increased but the capacity retention ratio decreased. Also, it was shown that both the capacity and the rate performances were improved when using the Silicon (${\leq}25{\mu}m$). It is found that in the case of 10 wt% of Silicon (${\leq}25{\mu}m$), G/Si/C composites have the initial discharge capacity of 495 mAh/g, the capacity retention ratio of 89% and the retention rate capability of 80% in 2 C/0.1 C.
Keywords
Graphite; Silicon; Carbon; Anode material; Lithium ion battery;
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Times Cited By KSCI : 3  (Citation Analysis)
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