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http://dx.doi.org/10.9713/kcer.2018.56.6.798

Electrochemical Characteristics of Si/PC/CNF/PC Composite for Anode Material of Lithium ion Battery  

Jeon, Do-Man (EG CORPORATION)
Na, Byung-Ki (Department of Chemical Engineering, Chungbuk National University)
Rhee, Young-Woo (Department of Chemical Engineering and Applied Chemistry, Chungnam National University)
Publication Information
Korean Chemical Engineering Research / v.56, no.6, 2018 , pp. 798-803 More about this Journal
Abstract
In order to use Si as an anode material for lithium-ion battery, the particle size was controlled to less than $0.5{\mu}m$ and carbon was coated on the surface with the thickness less than 10 nm. The carbon fiber was grown on the Si surface with 50~150 wt%, and the carbon coating was carried out once again. The Si composite material was mixed with dissimilar metals to increase the conductivity, and graphite was mixed to improve cyclic life characteristics. The physical and electrochemical characteristics of composite materials were measured with XRD, SEM, TEM and coin cell. The discharge capacity of Si/PC/CNF/PC was lower than that of Si/PC (Pyrolytic Carbon)/CNF (Carbon Nano Fiber). However, the cyclic life of Si/PC/CNF/PC was higher. Initial discharge capacity of 1512 mA h g-1 at 0.2 C rate and initial efficiency of 78% were shown. It also showed a capacity retention of 94% in 10 cycles.
Keywords
Secondary battery; Anode material; Silicon; Graphite; Blending;
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Times Cited By KSCI : 3  (Citation Analysis)
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