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http://dx.doi.org/10.9713/kcer.2021.59.3.410

Electrochemical Performance of PFO Pitch coated Natural Graphite using Dry Speed Mixer  

Youn, Jae Woong (Department of Chemical Engineering, Chungbuk National University)
Lee, Jong Dae (Department of Chemical Engineering, Chungbuk National University)
Publication Information
Korean Chemical Engineering Research / v.59, no.3, 2021 , pp. 410-416 More about this Journal
Abstract
To improve the capacity and stability of natural graphite, the electrochemical performances were investigated by using the prepared natural graphite coated with petroleum pitch for anode materials. The pitch coated natural graphite was prepared using a dry speed mixer by adjusting the rotation speed of the mixer, time, composition of graphite and softening point of the pitch. The physical properties of the anode material were analyzed using SEM, TEM, and PSD. The electrochemical performances were investigated by cycle, C-rate, EIS and CV test. When the pitch coated natural graphite was tested in the condition of 9000 RPM, 10 wt%, 2 h, and softening point of 150 ℃, it showed the highest capacity of 324.5 mAh/g at 0.1 C and a capacity retention rate of 98.9% after 50 cycles. In the test for evaluating rate performance, the capacity retention rate (5 C/0.1 C) was 80.3% and was improved by about 1.7 times over the pristine natural graphite.
Keywords
PFO Pitch; Graphite; Dry Coating; Speed Mixer; LIB;
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