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http://dx.doi.org/10.14478/ace.2019.1015

Effects of Pitch Softening Point-based on Soft Carbon Anode for Initial Efficiency and Rate Performance  

Kim, Kyung Soo (Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology (KRICT))
Im, Ji Sun (Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology (KRICT))
Lee, Jong Dae (Department of Chemical Engineering, Chungbuk National University)
Kim, Ji Hong (Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology (KRICT))
Hwang, Jin Ung (Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology (KRICT))
Publication Information
Applied Chemistry for Engineering / v.30, no.3, 2019 , pp. 331-336 More about this Journal
Abstract
In this study, required properties and optimized procedure conditions for the pitch based soft carbon anode of lithium ion battery was investigated for improving the initial efficiency and rate performance. Each petroleum residue was thermally treated at 360, 370, and $410^{\circ}C$ for 3 hours to synthesis a pitch and the corresponding pitch shows the softening point of 86, 98, and $152^{\circ}C$, respectively. The elemental analysis and thermal characteristics of the pitch were investigated by EA analysis and TGA. It was noted that the low H/C and improved thermal stability were obtained with the high softening point. The obtained pitch was carbonized at $1,200^{\circ}C$ for 1 hour to produce a soft carbon based anode. As a result of investigating the crystal structure by XRD analysis, it was found that the crystallinity of soft carbon increased with increasing the softening point. It was considered that relatively higher boiling components and decreases in the evaporation component resulted the components participation for cyclization during the heat treatment process. The soft carbon based anode with an improved crystallinity shows the enhanced initial efficiency and rate performance. The mechanism of both improvements was also discusssed based on the developed crystal structure of soft carbon based anode materials.
Keywords
Lithium ion battery; Anode; Carbon; Pitch;
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