Preparation of carbon blacks by liquid phase plasma (LPP) process.
In this study, carbon black nanoparticles were synthesized by Liquid Phase Plasma (LPP) technique; plasma generated in the organic solvent of benzene at 4.9 kV with the pulse frequency of 15 kHz and width of 5 micros transformed the carbon atoms in the solvent into carbon blacks by oxidation and reduction reactions. Graphite phase was found to be introduced into the carbon blacks without any additional processes due to the characteristics of LPP process, resulting in a higher G/D ratio of 0.92, compared to 0.83 of commercial Ketjen carbon blacks. For the performance improvement, heat treatment was employed and its parameters such as temperature and duration time were optimized in relation to the crystallinity and specific surface area of the carbon blacks. Carbon blacks heat treated at 450 degrees C in the air for 20 min were measured to have the discharge capacity of 1750 mAh/g and irreversible charging and discharging capacity ratio of 52.6%.
Institute/Faculty of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul, 143-747, Korea.
Kang-Seop
KS
Yun
Bo-Ra
BR
Kim
Woo-Seung
WS
Kang
Sang-Chul
SC
Jung
Seung-Taek
ST
Myung
Sun-Jae
SJ
Kim
D003460:Crystallization / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D044367:Phase Transition; D058626:Plasma Gases / Q000737:chemistry*; D012996:Solutions; D053260:Soot / Q000138:chemical synthesis*; D013499:Surface Properties
D046911:Macromolecular Substances; D058626:Plasma Gases; D012996:Solutions; D053260:Soot