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Korean Carbon Society (한국탄소학회)
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Preparation and Characterization of Pitch/Cokes Composite Anode Material for High Power Lithium Secondary Battery

  • Yu, Lan (Dept. of Materials Science and Engineering, Myongji University) ;
  • Kim, Ki-Jung (Dept. of Materials Science and Engineering, Myongji University) ;
  • Park, Dae-Yong (Dept. of Chemical Engineering, Myongji University) ;
  • Kim, Myung-Soo (Dept. of Chemical Engineering, Myongji University) ;
  • Kim, Kab-Il (Dept. of Electrical Engineering, Myongji University) ;
  • Lim, Yun-Soo (Dept. of Materials Science and Engineering, Myongji University)
  • Received : 2008.06.13
  • Accepted : 2008.08.29
  • Published : 2008.09.30
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Abstract

Petroleum pitch and coke with wet mixture method or with dry mixture method were investigated to develop the composite anodic carbon material of high power lithium ion battery. Cokes coated with pitch were obtained by the heat treatment of mixture of cokes and pitch with different weight ratios at $800{\sim}1200^{\circ}C$. The charge and discharge characteristic of the consequent composite anodic carbon material assembled in batteries was tested. Cokes with wet mixture method have a smooth surface and their capacity changed little with changing temperature and content as compared to the cokes with dry mixture method. Although the reversible capacities showed different values by the anode manufacturing method, the composite anode with the mixture of 20 wt% of petroleum pitch and 80 wt% of coke showed the higher power capability and initial efficiency than the pitch based anode. However, the reversible capacity of the composite anode showed the reduced value as compared with the pitch based anode.

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