Korean Journal of Chemical Engineering

The Korean Institute of Chemical Engineers (한국화학공학회)
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Electrochemical characteristics of silicon coated graphite prepared by gas suspension spray method for anode material of lithium secondary batteries

  • Lee, Jung-Ki ;
  • Jeon, Bup-Ju (Korea Institute of Science and Technology) ;
  • Kang, Sung-Won (Korea Institute of Science and Technology)
  • 이중기 (한국과학기술연구원) ;
  • 전법주 (한국과학기술연구원) ;
  • 강성원 (한국과학기술연구원)
  • Published : 20060000
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Abstract

graphite particles were first coated with silicon precursor containing solution by gas suspension spray method and thencalcined at heat treatment temperature at 500oC under hydrogen atmosphere. The silicon-coated graphite showed highspecific capacity and good cycle performance due to the formation of amorphous silicon-carbon black composite layeron the surface of the graphite particles. It has stable structure under repeated volume expansion and contraction. Thesilicon-coated graphite still has high irreversible capacity due to the solid electrolyte interface (SEI) formation duringthe 1st cycle. However, the capacity loss could be lessened to a certain level by controlling the composition of the sol-vent mixture in the electrolyte.

Keywords

References

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