Bulletin of the Korean Chemical Society

  • 제34권7호
  • /
  • Pages.2029-2035
  • /
  • 2013
  • /
  • 0253-2964(pISSN)
  • /
  • 1229-5949(eISSN)
대한화학회 (Korean Chemical Society)
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Effects of Phosphorous-doping on Electrochemical Performance and Surface Chemistry of Soft Carbon Electrodes

  • Kim, Min-Jeong (Graduate School of Green Energy Technology, Chungnam National University) ;
  • Yeon, Jin-Tak (Interdisciplinary School of Green Energy, Ulsan National Institute of Science and Technology (UNIST)) ;
  • Hong, Kijoo (GS Energy, CRD Center) ;
  • Lee, Sang-Ick (GS Energy, CRD Center) ;
  • Choi, Nam-Soon (Interdisciplinary School of Green Energy, Ulsan National Institute of Science and Technology (UNIST)) ;
  • Kim, Sung-Soo (Graduate School of Green Energy Technology, Chungnam National University)
  • 투고 : 2013.01.23
  • 심사 : 2013.04.10
  • 발행 : 2013.07.20
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초록

The impact of phosphorous (P)-doping on the electrochemical performance and surface chemistry of soft carbon is investigated by means of galvanostatic cycling and ex situ X-ray photoelectron spectroscopy (XPS). P-doping plays an important role in storing more Li ions and discernibly improves reversible capacity. However, the discharge capacity retention of P-doped soft carbon electrodes deteriorated at $60^{\circ}C$ compared to non-doped soft carbon. This poor capacity retention could be improved by vinylene carbonate (VC) participating in forming a protective interfacial chemistry on soft carbon. In addition, the effect of P-doping on exothermic thermal reactions of lithiated soft carbon with electrolyte solution is discussed on the basis of differential scanning calorimetry (DSC) results.

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