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Choi, Nam-Soon
Energy Materials Lab
Research Interests
  • Rechargeable lithium battery, electrolytes for next generation Mg and Na battery

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Effects of phosphorous-doping on electrochemical performance and surface chemistry of soft carbon electrodes

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Title
Effects of phosphorous-doping on electrochemical performance and surface chemistry of soft carbon electrodes
Author
Kim, Min-JeongYeon, Jin-TakHong, KijooLee, Sang-IckChoi, Nam-SoonKim, Sung-Soo
Keywords
Electrolyte; Phosphorous doping; Soft carbon; Solid electrolyte interphase; Thermal reactions
Issue Date
201307
Publisher
KOREAN CHEMICAL SOC
Citation
BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.34, no.7, pp.2029 - 2035
Abstract
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 °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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DOI
http://dx.doi.org/10.5012/bkcs.2013.34.7.2029
ISSN
0253-2964
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