Effects of Phosphorous-doping on Electrochemical Performance and Surface Chemistry of Soft Carbon Electrodes

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 reversi...

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Published inBulletin of the Korean Chemical Society Vol. 34; no. 7; pp. 2029 - 2035
Main Authors Kim, Min-Jeong, Yeon, Jin-Tak, Hong, Kijoo, Lee, Sang-Ick, Choi, Nam-Soon, Kim, Sung-Soo
Format Journal Article
LanguageEnglish
Published 대한화학회 20.07.2013
Subjects
화학
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Summary: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 oC 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. KCI Citation Count: 14
Bibliography:G704-000067.2013.34.7.005
http://journal.kcsnet.or.kr/main/j_search/j_abstract_view.htm?code=B130718&qpage=j_search&spage=b_bkcs&dpage=ar
ISSN:0253-2964
1229-5949
DOI:10.5012/bkcs.2013.34.7.2029