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

Min-Jeong Kim, Jin-Tak Yeon, Kijoo Hong, Sang-Ick Lee, Nam-Soon Choi, Sung-Soo Kim
2013 Bulletin of the Korean Chemical Society (Print)  
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 o C compared to non-doped soft carbon. This poor capacity retention could be improved by
more » ... ld 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.
doi:10.5012/bkcs.2013.34.7.2029 fatcat:ysjf2txkpjhhvfbv6llx6uf4he