Effects of phosphorous-doping on electrochemical performance and surface chemistry of soft carbon electrodes
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- Effects of phosphorous-doping on electrochemical performance and surface chemistry of soft carbon electrodes
- Kim, Min-Jeong; Yeon, Jin-Tak; Hong, Kijoo; Lee, Sang-Ick; Choi, Nam-Soon; Kim, Sung-Soo
- Electrolyte; Phosphorous doping; Soft carbon; Solid electrolyte interphase; Thermal reactions
- Issue Date
- KOREAN CHEMICAL SOC
- BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.34, no.7, pp.2029 - 2035
- 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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