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

Bulletin of the Korean chemical society

Kijoo Hong¹  Sang-Ick Lee¹  Nam-Soon Choi¹  Jin-Tak Yeon¹  Sung-Soo Kim¹  Min-Jeong Kim¹ 

关键词: Soft carbon;    Phosphorous doping;    Solid electrolyte interphase;    Electrolyte;    Thermal reactions;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

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.

【 授权许可】

Unknown