期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 21, 期 44, 页码 17960-17966出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1jm13158c
关键词
-
资金
- Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Korea government Ministry of Knowledge Economy [2008EEL11P070000]
A new chemical approach for obtaining excellent cycleability of natural graphite is designed and introduced for use as an anode in lithium ion batteries. Here, we evaluate the electrochemical properties of natural graphite after surface modification with ammonium hexafluorophosphate (NH(4)PF(6)) to elucidate a correlation between surface structure and its electrochemical performance. The outstanding cyclic retention of 94.9% was obtained by NH(4)PF(6) at the fiftieth cycle, even without the functional additives such as vinylene carbonate (VC) and fluoroethylene carbonate (FEC). Such improvement could be attributed to the introduction of phosphorus into the surface of natural graphite. The electrochemical measurements combined with structural analyses indicate that the phosphorus incorporation could make the surface more stable and reinforce the SEI during cycles. Our findings indicate that surface modification by phosphorus incorporation is effective to modify the physicochemical properties of the SEI and improve the electrochemical properties of natural graphite.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据