期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 3, 页码 2806-2814出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b13028
关键词
lithium-ion batteries; silicon nanocone; carbon coating; solid-electrolyte interphase; electrochemical performance
资金
- Ministry of Science and Technology of China [2016YFB0100500, 2016YFA200803, 2016YFA200402]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA09010102, XDB07020200]
- National Natural Science Foundation of China [91323304, 11674387, 11574369, 52315206, 51502334]
Nanotechnology and carbon coating have been applied to silicon anodes to achieve excellent lithium-ion batteries, but the exclusive influence of carbon coating on solid-electrolyte interphase (SEI) formation is difficult to exhibit distinctly because of the impurity and morphological irregularity of most nanostructured anodes. Here, we design a silicon nanocone-carbon (SNC-C) composite structure as a model anode to demonstrate the significant influences carbon coating on SEI formation and electrochemical performance, unaffectedly as a result of pure electrode component and distinctly due to regular nanocone morphology. As demonstrated by morphological and elemental analysis, compared to the SNC electrode, the SNC-C electrode maintains a thinner SEI layer (similar to 10 nm) and more stable structure during cycling as well as longer cycle life (>725 cycles), higher Coulombic efficiency (>99%), and lower electrode polarization. This well-defined structure clearly shows the interface stability attributed to carbon coating and is promising in fundamental research of the silicon anode.
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