Nb2O5-carbon core-shell nanocomposite as anode material for lithium ion battery

作者：Li, Ge; Wang, Xiaolei^*; Ma, Xueming

来源：Journal of Energy Chemistry, 2013, 22(3): 357-362.

DOI：10.1016/s2095-4956(13)60045-5

• niobium pentoxide
• core-shell
• long cycle life
• high performance anode
• lithium ion battery

Nb2O5-carbon nanocomposite is synthesized through a facile one-step hydrothermal reaction from sucrose as the carbon source, and studied as an anode material for high-performance lithium ion battery. The structural characterizations reveal that the nanocomposite possesses a core-shell structure with a thin layer of carbon shell homogeneously coated on the Nb2O5 nanocrystals. Such a unique structure enables the composite electrode with a long cycle life by preventing the Nb2O5 from volume change and pulverization during the charge-discharge process. In addition, the carbon shell efficiently improves the rate capability. Even at a current density of 500 mA.g(-1), the composite electrode still exhibits a specific capacity of similar to 100 mAh.g(-1). These results suggest the possibility to utilize the Nb2O5-carbon core-shell composite as a high performance anode material in the practical application of lithium ion battery.

• 出版日期2013-5
• 单位华东师范大学