Nb_2O_5-carbon core-shell nanocomposite as anode material for lithium ion battery

作     者：Ge Li Xiaolei Wang Xueming Ma 

作者机构：Department of PhysicsEast China Normal University Department of Chemical and Biomolecular EngineeringUniversity of CaliforniaLos AngelesCA 90095United States 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2013年第22卷第3期

页      面：357-362页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：supported by Nano Special Plan from Shanghai Municipal Science and Technology Plan of Commission(No.l052nm06900) 

主　　题：niobium pentoxide core-shell long cycle life high performance anode lithium ion battery 

摘      要：Nb2O5-carbon nanocomposite is synthesized through a facile one-step hydrothermal reaction from sucrose as the carbon source, and stuclled 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 ~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.