加入收藏

联系我们
 
English
返 回 首 页
组 内 活 动
学 术 交 流
获 奖 情 况
联 系 方 式
相 关 链 接
 
 
炭 素 知 识
Carbon
新 型 炭 材 料
碳 术 语 辞 典
碳 纳 米 管
 
 
 
  Nanosize SnO2 confined in the porous shells of carbon cages for kinetically efficient and long-term lithium storage  
G. M. Zhou, D. W. Wang, L. Li, N. Li, F. Li*, H. M. Cheng
Nanoscale,5 (4), 1576-1582 [PDF文件下载]
    We explore a hybrid material consisting of SnO2 nanoparticles (NPs) embedded in the porous shells of carbon cages (SnO2-PSCC). The hybrid material exhibits improved kinetics of lithiation-delithiation and high reversible capacity, and excellent cyclic stability without capacity loss over 100 cycles at 500 mA g (1) with a coulombic efficiency close to 100% after the initial cycle. This can be ascribed to the high electrical conductivity, the hierarchical porosity and the confinement effect of the PSCC on the volume change of SnO2 NPs. The material has a large reversible capacity of 460 mA h g(-1) at a high current density of 5 A g(-1) due to a short ion diffusion length in the bulk and large number of inter-pore ion transport channels. These results provide insight into improving the lithium storage performance of SnO2 by facilitating the reaction kinetics and indicate that this hybrid material has great potential for use in high-rate and durable lithium ion batteries.
 
 
版权所有©沈阳材料科学国家(联合)实验室先进炭材料研究部 地址:沈阳市文化路72号 邮编:110016
电话:(024)23971788 83978238 传真:(024)23971215 Email:fli@imr.ac.cn