Kinetics-controlled growth SnO2 nanorod arrays for superior rate performance of aligned mesocrystalline lithium-ion batteries with  

作　　者：Shuai Chen Miao Wang Jianfeng Ye Jinguang Cai Yurong Ma Henghui Zhou Limin Qi 

机构地区：[1]Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species,College of Chemistry, Peking University, Beijing 100871, China

出　　处：《Nano Research》2013年第4期243-252,共10页纳米研究（英文版）

摘　　要：A general method for facile kinetics-controlled growth of aligned arrays of mesocrystalline SnO2 nanorods on arbitrary substrates has been developed by adjusting supersaturation in a unique ternary solvent system comprising acetic acid, ethanol and water. The hydrolysis processes of Sn（IV） as well as the nucleation and growth of SnO2 crystals were carefully controlled in the mixed solvents, leading to an exclusively heterogeneous nucleation on a substrate and the subsequent growth into mesocrystalline nanorod arrays. In particular, aligned arrays of hierarchically structured, [001]-oriented mesocrystalline SnO2 nanorods with four {110} lateral facets can be readily grown on Ti foil as well as many other inert substrates such as fluoride-doped tin oxide （FTO）, Si, graphite, and polytetrafluoroethylene （Teflon）. Due to the unique combination of the mesocrystalline structure and the one-dimensional nanoarray structure, the obtained mesocrystalline SnO2 nanorod arrays grown on metallic Ti substrate exhibited an excellent rate performance with a high initial Coulombic efficiency of 65.6% and a reversible capacity of 720 mA.h/g at a charge/discharge rate of 10 C （namely, 7,820 mA/g） when used as an anode material for lithium-ion batteries.

关 键 词：tin dioxide nanostructures MESOCRYSTALS hierarchical structures lithium-ion batteries 

分 类 号：TQ936.1[化学工程] TB383[一般工业技术—材料科学与工程]