One-Step Synthesis of Hierarchical SnO2 Hollow Nanostructures via Self-Assembly for High Power Lithium Ion Batteries
One-Step Synthesis of Hierarchical SnO2 Hollow Nanostructures via Self-Assembly for High Power Lithium Ion Batteries
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DOI：
10.1021/jp100224x
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发表时间：
2010-04
影响因子：
3.7
通讯作者：
Xiaoming Yin;Chengchao Li;Ming Zhang;Quanyi Hao;Shuang Liu;Libao Chen;Taihong Wang
中科院分区：
文献类型：
--
作者：
Xiaoming Yin;Chengchao Li;Ming Zhang;Quanyi Hao;Shuang Liu;Libao Chen;Taihong Wang
本文报道了一种简单的无模板法制备具有中空结构的分级SnO 2纳米结构。这些高孔结构，直径约200 nm，组装的纳米片。随时间变化的实验表明，这些分层且中空的纳米结构是由纳米颗粒组成的固体SnO 2球体转变而来的。此外，分级SnO 2作为锂离子电池的负极材料表现出高容量和优异的循环性能，其可以提供高达50次循环的545 mA h g-1的可逆容量。即使在高倍率下，电极也表现出优异的性能;在1.6和10 C的倍率下，可逆容量约为590和460 mA h g−1。电化学性能的提高主要归因于其比表面积增大、结构稳定性增强以及锂离子和电子的扩散距离缩短。
This paper reported a simple template-free route to prepare hierarchical SnO2 nanostructures with hollow interiors. These high porous architectures, with the diameter about 200 nm, were assembled by nanosheets. Time-dependent experiments illustrated that these hierarchical and hollow nanostructures were transformed from solid SnO2 spheres composed of nanoparticles. Furthermore, the hierarchical SnO2 manifested high capacities and excellent cycle performances as the anode materials for lithium ion batteries, which can deliver a reversible capacity of 545 mA h g−1 up to 50 cycles. Even at high rates, the electrode exhibited excellent properties; the reversible capacities were about 590 and 460 mA h g−1 at the rate of 1.6 and 10 C. The improved electrochemical properties could be ascribed to the large surface area, enhanced structure stability, and short diffusion length for both lithium ion and electron.