期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 20, 期 11, 页码 3192-3197出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201303702
关键词
anode materials; hierarchical nanostructures; ion batteries; mesoporous materials; sodium
资金
- Australian Research Council (ARC) through the ARC FT project [FT110100800]
- ARC [DP1093855]
Mesoporous SnO microspheres were synthesised by a hydrothermal method using NaSO4 as the morphology directing agent. Field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM) analyses showed that SnO microspheres consist of nanosheets with a thickness of about 20nm. Each nanosheet contains a mesoporous structure with a pore size of approximately 5nm. When applied as anode materials in Na-ion batteries, SnO microspheres exhibited high reversible sodium storage capacity, good cyclability and a satisfactory high rate performance. Through ex situ XRD analysis, it was found that Na+ ions first insert themselves into SnO crystals, and then react with SnO to generate crystalline Sn, followed by Na-Sn alloying with the formation of crystalline NaSn2 phase. During the charge process, there are two slopes corresponding to the de-alloying of Na-Sn compounds and oxidisation of Sn, respectively. The high sodium storage capacity and good electrochemical performance could be ascribed to the unique hierarchical mesoporous architecture of SnO microspheres.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据