Sb doped Li4Ti5O12 hollow spheres with enhanced lithium storage capability
Sb doped Li4Ti5O12 hollow spheres with enhanced lithium storage capability
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DOI：
10.1039/c6ra01831a
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发表时间：
2016-03
期刊：
影响因子：
3.9
通讯作者：
Fuyun Li;Min Zeng;Jing Li;Xiao-yang Tong;Hui Xu
中科院分区：
文献类型：
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作者：
Fuyun Li;Min Zeng;Jing Li;Xiao-yang Tong;Hui Xu
采用水热法和固相反应相结合的方法合成了Sb掺杂的Li4Ti5O12空心球。采用X射线衍射、X射线光电子能谱、扫描电子显微镜、透射电子显微镜和高分辨透射电子显微镜对Sb掺杂Li4Ti5O12空心球进行了表征。结果表明，成功合成了Sb掺杂的Li4Ti5O12空心球，Sb离子均匀地分散在Li4Ti5O12晶格中，没有改变Li4Ti5O12的结构。恒电流充放电和电化学阻抗谱等电化学测试结果表明，Sb掺杂Li4Ti5O12空心球在高电流密度下仍具有良好的可逆容量和循环性能。
In this work, the Sb doped Li4Ti5O12 hollow spheres were synthesized by a combination of a hydrothermal method and a solid state reaction. The Sb doped Li4Ti5O12 hollow spheres were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy and high-resolution transmission electron microscopy. These indicated that Sb doped Li4Ti5O12 hollow spheres were synthesized successfully and Sb ions were uniformly dispersed into the Li4Ti5O12 lattice without changing the structure of Li4Ti5O12. The electrochemical measurements, including constant current charge–discharge and electrochemical impedance spectroscopy, demonstrated that the Sb-doped Li4Ti5O12 hollow spheres showed an excellent reversible capacity and remarkable cycling performance, even under conditions of high current densities.