Preparation and electrochemical performance of monodisperse Li4Ti5O12 hollow spheres

被引:51
作者
He, Ningde [1 ]
Wang, Binshuai [1 ]
Huang, Junjie [1 ]
机构
[1] Shaoxing Univ, Coll Chem & Chem Engn, Shaoxing 312000, Peoples R China
关键词
Lithium titanium oxide; Hollow spheres; Lithium ion battery; Carbon; POLYSTYRENE LATEX; LITHIUM ION; TEMPLATES; LI1.33TI1.67O4; MICROSPHERES; COATINGS; BATTERY; ROUTE;
D O I
10.1007/s10008-009-0933-z
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Monodisperse Li4Ti5O12 hollow spheres were prepared by using carbon spheres as templates. Scanning electron microscopy images show hollow spheres that have an average outer diameter of 1.0 mu m and an average wall thickness of 60 nm. Compared with Li4Ti5O12 solids, the hollow spherical Li4Ti5O12 exhibit an excellent rate capability and capacity retention and can be charged/discharged at 10 C (1.7 A g(-1)) with a specific capacity of 100 mA h g(-1), and after 200 charge and discharge cycles at 2 C, their specific capacity remain very stable at 150 mA h g(-1). It is believed that the hollow structure has a relatively large contact surface between Li4Ti5O12 and liquid electrolyte, resulting in a better electrochemical performance at high charge/discharge rate.
引用
收藏
页码:1241 / 1246
页数:6
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