期刊
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
卷 14, 期 7, 页码 1241-1246出版社
SPRINGER
DOI: 10.1007/s10008-009-0933-z
关键词
Lithium titanium oxide; Hollow spheres; Lithium ion battery; Carbon
资金
- Shaoxing University [08LG1006]
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.
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