Hydrothermal derived Li<sub>2sub>SnO<sub>3sub>/C composite as negative electrode materials for lithium-ion batteries
- 作者：Qiufen Wang<sup>asup> ; Ying Huang<sup>asup><sup> ; sup><sup>yingh@nwpu.edu.cnsup><sup> ; sup><sup>grp2009wqf@163.comsup><sup> ; sup><sup>yuqing128@126.comsup> ; Juan Miao<sup>bsup> ; Yan Wang<sup>asup> ; Yang Zhao<sup>asup>
- 关键词：Li2SnO3/C ; Hydrothermal route ; Lithium-ion batteries ; Electrochemical properties
- 刊名：Applied Surface Science
- 出版年：2012
- 期刊代码：6_01694332
- 类别：ms
- 出版时间：1 July, 2012
- 卷：258
- 期：18
- 页码：6923-6929
- 文件大小：1307 K
摘要
Composite Li<sub>2sub>SnO<sub>3sub>/C with good cycle performance for lithium-ion batteries was synthesized by a hydrothermal route. The structure, morphology and electrochemical properties of the as-prepared materials were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), thermal gravimetric analysis (TGA) and electrochemical measurements. Results show that the length of the Li<sub>2sub>SnO<sub>3sub> nanorods are in the range of 40-60 nm while the average diameter is approximately 30 nm. Amorphous carbons are distributed among the Li<sub>2sub>SnO<sub>3sub> nanoparticles. The first discharge-charge capacities of Li<sub>2sub>SnO<sub>3sub>/C are 2045.8 mAh g<sup>鈭?sup> and 1756.6 mAh g<sup>鈭?sup>. After the 50th cycles, the capacity retained is 598.3 mAh g<sup>鈭?sup> at a constant current density of 60 mA g<sup>鈭?sup> in the voltage range of 0.05-2.0 V. The composite Li<sub>2sub>SnO<sub>3sub>/C exhibits a better electrochemical property than Li<sub>2sub>SnO<sub>3sub>.