摘要
The nanocomposites Li 2 SnO 3 /polyaniline (Li 2 SnO 3 /PANI) have been synthesized by a micro emulsion polymerization method. The structure, morphology and electrochemical properties of the as-prepared materials are characterized by XRD, FTIR, Raman, XPS, TGA, TEM and electrochemical measurements. Results show that Li 2 SnO 3 /PANI nanocomposites are composed of uniform and blocky nano-sized particles (40-50 nm) with clear lattice fringes. Electrochemical measurement suggests that Li 2 SnO 3 /PANI exhibits better cycling properties and lower initial irreversible capacities than Li 2 SnO 3 as negative electrodes materials for lithium-ion batteries. At a current density of 60 mA g -1 in the voltage about 0.05-2.0 V, the initial irreversible capacity of Li 2 SnO 3 /PANI is 563 mAh g -1 while it is 687.5 mAh g -1 to Li 2 SnO 3 . The capacity retained of Li 2 SnO 3 /PANI (569.2 mAh g -1 ) is higher than that of Li 2 SnO 3 (510.2 mAh g -1 ) after 50 cycles. The PANI in the Li 2 SnO 3 /PANI nanocomposites can buffer the released stress caused by the drastic volume variation during the alloying/de-alloying process of Li-Sn.
| 源语言 | 英语 |
|---|---|
| 页(从-至) | 9896-9901 |
| 页数 | 6 |
| 期刊 | Applied Surface Science |
| 卷 | 258 |
| 期 | 24 |
| DOI | |
| 出版状态 | 已出版 - 1 10月 2012 |
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