锂离子电池Sn负极材料的制备及性能

采用射频磁控溅射法在射频溅射功率200W、镀膜时间10min的工艺条件下制备了锂离子电池用Sn薄膜负极材料。通过XRD、SEM、ICP、恒电流充放电对薄膜材料的结构、形貌及循环性能进行了表征。结果表明，该工艺下获得的Sn薄膜只出现了一个衍射峰Sn（220），表面分布均匀细小颗粒，平均颗粒大小约500nm。薄膜电极首次嵌锂容量为751mAh／g，30次循环后，嵌锂容量保持在500mAh／g以上。

Preparation and Performance of Sn Material as Anode of Lithium ion Battery

The tin thin film as anode of lithium ion battery was fabricated by radio frequency magnetron sputtering with sputtering power of 200 W and sputtering time of 10 min. The crystal structure, morphology and cyclic performance of the films were characterized by X-ray diffraction（XRD）, scanning electron microscopy（SEM）, inductively coupled plasma atomic emission spectrometry（lCP）, the galvanostatic charge/discharge（GC） measurement. The experimental results showed that there was only one diffraction peak of tin. The small particles were distributed uniformly on the surface, with average particle diameter of 500 nm. The initial lithium insertion capacity of the Sn film electrode was 710 mAh/g and it kept more than 500 mAh/g after 30 cycles.