作　　者： ; ; ; ; ; ; ;

机构地区： 五邑大学机电工程学院

出　　处： 《功能材料》 2010年第12期2072-2074,2079,共4页

摘　　要： 采用射频磁控溅射方法在铜基片上制备了锡薄膜,把在两种溅射功率(200和350W)下制备的Sn薄膜制成锂离子电池电极。用X射线衍射、电子探针、扫描电镜及充放电实验研究比较了二电极的性能。结果表明,在350W的溅射功率下制备的Sn薄膜,与基底生成了锡铜合金;锡铜合金的生成提高了Sn薄膜与铜基片的结合力,因而具有更高的循环性能,其首次嵌锂比容量为707mAh/g,30次循环后,仍保持有643mAh/g的嵌锂比容量。 Tin film was deposited onto copper foil by radio frequency（RF）magnetron sputtering.Two kinds of films as negative materials for lithium-ion batteries was prepared with different RF power（200 and 350W）.Their structures and performances were studied with X-ray diffraction（XRD）,electronic probe,scanning electron microscopy（SEM）and charging-discharge experiments.The results show that the tin-copper alloy was formed with RF power at 350W,the binding force between the layers is enhanced due to the forming of alloy and it has more excellent cycle performance.Its shows better discharge capacity and cyclic stability than that was prepared by power of 200W：the discharge capacity of the RF power 350W electrode is 707mAh/g for the first cycle and keeps 643mAh/g after 30 cycles.

关 键 词： 射频磁控溅射 锡 锂离子电池 负极材料

领　　域： [电气工程] [金属学及工艺] [一般工业技术] [金属学及工艺]