锂离子蓄电池锡基复合负极材料的研究  

Synthesis and study of highly dispersed tin and tin-cobalt alloy composite anode materials for Li-ion batteries

作　　者：郑颖[1] 张宗双[1] 努丽燕娜[1] 王久林[1] 杨军[1] 

机构地区：[1]上海交通大学化学化工学院,上海200240

出　　处：《电源技术》2006年第8期645-648,共4页Chinese Journal of Power Sources

基　　金：国家"863"计划资助项目(2002AA302401)

摘　　要：分别采用金属镁粉和铝粉作还原剂在高能球磨条件下还原锡的氧化物,得到纳米分散的锡、锡钴合金(添加适量金属钴粉)-氧化物嵌锂复合材料。通过X射线衍射分析确定了纳米高分散锡和锡钴合金复合材料的结构,电化学测试结果表明,高分散锡和锡钴合金材料与锡的氧化物相比有更高的首次循环充电效率和更好的循环稳定性。同时,改变粘结剂种类和用量也会对材料的电化学性能产生较大的影响。其中以铝为还原剂,使用LA132粘结剂的电极可逆充电比容量超过560mAh·g-1,首次循环充电效率约为68.9%,30次循环后充电比容量保持在400mAh·g-1。良好的电化学性能表明高分散锡和锡钴合金复合材料有望成为锂离子蓄电池负极材料。Highly dispersed tin/oxide and tin-cobalt alloy/oxide composites were synthesized via the reduction of tin oxides by aluminum or magnesium under high-energy ball-milling. X-ray diffraction analysis characterizes the microstructure of the alloy composite materials, The results from electrochemical Li-insertion and extraction reveal that highly dispersed tin and tin-cobalt alloys have higher faradic yield at the first cycle and better cycle performance than pure tin oxides, On the other hand, it is found that influence of binder type and content on the electrode performance is remarkable. Reversible capacity of the electrode with aluminum reductant containing LA 132 binder （w = 5%） is above 560 mAh.g^-1 and charge efficiency is about 68.9% at the first cycle,about 400 mAh.g^-1 after 30 cycles. The good electrochemical performance shows that the highly dispersed tin and tin-cobalt alloy composites may be promising anode materials for lithium ion batteries,

关 键 词：锂离子蓄电池 负极材料 锡钴合金 高能球磨 

分 类 号：TM912.9[电气工程—电力电子与电力传动]