【摘要】 通过化学气相沉积方法原位制备了氧化硅/碳纳米管(SiO/CNTs)负极材料.扫描电镜(SEM)测试结果表明,碳纳米管沉积在氧化硅表面,形成笼状结构,将氧化硅粒子紧密包裹.SiO/CNTs负极材料的初始充放电容量分别为1171和789mAh/g,经过80次充放电循环后,可逆容量为500mAh/g.在循环过程中,碳纳米管和氧化硅之间的紧密接触使得SiO/CNTs复合材料保持了稳定的导电网络,循环性能得以提高.更多还原

【Abstract】 A new anode composition SiO/CNTs (carbon nanotubes) has been prepared by chemical vapor deposition (CVD) method. The results of scanning electron microscopy (SEM) confirm that CNTs deposit on small SiO particles, form a cage, and enwrap SiO particles tightly. SiO/CNTs anode composition exhibits an initial discharge and charge capacity of 1171 and 789 mAh/g, respectively, and maintains a reversible capacity of 500 mAh/g after 80 cycles. The improvement of the cyclic performance for SiO/CNTs composition is related to the maintaining of the electric network during cycling, which benefits from a tight contact between CNTs and SiO particles.更多还原