以纳米镍粉为催化剂,热分解法制备了碳纳米管.应用X射线衍射对碳纳米管的结构进行了研究,透射电子显微镜观察了碳纳米管的形貌.碳纳米管的直径在15nm左右,长>100nm,d002为0.338nm.在结构上,纳米碳管具有与石墨类似的良好规整性,具有较高的可石墨化度,又具有纳米级的孔径,因此具有良好的贮锂性能.对碳纳米管的充放电性能研究结果表明,碳纳米管初始放电比容量为654mAh/g,高于纯石墨的理论容量372mAh/g,循环性能较好.
Carbon nanotubes were produced by catalytic thermal decomposition using metal Ni nanopartical as catalyst.
X-ray diffraction and transmission electron microscope were used to determine the size and morphology of carbon nanotubes. The results show that carbon
nanotubes are 20--30nm in diameter and longer than 100nm with a high order degree of graphitization. There are a large amount of nanochannels lead to
higher specific capacity. The carbon nanotubes exhibit a high electrochemical storage lithium capacity, being 654mAh/g at first cycle
and having a good cycling stability.
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