材料科学
碳纳米管
阳极
锂(药物)
透射电子显微镜
纳米技术
纳米结构
拉曼光谱
扫描电子显微镜
超级电容器
离子
碳纤维
化学工程
复合材料
电化学
复合数
电极
化学
光学
物理化学
内分泌学
有机化学
工程类
物理
医学
作者
Jisheng Zhou,Huaihe Song,B. G. Fu,Bin Wu,Xiaohong Chen
摘要
Novel carbon nanotubes (CNTs) were prepared on a large-scale. Their morphology and structure were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and Raman measurements. It was found that the prepared CNTs possess a quadrangular cross section, as well as one open end and "herringbone"-like walls, so these novel CNTs were named q-CNTs. The unique morphology of q-CNTs implies broad potential applications in many fields, including drug delivery, conductive and high-strength composites, field emission displays and radiation sources, hydrogen storage media, and supercapacitors. When used as the anode materials for lithium-ion batteries, q-CNTs exhibit excellent high-rate performance (a high-reversible capacity of 181 mAh g−1 at the current density of 1000 mA g−1 (ca. 3 C)), which is much higher than that of the common multi-wall carbon nanotubes. This high-rate performance should be attributed to the unique nanostructure of q-CNTs, which results in a high diffusion coefficient for lithium ions in the q-CNTs.
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