Hollow carbon spheres with a controllable shell structure
Hollow carbon spheres with a controllable shell structure
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DOI：
10.1039/b609971h
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发表时间：
2006-11
影响因子：
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通讯作者：
F. Su;X. Zhao;Yong Wang;Likui Wang;J. Lee
中科院分区：
文献类型：
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作者：
F. Su;X. Zhao;Yong Wang;Likui Wang;J. Lee
以二氧化硅球为模板，苯为碳源，采用化学气相沉积法（CVD）制备了具有光滑单壳、变形单壳、双壳和氮掺杂壳的空心碳球。结果表明，HCS的形貌在很大程度上取决于实验条件，包括CVD时间和温度，以及二氧化硅球的直径。结果表明，相对较大的二氧化硅球有利于形成具有非常光滑的表面的HCS。短的CVD时间导致薄的碳壳，从而使HCS变形。高CVD温度增强了HCS的石墨性质。实验数据还表明，掺杂N后的HCS作为锂离子电池负极的循环性能得到了改善。这项工作还证明了使用HCS作为模板来制造单分散空心二氧化硅球。
In this work, hollow carbon spheres (HCSs) with smooth single shells, deformed single shells, double shells, and N-doped shells were prepared using silica spheres as templates and benzene as a carbon precursor via chemical vapor deposition (CVD). It was observed that the morphology of the HCSs largely depended on the experimental conditions, including CVD duration and temperature, and the diameter of silica spheres. Results showed that relatively large silica spheres favored the formation of HCSs with a very smooth surface. A short CVD time led to a thin carbon shell, thus deformed HCSs. High CVD temperatures enhanced the graphitic nature of the HCSs. Experimental data also demonstrated that the cyclability of the HCSs as an anode in lithium-ion batteries was improved after doping with N. The use of HCSs as templates for the fabrication of monodisperse hollow silica spheres was also demonstrated in this work.