不同形貌碳纳米管的制备及其嵌锂性能研究

以乙炔作为反应气 ,用化学气相沉积法 (CVD)和模板法在不同温度 (60 0℃、70 0℃ )下制备了不同形貌的碳纳米管 ,并采用TEM ,HRTEM ,SEM ,XRD ,Raman和充放电实验方法研究其形貌、结构和电化学嵌锂性能 .结果表明 ,不同的制备方法及反应温度对碳纳米管的形貌、结构特征和电化学嵌锂性能均有明显的影响 .在制备的样品中 ,制备温度越低 ,样品的石墨化程度越差 ,可逆嵌锂容量相应越高

Preparation and Electrochemical Lithium Intercalation Performance of Different Shaped Carbon Nanotube

In the present work, different shaped carbon nanotubes were produced by the general CVD and the template method at different temperature (600 ℃,700 ℃) with the reaction gas of acetylene. The morphology, structure and the electrochemical lithium intercalation performance were comparatively studied and characterized by TEM, HRTEM, SEM, XRD, Raman techniques and Charge/Discharge Test. It was found that the different preparation methods and temperatures all had an obvious effect on these properties of carbon nanotubes. In our samples, with the increase of preparation temperature, the degree of crystallinity decreased, and the reversible specific capacity increased respectively.