摘要
用模板法合成纳米碳管阵列(ordered carbon nanotubes arrays,OCNT)。利用XRD、氮气吸附、电镜、 循环伏安技术对样品的结构和电化学性能进行表征。样品孔结构具有典型的二维六角(p6mm)有序分布,比 表面积高达1 703m2/g,中孔分布集中,最可儿直径3．5nm。OCNT由纳米碳管规整有序排列构成。OCNT具 有很好的电容特性,在高的电压扫描速度下比电容值不发生明显衰减,50mV/s的高电压扫描速度下,比电 容为181．2F/g;高频下仍能保持优异的电容特性,频率1Hz时样品的比电容大约100F/g。OCNT大的孔尺 寸和规整有序的孔结构是其优异电容性能的主要原因。
Ordered carbon nanotubes arrays （OCNT） were synthesized by templating method. The structure, morphology and electrochemical characteristics of OCNT were studied, using XRD, N2 adsorption, SEM,TEM,and cylic voltammogram. The results indicate that OCNT possess typical ordered mesoporous two-dimensional hexagonal structure（P6mm）, 1703m^2/g specific surface area and narrow meso--pore size distribution,which the diameter is 3.5nm. OCNT was composed of uniformly assembled carbon nanotubes. OCNT show excellent capacitance characteristics. The specific capacitance of OCNT declined only slightly even at high voltage scanning speed and it is 181.2 F/g at 50mV/s. Even under high frequency OCNT maintain high specific capacitance and＇it is about 100F/g under 1Hz. Large pore size and orderefd pore structure may account for the excellent capacitance characteristics.
出处
《炭素》
2005年第4期39-43,共5页
Carbon
关键词
纳米碳管阵列(OCNT)
电化学电容器
模板法
ordered carbon nanotubes arrays （OCNT）
electrochemical capacitors
templating method
