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用CVD法合成晶须状碳纳米管(WCNTs),对其进行石墨化纯化处理。利用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射(XRD)、拉曼光谱和热重分析(TGA)对其进行表征。以纤维素为基体材料,WCNTs为功能材料,将分散好的WCNTs与纸纤维混合,抽滤制成WCNTs复合纸,WCNTs复合纸的电导率由石墨化前14.1 S/m提升到石墨化后325.1 S/m。采用两电极体系,以1 mol/L Li PF6为电解液,通过循环伏安及恒流充放电方法来研究WCNTs复合纸为极片的超级电容器性能,在扫描速率为1 m V/s时,石墨化WCNTs复合纸电极的比容量达到90 F/g。在电流密度为800 m A/g时,比能量和比功率分别为21.3 Wh/kg和2.1 k W/kg,表现出良好的超级电容器性能。
Whisk-like carbon nanotubes (WCNTs) were synthesized by CVD and graphitized and purified. It was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy and thermal gravimetric analysis (TGA). Using WCNTs as the matrix material and WCNTs as the functional material, the WCNTs were mixed with the paper fibers and then filtered to obtain WCNTs composite paper. The electrical conductivity of the WCNTs composite paper increased from 14.1 S / m before graphitization to 325.1 S / m. A two-electrode system was used to study the supercapacitor performance of WCNTs as a sheet by cyclic voltammetry and constant current charge-discharge method using 1 mol / L Li PF6 as the electrolyte. When the scanning rate was 1 mV / s, Graphite WCNTs composite paper electrode specific capacity of 90 F / g. The specific energy and specific power of 21.3 Wh / kg and 2.1 k W / kg, respectively, at a current density of 800 m A / g showed good supercapacitor performance.