碳基复合纳米纤维的制备与表征及其电容性

以DMF为溶剂，利用静电纺丝法制备了PAN/Co(OAc)2/CNTs复合纳米纤维，并通过高温碳化及活化的方法得到多孔碳基复合纳米纤维。利用扫描电子显微镜(SEM)、X射线衍射仪（XRD）、ASAP 2020及Solartron 1470分别研究了纤维的表面形貌、碳基复合纳米纤维的物相、比表面积和材料的电化学性能。研究结果表明：多孔碳材料为C/Co/CNTs复合纳米纤维；前驱体复合纳米纤维表面较为光滑，高温处理处部分纤维出现断裂；碳基复合纳米纤维的比表面积和孔体积分别为771m2/g和0.347cm3/g；在电流密度为1.0A/g时复合纳米纤维的比容量可达210F/g，电流为0.5mA时能量密度为3.1Wh/Kg，电流为5 mA时功率密度为2337W/Kg

Preparation,characterizationandcapacitive capability of carbon-based composite nanofibers

PAN/Co(OAc)2/CNTs composite nanofibers were fabricated via electrospinning with DMF as solvent, and by carbonization and activation of the above precursor nanofibers, porous carbon composite nanofibers were successfully obtained. SEM, XRD, ASAP 2020 and Solartron 1470 were used to characterize the surface morphology, the phase composition, specific surface area and electrochemical propertiy of the nanofibers. The result showed that some of the fibers were broken after sintering, and the surface area and pore volume of the porous C/Co/CNTs were 771 m2/g and 0.347 cm3/g, respectively. The specific capacitance of the composite nanofibers reached up to 210 F/g at the current density of 1.0 A/g. Also, its energy density and power density were 3.1 Wh/Kg and 2337 W/Kg at current of 0.5 mA and 5 mA, respectively.