柔性自支撑介孔碳纳米纤维的制备及其在超级电容器电极上的应用

摘要

为制备柔性介孔碳纳米纤维,将其用作自支撑超级电容器材料.本文以热固性酚醛树脂(PF)为碳源,嵌段共聚物Pluronic F127为模板剂,聚乙烯醇缩丁醛(PVB)为助纺剂,通过静电纺丝法和简单的热处理合成新型的一维介孔碳纤维.通过XRD、比表面积以及孔分布对介孔碳纳米材料进行表征.结果表明:加入Pluronic F127的碳纳米纤维内部存在大量的介孔结构.其中,MCNFs-2获得1444.26 m2/g的比表面积,从而提供了更多的活性位点以及比电容;并且在6 mol/L KOH水溶液中,MCNFs-2电极获得较高的放电比容量(139.6 F/g,0.05 A/g的电流密度)和优秀的倍率性能.%In order to prepare the flexible mesoporous carbon nanofibers, which is used as free-standing supercapacitor material, a novel type of one -dimensional mesoporous carbon nanofibers has been prepared via the electrospinning technique and thermal treatment by using resol as the carbon source and triblock copolymer Pluronic F127 as the template.The mesoporous carbon nanofibers are characterized by x-ray diffraction,specific surface area and pore distribution.The results show that there are a lot of mesoporous structures in the carbon nanofibers with addition of Pluronic F127. The obtained MCNFs-2 shows a mesoporous structure with ultra-high specific surface area of 1 444.26 m2/g, providing numerous electroactive sites to accommodate more charges.As a result,the MCNFs-2 electrode exhibites high specific capacitance(139.6 F/g at 0.05 A/g)and excellent rate of performance in a 6 mol/L KOH aqueous solution.