磺化碳纳米管改性聚苯胺复合材料的合成与超级电容特性

运用重氮化技术制备了水溶性磺化碳纳米管,在此基础上,以不同直径的磺化碳纳米管(1～2 nm,<8 nm,10～20 nm,30～50 nm)为载体,采用原位氧化聚合方法合成了一系列磺化碳纳米管改性聚苯胺复合材料.红外和紫外-可见光谱分析表明,聚苯胺与磺化碳纳米管之间存在π-π相互作用,并形成了电荷转移复合物;且随着碳纳...

SYNTHESIS AND SUPERCAPACITANCE PERFORMANCE OF SULFONATED CARBON NANOTUBES MODIFIED POLYANILINE COMPOSITES

Water-soluble sulfonated carbon nanotubes were prepared by diazotization.On this basis,a series of sulfonated carbon nanotubes(1~2 nm,<8 nm,10~20 nm,30~50 nm) modified polyaniline composites were synthesized successfully using in situ oxidative polymerization method.FTIR spectra shows that the intensity ratio of I1580/I1490 increases with the decrease of the diameters of CNTs.Simultaneously,it can be found from the UV-Vis spectra that the absorption peak around 800 nm of the composites blue-shifts compared to the polyaniline nanorods.Aforementioned results indicate that the presence of the π-π interaction between the PANI and the sulfonated carbon nanotubes,and the charge transfer composites are formed,which increase as the diameter of CNTs decreases.Field emission scanning electron microscope(FESEM) images show the PANI/sSWCNT composite displays the morphological structure of the bundle of nanotubes coated with PANI while the PANI/sMWCNT composites exhibit the morphology of single nanotube coated with PANI.And with the increase of the diameters of carbon nanotubes,the diameters of the PANI/sMWCNT composites thicken gradually.The cyclic voltammetry results demonstrate that the composites have higher specific capacitance(309~457 F/g) compared to the PANI nanorods(271 F/g),and the specific capacitance of the composites increases with decreasing the diameter of CNTs.Moreover,the composites also have outstanding fast charge/discharge performance as electrode materials in the application of supercapacitors.