氢键诱导的聚吡咯/苯磺酸功能化多壁碳纳米管的制备及其电化学行为

采用原位芳基重氮化反应对碳纳米管进行苯磺酸功能化, 进而制备了聚吡咯/苯磺酸化碳纳米管复合材料(PPy/f-MWCNTs), 通过透射电镜(TEM)及扫描电镜(SEM)测试发现, 氢键诱导使聚吡咯成功地包覆在碳纳米管表面. 循环伏安和恒流充放电测试结果表明, 复合材料具有良好的电化学电容性能, 当聚吡咯与苯磺酸化碳纳米管质量比为1:1时, 复合材料在1.0 A·g-1的电流密度下的比容量达266 F·g-1, 而且聚吡咯利用率比未功能化聚吡咯/碳纳米管(PPy/p-MWCNTs)和纯聚吡咯(PPy)提高了1倍以上.

Preparation of Polypyrrole/Benzenesulfonic Functionalized Multi-Walled Carbon Nanotubes Induced by Hydrogen Bonding and Their Electrochemical Behavior

Multi-walled carbon nanotubes were functionalized using in situ generated aryl diazonium and were then used to synthesize polypyrrole/benzenesulfonic functionalized multi-walled carbon nanotube composites (PPy/f-MWCNTs). Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) results indicated that a uniform PPy was successfully coated onto the sidewall of the f-MWCNTs, which was induced by hydrogen bonding. Cyclic voltammetry and galvanostatic charge/discharge measurements results showed that the composite possessed good electrochemical capacitive performance. The composite with m(PPy):m(MWCNTs) of 1:1 had a capacity of 266 F·g~(-1) at a current density of 1.0 A·g~(-1), and the utilization of PPy was more than one time higher than polypyrrole/ un-functionalized multi-walled carbon nanotube composites (PPy/p-MWCNTs) and pure PPy.