碳纳米管的功能化及其电化学性能

超级电容器作为一种新型的储能元件,以其快速储存、释放能量等优点,近年来成为各国科研工作的研究重点和焦点1￣3],并在数据记忆存储系统、便携式仪器设备、后备电源、通讯设备、计算机、燃料电池、电动车混合电源等许多领域都有广泛的应用前景4]。目前,超级电容器用的电极材

Functionalization and Electrochemical Performance of Carbon Nanotubes

Carbon nanotubes with arylsulfonic acid groups were prepared using azobisisobutyronitrile as an initiator via the surface modification of carbon nanotubes by aminobenzenesulfonic acid in fuming sulfuric acid. The electrochemical performances of the functional multi-wall carbon nanotubes used as active electrode materials were tested with cyclic voltammetry and galvanostatic charge-discharge. The results show that the functional multi-wall carbon nanotubes electrodes exhibit larger capacitance. The specific capacitance has been enchanced up to 50 F·g^-1 at 3 mA discharging compared to that of carbon nanotubes coped with fuming sulfuric acid (22 F·g^-1 at 3 mA) and carbon nanotubes without treatment (15 F·g^-1 at 3 mA).