碳纳米管微结构的改变对其容量性能的影响

以KOH为活性剂，通过在高温下将碳纳米管进行活化处理来实现对碳纳米管管壁结构的改变，得到了比表面积和孔容分别是活化处理前约3倍和1.5倍的活性碳纳米管.将活化处理前后两种碳纳米管分别制作成电化学超级电容器电极，在充满氩气的无水手套箱组装成模拟电化学超级电容器，在恒流充放电模式下进行电化学可逆容量的测试，发现活性碳纳米管的电化学容量远高于活化前碳纳米管，是它的2倍.从而发现碳纳米管被打断，管壁变粗糙的活性碳纳米管比一般碳纳米管更适合用于电化学超级电容器电极材料.

Effect of Microstructure′s Change on Electrochemical Capacitance of Carbon Nanotubes

Activated carbon nanotubes were obtained by the activation of carbon nanotubes using KOH as activator at high temperature. The specific surface area and pore volume of the obtained activated carbon nanotubes were 3 and 1.5 times as large as that of the pristine carbon nanotubes, respectively. The two kinds of carbon nanotubes were used as the electrode materials of electrochemical supercapacitors and the simulated electrochemical supercapacitors were assembled in the glove box filled with argon air. The electrochemi calcapacitance of the activated carbon nanotubes was twice as large as that of the pristine carbon nanotubes by test under constant current charging discharging. So, the activated carbon nanotubes with a short cut length and rough tube surface are more suitable in using as the electrode materials of electrochemical supercapacitors than the normal carbon nanotubes.