Title :
Study of Activated Bamboo-Shaped Multiwall Carbon Nanotubes as Supercapacitor Electrodes
Author :
Zhang, Chao ; Xiao Bin Zhang ; Xin Yong Tao ; Sheng Ming Zhou ; Ma, Lei ; Zhang, Huai
Author_Institution :
State Key Lab. of Silicon Mater., Zhejiang Univ., Hangzhou
Abstract :
Bamboo-shaped multiwall carbon nanotubes (BS-MWCNTs) activated by KOH with different KOH/CNT mass ratio are applied as electrodes for supercapacitors. The electrochemical capacitance of activated bamboo-shaped multiwall carbon nanotubes (ABS-MWCNTs) with KOH/CNT mass ratio 3:1 and 7:1 is 1.5 and 3 times that of the normal BS-MWCNTs, respectively. The activated materials still possess nanotubular morphology with many defects on the outer walls and open tips that give a significant increase of micropore volume, while keeping a noticeable mesoporosity. Both BS- MWCNTs and ABS-MWCNTs are characterized by transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM). Capacitance of the electrodes has been estimated by constant-current charge and discharge cycles experiments.
Keywords :
carbon nanotubes; electrochemical electrodes; nanotube devices; transmission electron microscopy; HRTEM; activated bamboo-shaped multiwall carbon nanotubes; constant-current charge; electrochemical capacitance; high-resolution transmission electron microscopy; micropore volume; nanotubular morphology; supercapacitor electrodes; Batteries; Capacitance; Carbon nanotubes; Chemicals; Electrodes; Mesoporous materials; Supercapacitors; Surface treatment; Systems engineering and theory; Transmission electron microscopy; activation; carbon nanotubes; supercapacitor;
Conference_Titel :
Nano/Micro Engineered and Molecular Systems, 2006. NEMS '06. 1st IEEE International Conference on
Conference_Location :
Zhuhai
Print_ISBN :
1-4244-0139-9
Electronic_ISBN :
1-4244-0140-2
DOI :
10.1109/NEMS.2006.334854
