Supercapacitor from Nitrogen-Doped Carbon Nanotubes

Abstract:

CNTs were treated with hydrazine hydrate and diethylenetriamine, respectively. Scanning electron spectroscopy (SEM) observation showed that the doped CNTs kept the length/diameter ratio of pristine CNTs. X-ray photoelectron spectroscopy (XPS) characterized that nitrogen can be doped to CNTs. XPS analysis further indicated that C/N atomic ratio of CNTs treated by hydrazine hydrate is 95/2, four times of CNTs treated by diethylenetriamine, which is 96/0.5. The hydrophilicity for N-doped CNTs (N-CNTs) is much improved and enhanced by increasing N proportion. As electrode material of supercapacitor, nitrogen functional groups contribute pseudo-Faradic capacitance, but its cyclic performance still need to be improved. Thanks to the good hydrophilicity for N-CNTs that improves the wettability of CNTs for electrolyte; the specific capacitance of N-CNTs is still slightly higher than pristine CNTs after cycling.

• Periodical: Advanced Materials Research (Volumes 160-162)
• Pages: 1791-1796
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.160-162.1791
• Online since: November 2010
• Authors: Li Xiang Li, Yong Chang Liu, Xin Gen, Bai Gang An
• Keywords: Carbon Nanotube (CN), Diethylenetriamine, Hydrazine Hydrate, N-Doping, Super-Capacitor (SC)

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