Abstract
Sub-8 nm titanium oxynitride (TiON) nanoparticles were uniformly formed on the surface of carbon nanotubes (CNTs) by annealing amorphous TiO2 (a-TiO2) conformally coated CNTs (CNTs/a-TiO2) at 600 °C in ammonia gas. The novel CNTs/TiON nanocomposite was systematically characterized by X-ray diffraction (XRD), high-resolution transmission electron microscopy imaging (HRTEM), scanning transmission electron microscopy-energy dispersive spectroscopy (STEM-EDX), and X-ray photoelectron spectroscopy (XPS). The results show that Ti, O, and N are homogeneously distributed in TiON nanoparticles. The specific capacitance of CNTs/TiON exhibits 187 F g-1 at a current density of 0.5 A g-1, which is much higher than that of CNTs (33.4 F g-1) and CNTs/TiO2 (83.4 F g-1) obtained by annealing CNTs/a-TiO2 at 450 °C in nitrogen gas. CNTs/TiON also exhibits enhanced cycle durability, which enables it to be considered as a promising candidate for supercapacitors.
Original language | English (US) |
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Pages (from-to) | 24212-24217 |
Number of pages | 6 |
Journal | ACS Applied Materials and Interfaces |
Volume | 7 |
Issue number | 43 |
DOIs | |
State | Published - Nov 4 2015 |
Externally published | Yes |
Keywords
- carbon nanotubes
- conformal coating
- electrochemical performance
- supercapacitor
- titanium oxynitride
ASJC Scopus subject areas
- General Materials Science