Titanium Oxynitride Nanoparticles Anchored on Carbon Nanotubes as Energy Storage Materials

Litao Yan, Gen Chen, Shuai Tan, Meng Zhou, Guifu Zou, Shuguang Deng, Sergei Smirnov, Hongmei Luo

Research output: Contribution to journalArticle

17 Scopus citations

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 languageEnglish (US)
Pages (from-to)24212-24217
Number of pages6
JournalACS Applied Materials and Interfaces
Volume7
Issue number43
DOIs
StatePublished - Nov 4 2015
Externally publishedYes

Keywords

  • carbon nanotubes
  • conformal coating
  • electrochemical performance
  • supercapacitor
  • titanium oxynitride

ASJC Scopus subject areas

  • Materials Science(all)

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