Titanium Oxynitride Nanoparticles Anchored on Carbon Nanotubes as Energy Storage Materials

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• 作者：Litao Yan ; Gen Chen ; Shuai Tan ; Meng Zhou ; Guifu Zou ; Shuguang Deng ; Sergei Smirnov ; Hongmei Luo
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：November 4, 2015
• 年：2015
• 卷：7
• 期：43
• 页码：24212-24217
• 全文大小：407K
• ISSN：1944-8252

文摘

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 掳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^鈥? at a current density of 0.5 A g^鈥?, which is much higher than that of CNTs (33.4 F g^鈥?) and CNTs/TiO₂ (83.4 F g^鈥?) obtained by annealing CNTs/a-TiO₂ at 450 掳C in nitrogen gas. CNTs/TiON also exhibits enhanced cycle durability, which enables it to be considered as a promising candidate for supercapacitors.