MnO2-TiO2/C nanocomposite arrays for high-performance supercapacitor electrodes

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Biao Gao
  • Xingxing Li
  • Yiwei Ma
  • Yue Cao
  • Ziying Hu
  • Xuming Zhang
  • Jijiang Fu
  • Kaifu Huo

Detail(s)

Original languageEnglish
Pages (from-to)61-65
Journal / PublicationThin Solid Films
Volume584
Online published6 Oct 2014
Publication statusPublished - 1 Jun 2015

Abstract

Coaxial TiO2 and carbon nanotube arrays (TiO2/C NTAs) are prepared by hydrothermal treatment of anatase TiO2 nanotube arrays (TiO2 NTAs) in a glucose solution and carbonized under N2 at 700°C. The TiO2/C NTAs provide an extremely large, solvated, ion accessible surface area as well as a direct pathway for charge transport, thus yielding substantially improved areal capacitance of 26.1 mF/cm2 at a current density of 0.1 mA/cm2 that is 60 times larger than the capacitance of anatase TiO2 NTAs under the same conditions. The TiO2/C NTAs provide a good support for depositing highly pseudocapacitive materials such as MnO2 to form coaxial MnO2, C and TiO2 nanotube arrays (MnO2-TiO2/C NTAs), producing better capacitive properties. The MnO2-TiO2/C electrode shows a high specific capacitance (580 F/g at a current density of 2.6 A/g), an excellent rate capability and a good cycling stability.

Research Area(s)

  • Carbon, Composite, Manganese dioxide, Nanotube arrays, Supercapacitors, Titanium dioxide

Citation Format(s)

MnO2-TiO2/C nanocomposite arrays for high-performance supercapacitor electrodes. / Gao, Biao; Li, Xingxing; Ma, Yiwei; Cao, Yue; Hu, Ziying; Zhang, Xuming; Fu, Jijiang; Huo, Kaifu; Chu, Paul K.

In: Thin Solid Films, Vol. 584, 01.06.2015, p. 61-65.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review