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

Biao Gao; Xingxing Li; Yiwei Ma; Yue Cao; Ziying Hu; Xuming Zhang; Jijiang Fu; Kaifu Huo; Paul K. Chu

doi:10.1016/j.tsf.2014.09.071

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

Biao Gao
, Xingxing Li
, Yiwei Ma
, Yue Cao
, Ziying Hu
, Xuming Zhang
, Jijiang Fu
, Kaifu Huo^*
, Paul K. Chu^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

41 Citations (Scopus)

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.

Original language	English
Pages (from-to)	61-65
Journal	Thin Solid Films
Volume	584
Online published	6 Oct 2014
DOIs	https://doi.org/10.1016/j.tsf.2014.09.071
Publication status	Published - 1 Jun 2015

Research Keywords

Carbon
Composite
Manganese dioxide
Nanotube arrays
Supercapacitors
Titanium dioxide

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@article{a531199da8b54ba79e07004d73627826,

title = "MnO2-TiO2/C nanocomposite arrays for high-performance supercapacitor electrodes",

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.",

keywords = "Carbon, Composite, Manganese dioxide, Nanotube arrays, Supercapacitors, Titanium dioxide",

author = "Biao Gao and Xingxing Li and Yiwei Ma and Yue Cao and Ziying Hu and Xuming Zhang and Jijiang Fu and Kaifu Huo and Chu, \{Paul K.\}",

year = "2015",

month = jun,

day = "1",

doi = "10.1016/j.tsf.2014.09.071",

language = "English",

volume = "584",

pages = "61--65",

journal = "Thin Solid Films",

issn = "0040-6090",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - MnO2-TiO2/C nanocomposite arrays for high-performance supercapacitor electrodes

AU - Gao, Biao

AU - Li, Xingxing

AU - Ma, Yiwei

AU - Cao, Yue

AU - Hu, Ziying

AU - Zhang, Xuming

AU - Fu, Jijiang

AU - Huo, Kaifu

AU - Chu, Paul K.

PY - 2015/6/1

Y1 - 2015/6/1

N2 - 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.

AB - 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.

KW - Carbon

KW - Composite

KW - Manganese dioxide

KW - Nanotube arrays

KW - Supercapacitors

KW - Titanium dioxide

UR - https://www.scopus.com/pages/publications/84928496337

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84928496337&origin=recordpage

U2 - 10.1016/j.tsf.2014.09.071

DO - 10.1016/j.tsf.2014.09.071

M3 - RGC 21 - Publication in refereed journal

SN - 0040-6090

VL - 584

SP - 61

EP - 65

JO - Thin Solid Films

JF - Thin Solid Films

ER -