Citation: XU Juan, LIU Jia-Qin, LI Jing-Wei, WANG Yan, LÜ Jun, WU Yu-Cheng. Controlled Synthesis and Supercapacitive Performance of Heterostructured MnO₂/H-TiO₂ Nanotube Arrays[J]. Acta Physico-Chimica Sinica, ;2016, 32(10): 2545-2554. doi: 10.3866/PKU.WHXB201606161 shu

Controlled Synthesis and Supercapacitive Performance of Heterostructured MnO₂/H-TiO₂ Nanotube Arrays

XU Juan ^1,3, ,
LIU Jia-Qin ^2,3 ,
LI Jing-Wei ² ,
WANG Yan ^3,4 ,
LÜ Jun ^3,4 ,
WU Yu-Cheng ^3,4

1.
School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, P. R. China;
2.
Institute of Industry & Equipment Technology, Hefei University of Technology, Hefei 230009, P. R. China;
3.
Key Laboratory of Advanced Functional Materials and Devices, Hefei 230009, P. R. China;
4.
School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, P. R. China

Received Date: 12 April 2016
Revised Date: 14 June 2016

Fund Project: The project was supported by the National Natural Science Foundation of China (51402078), Natural Science Foundation of Anhui Province, China (1408085QE85), and Young Scholar Enhancement Foundation (Plan B) of HFUT, China (JZ2016HGTB0711).

This study used the target-controlled anodizing process for the controllable fabrication of TiO₂ nanotube arrays (TiO₂ NTAs) film substrate with large specific surface area and well-separated nanotubes. After annealing crystallization, TiO₂ NTAs were successively functional modified by electrochemical hydrogenation and sequential chemical bath deposition of high specific capacitance MnO₂ nanoparticles onto both the outer and inner surfaces of the nanotubes, thus constructing the heterostructured MnO₂/H-TiO₂ NTAs electrode. The as-prepared samples were fully characterized by field emission scanning electron microscopy (FESEM), highresolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy. The supercapacitive performance and stability of the resulting samples were systematically evaluated using electrochemical workstation. The results from the current study revealed that conductivity and electrochemical properties of H-TiO₂ NTAs were dramatically enhanced through electrochemical hydrogenation and the specific capacitance of H-TiO₂ NTAs could achieve 7.5 mF·cm^-2 at current density of 0.2 mA·cm^-2, which is almost 75 times the performance of TiO₂ NTAs (0.1 mF·cm^-2). Furthermore, the specific capacitance of MnO₂/H-TiO₂ NTAs-2 could achieve 481.26 F·g^-1 at a current density of 3 mA·mg^-1 as well as outstanding long-term cycling stability with only 11% reduction of initial specific capacitance at a current density of 5 mA·mg^-1 after 1000 cycles.
- TiO₂ nanotube array,
- Hydrogenation,
- MnO₂,
- Electrochemistry,
- Supercapacitive performance
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沈阳化工大学材料科学与工程学院沈阳 110142

Controlled Synthesis and Supercapacitive Performance of Heterostructured MnO2/H-TiO2 Nanotube Arrays

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通讯作者: 陈斌, bchen63@163.com

Controlled Synthesis and Supercapacitive Performance of Heterostructured MnO₂/H-TiO₂ Nanotube Arrays