Enhanced supercapacitive performance on TiO2@C coaxial nano-rod array through a bio-inspired approach

被引：65

作者：

Tang, Haolin ^{[1
]}

Xiong, Ming ^{[1
]}

Qu, Deyu ^{[2
]}

Liu, Dan ^{[2
]}

Zhang, Zijuan ^{[3
]}

Xie, Zhizhong ^{[2
]}

Wei, Xi ^{[1
]}

Tu, Wenmao ^{[1
]}

Qu, Deyang ^{[3
]}

机构：

[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China

[2] Wuhan Univ Technol, Dept Chem, Wuhan 430070, Peoples R China

[3] Univ Wisconsin, Coll Engn & Appl Sci, Dept Mech Engn, Milwaukee, WI 53211 USA

来源：

NANO ENERGY | 2015年 / 15卷

关键词：

TiO2 nanotube array; Dopamine self polymerization; Pseudocapacitive; TiO2@C nanorod array; ASYMMETRIC SUPERCAPACITOR; CARBON SPHERES; TIO2; NANOTUBES; POROUS CARBON; ELECTRODES; GRAPHENE; ENERGY; MNO2; CAPACITANCE; SURFACE;

D O I：

10.1016/j.nanoen.2015.04.014

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A coaxial core-shell structured TiO2@carbon nano-rod arrays (TiO2@C NRAs) was constructed and tested as a supercapacitor electrode in this study. Dopamine was self-assembled into a polydopamine nano-rod arrays within the TiO2 nano-tube arrays (TiO2 NTAs) and was used as a precursor for the carbon nano-rod generation. Electrochemical measurements showed that the electrodes made with coaxial TiO2@C NRAs exhibited substantially higher electrochemical performances such as larger areal capacitance and faster charge/discharge capability than those of the pristine TiO2 NTA electrode and porous active carbon materials. Benefiting from the enhanced electrical conductivity and increased surface area of the coaxial nano-rod structure, the prepared coaxial TiO2@e NRAs electrode achieved a remarkable areal capacitance of 40.75 mF cm(-2) at a current density of 0.2 mA cm(-2), which was significantly higher than that of the pristine TiO2 NTAs (0.31 mF cm(-2)). (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：75 / 82

页数：8

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