Hierarchically structured TiO2@MnO2 nanowall arrays as potential electrode material for high-performance supercapacitors

被引：59
作者：
Ramadoss, Ananthakumar [1 ]
Kim, Sang Jae [1 ,2 ,3 ]
机构：
[1] Jeju Natl Univ, Sci & Engn Coll, Fac Appl Energy Syst, Nanomat & Syst Lab, Cheju 690756, South Korea
[2] Jeju Natl Univ, Engn Coll, Dept Mechatron Engn, Nanomat & Syst Lab, Cheju 690756, South Korea
[3] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2014年 / 39卷 / 23期
基金：
新加坡国家研究基金会;
关键词：
Core-shell; Energy storage; Manganese dioxide; Supercapacitor; Titanium dioxide; Nanorods; CORE-SHELL NANOWIRES; TIO2 NANOTUBE ARRAYS; NANOSHEET CORE/SHELL ARRAYS; HETEROSTRUCTURE; MECHANISM; NANORODS; FOAM;
D O I：
10.1016/j.ijhydene.2014.05.118
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：
We have reported a facile route for the fabrication of TiO2@MnO2 core-shell nano-structures for use as an electrode material, using a simple hydrothermal process for supercapacitor applications. Field-emission scanning electron microscopy and transmission electron microscopy studies confirmed the formation of a MnO2 nanowall shell structure on the core of TiO2 nanorod surfaces. The nanostructured TiO2@MnO2 core-shell was used as an electrode material, which exhibited excellent electrochemical properties with an improved areal capacitance of 22.19 mF cm(-2) (TM-3) at a scan rate of 5 mV s(-1) in a 1-M Na2SO4 electrolyte solution. Moreover, the electrode material demonstrated excellent performance with long term cycling stability, by retaining 85% of its initial capacitance after 4000 cycles. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：12201 / 12212
页数：12
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