Facile synthesis of MnO2/CNT nanocomposite and its electrochemical performance for supercapacitors

被引：114

作者：

Wang, Hongjuan ^{[1
]}

Peng, Cheng ^{[1
]}

Peng, Feng ^{[1
]}

Yu, Hao ^{[1
]}

Yang, Jian ^{[1
]}

机构：

[1] S China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Guangdong, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2011年 / 176卷 / 14期

关键词：

Supercapacitor; Manganese dioxides; Specific capacitance; Charge-discharge; Carbon nanotubes; MANGANESE OXIDE; ELECTRODE MATERIALS; NANOTUBE COMPOSITE; CARBON NANOTUBES; ENERGY-STORAGE; HIGH-POWER; CAPACITORS; ARRAYS; POLYANILINE; DEPOSITION;

D O I：

10.1016/j.mseb.2011.05.043

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A nanocomposite of manganese dioxide coated on the carbon nanotubes (MnO2/CNTs) was synthesized by a facile direct redox reaction between potassium permanganate and carbon nanotubes without any other oxidant or reductant addition. The morphology, microstructure and crystalline form of this MnO2/CNT nanocomposite were characterized by scanning electron microscopy (SEM), transition electron microscopy (TEM). X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The electrochemical properties are characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and galvanostatic charge/discharge (GCD). The results show that the facile prepared MnO2/CNTs nanocomposite shows specific capacitance of 162.2 Fg(-1) at the current density of 0.2 A g(-1) and excellent charge/discharge property with 90% of its specific capacitance kept after 2000 cycles at the current density of 5 A g(-1) (C) 2011 Elsevier BM. All rights reserved.

引用

页码：1073 / 1078

页数：6

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