Behavior of NiO-MnO2/MWCNT composites for use in a supercapacitor

被引：54

作者：

Hwang, Seung-Gi ^{[1
]}

Ryu, Seong-Hyeon ^{[1
]}

Yun, Su-Ryeon ^{[1
]}

Ko, Jang Myoun ^{[2
]}

Kim, Kwang Man ^{[3
]}

Ryu, Kwang-Sun ^{[1
]}

机构：

[1] Univ Ulsan, Dept Chem, Ulsan 680749, South Korea

[2] Hanbat Natl Univ, Dept Appl Chem & Biotechnol, Taejon 305719, South Korea

[3] ETRI, Res Team Nanoconvergence Sensor, Taejon 305700, South Korea

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2011年 / 130卷 / 1-2期

关键词：

Electrochemical properties; Composite materials; Coatings; CARBON NANOTUBES; RUO2; FUNCTIONALIZATION; NANOCOMPOSITE; PERFORMANCE; ELECTRODES; DESIGN;

D O I：

10.1016/j.matchemphys.2011.07.022

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

NiO-MnO2/MWCNT composite was formed by a simple chemical precipitation method using a chelating agent and Ni and Mn hydroxides on MWCNT. The NiO-MnO2/MWCNT was pretreated by ultrasonication, followed by thermal annealing at 300 degrees C. The material obtained was applied as an electrode in a supercapacitor. FT-IR, EDS, XRD, FE-SEM and FE-TEM were used to characterize the structural features. The results show that a nanosized NiO-MnO2 layer covered the surface of the MWCNT, and the original structure of the MWCNT was retained during the coating process. The capacitive behavior of the NiO-MnO2/MWCNT electrode was investigated by cyclic voltammetry and galvanostatic charge/discharge methods in a 6 M KOH aqueous solution. The cyclic voltammetry curves demonstrated that the maximum specific capacitance of the NiO-MnO2/MWCNT electrode was 193.50 Fg(-1), which is significantly higher than that of an MWCNT electrode. The results show that both the MWCNT and NiO-MnO2/MWCNT electrodes exhibited capacitive behaviors, and the NiO-MnO2 layer increased the capacitance of the supercapacitor. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：507 / 512

页数：6

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