Electrochemical capacitors of flower-like and nanowire structured MnO2 by a sonochemical method

被引：48

作者：

Nam, Ho-Seong ^{[1
,2
]}

Yoon, Jae-Kook ^{[3
]}

Ko, Jang Myoun ^{[3
]}

Kim, Jong-Duk ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Ctr Ultramicrochem Proc Syst, Dept Chem & Biomol Eng, Taejon 305701, South Korea

[2] Hanwha Chem R&D Ctr, Taejon 305804, South Korea

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

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2010年 / 123卷 / 01期

关键词：

Nanostructures; Precipitation; Ultrasonic techniques; Electrochemical properties; CHARGE STORAGE MECHANISM; NANOSTRUCTURED MNO2; ELECTRODE MATERIAL; AMORPHOUS MNO2; OXIDE; AREA; PERFORMANCE; BEHAVIOR;

D O I：

10.1016/j.matchemphys.2010.04.030

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanostructured manganese dioxide, MnO2, was synthesized by a sonochemical method. Nanostructured MnO2 had the shapes of flower-like and nanowires by changing the pH in the aqueous solution, as observed via scanning electron microscopy and transmission electron microscopy. The electrochemical capacitance was studied by cyclic voltammetry. A maximum specific capacitance of 300 Fg(-1) was obtained for the nanowires in a potential range from 0.1 to 0.9 V vs. SCE in 1 M sodium sulfate solution at a scan rate of 5 mV s(-1). These materials can be useful to increase the specific capacitance by wetting behavior of electrolytes from their structural properties. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：331 / 336

页数：6

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