Porous nano-MnO2: large scale synthesis via a facile quick-redox procedure and application in a supercapacitor

被引：115

作者：

Wang, Hong-Qiang ^{[1
]}

Yang, Gui-fen ^{[1
]}

Li, Qing-Yu ^{[1
]}

Zhong, Xin-Xian ^{[1
]}

Wang, Fang-Ping ^{[1
]}

Li, Ze-Sheng ^{[1
,2
]}

Li, Ya-hao ^{[3
]}

机构：

[1] Guangxi Normal Univ, Key Lab Chem & Mol Engn Med Resources, Minist Educ China, Sch Chem & Chem Engn, Guilin 541004, Guangxi, Peoples R China

[2] Sun Yat Sen Univ, State Key Lab Optoelect Mat & Technol, Sch Phys & Engn, Guangzhou 510275, Guangdong, Peoples R China

[3] Chong Qing Univ, Sch Chem & Chem Engn, Chongqing 400030, Peoples R China

来源：

NEW JOURNAL OF CHEMISTRY | 2011年 / 35卷 / 02期

基金：

中国国家自然科学基金;

关键词：

MANGANESE-DIOXIDE; ELECTROCHEMICAL CAPACITORS; SONOCHEMICAL SYNTHESIS; SILVER NANOPARTICLES; MICROEMULSION METHOD; NANOSTRUCTURED MNO2; COMPOSITE ELECTRODE; FORMATION MECHANISM; OXIDE; DEPOSITION;

D O I：

10.1039/c0nj00712a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A new type of porous nano-MnO2 for supercapacitors has been synthesized for the first time by a facile sonochemistry route from a quick-redox reaction between KMnO4 and D-glucose. The crystal structure, morphology and chemical composition of the MnO2 product were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy-dispersive X-ray spectroscopy (EDS). The results show that the porous MnO2 nanoparticles in the range 20-50 nm are interestingly composed of nanorods with diameters of about 2 nm and lengths of 4-8 nm. A possible growth mechanism of this nanostructure has been identified based on the experimental results. The electrochemical properties of the porous MnO2 were investigated in a symmetric capacitor cell using both 1 M Na2SO4 and 9 M KOH aqueous solutions. The results indicate that the MnO2 electrodes have a good capacitive performance in both cases.

引用

页码：469 / 475

页数：7

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