Issue 2, 2011
From the journal:

New Journal of Chemistry

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

Hong-Qiang Wang,a   Gui-fen Yang,a   Qing-Yu Li,*a   Xin-Xian Zhong,a   Fang-Ping Wang,a   Ze-Sheng Li*ab  and  Ya-hao Lic  

* Corresponding authors

a Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), School of Chemistry & Chemical Engineering of Guangxi Normal University, Guilin, Guangxi, P. R. China
E-mail: 13975808173@126.com, lzs212@163.com
Fax: +86 0773 5854077
Tel: +86 0773 3310900

b The State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University, Guangzhou, Guangdong, P. R. China

c School of Chemistry & Chemical Engineering of Chong Qing University, Chongqing, P. R. China

Abstract

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.

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

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Article information

DOI
https://doi.org/10.1039/C0NJ00712A
Article type
Paper
Submitted
17 Sep 2010
Accepted
28 Oct 2010
First published
07 Dec 2010

New J. Chem., 2011,35, 469-475

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

H. Wang, G. Yang, Q. Li, X. Zhong, F. Wang, Z. Li and Y. Li, New J. Chem., 2011, 35, 469 DOI: 10.1039/C0NJ00712A

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