期刊
NEW JOURNAL OF CHEMISTRY
卷 35, 期 2, 页码 469-475出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0nj00712a
关键词
-
资金
- National Natural Science Foundation of China [20663001, 51064004, 20763002]
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.
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