The relation between structural features and electrochemical activity of MnO2 nanoparticles synthesized from a polyol-made Mn 3O4 precursor
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Springer Nature
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Resumo
A simple hybrid synthesis processing method was developed to synthesize γ-MnO2 nanocrystalline particles. The polyol method was modified by the addition of nitric acid in order to allow the synthesizing of single-phase Mn3O4 in a large scale. In the sequence, the acid digestion technique was used to transform Mn3O4 into γ-MnO2. Structural and morphological characterization was carried out by X-ray diffractometry, Infrared and Raman spectroscopy, thermogravimetric analysis, nitrogen adsorption isotherm, scanning electron microscopy, and transmission electron microscopy. The electrochemical properties were investigated by cyclic voltammetry and galvanostatic charge-discharge measurements. The synthesized material exhibits a specific capacitance of 125.1 F g-1 at a mass loading of 0.98 mg cm-2. The relation between structural features and electrochemical activity is discussed by comparing the synthesized material with commercial electrolytic manganese dioxide. © 2013 Springer-Verlag Berlin Heidelberg.
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De Wolff disorder , Microtwinning , Pseudocapacitance , Supercapacitors , Electrolytic manganese dioxides , Galvanostatic charge discharges , Infrared and Raman spectroscopy , Morphological characterization , Super capacitor , Alcohols , Cyclic voltammetry , Manganese , Manganese oxide , Scanning electron microscopy , Thermogravimetric analysis , Transmission electron microscopy , X ray diffraction analysis , Synthesis (chemical)
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Inglês
Citação
Journal of Solid State Electrochemistry, v. 17, n. 7, p. 1967-1976, 2013.
