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- Title
Facile and Scalable Synthesis of Ultrafine MnCo<sub>2</sub>O<sub>4</sub> Nanoparticles Via Mechanical Alloying as Supercapacitive Materials.
- Authors
Ghaffari Adli, Reza; Kianvash, Abbas; Hajalilou, Abdollah; Hosseini, Mir Ghasem; Abouzari-Lotf, Ebrahim
- Abstract
The possibility of synthesizing MnCo2O4 nanoparticles from MnCl2·4H2O and CoCl2·6H2O via mechanical alloying was investigated and sampled after 1, 2, 3, and 4 h of milling. X-ray diffraction (XRD) analysis showed that the initial materials were changed to MnCo2O4 after 1 h of milling and calcination. The broadening of the XRD lines showed that MnCo2O4 crystallites were on the order of nanometers. Fourier-transform infrared spectroscopy spectra of the MnCo2O4 samples indicated the cation distribution of Co-O (~ 567 cm−1) and Mn-O (~ 665 cm−1) in octahedral and tetrahedral sites, respectively. The morphology of the samples is spherical, according to field emission scanning electron microscopy results. Electrochemical measurements, including cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy, were performed to evaluate specific capacitance, cyclic stability, and charge transfer resistance, respectively. The highest capacitance of about 546 F/g and efficiency of 103% were obtained for the 3-h-milled MnCo2O4 sample.
- Subjects
MECHANICAL alloying; FIELD emission electron microscopy; INFRARED spectroscopy; IMPEDANCE spectroscopy; INFRARED spectra; FOURIER transform infrared spectroscopy
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2019, Vol 71, Issue 7, p2396
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-019-03486-9