Effects of the Mixing and Aging Process on the Morphologies and Electrochemical Properties of Co/Fe Co-doped MnO2

Fe/Co co-doped γ -MnO 2 was synthesized by a facile chemical method without using any surfactant at room temperature in this study. The effects of the mixing and aging process on the electrochemical properties of Fe/Co co-doped MnO 2 materials were investigated by cyclic voltammograms (CV), galvanos...

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Bibliographic Details
Published in:JOM (1989) 2018-08, Vol.70 (8), p.1377-1382
Main Authors: Liu, Zhi-Wei, Zhang, Ning, Liu, You-Zhi
Format: Article
Language:English
Subjects:
Advanced Materials for Energy Storage and Conversion Applications
Chemistry/Food Science
Earth Sciences
Engineering
Environment
Physics
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Summary:Fe/Co co-doped γ -MnO 2 was synthesized by a facile chemical method without using any surfactant at room temperature in this study. The effects of the mixing and aging process on the electrochemical properties of Fe/Co co-doped MnO 2 materials were investigated by cyclic voltammograms (CV), galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS). The Fe/Co co-doped MnO 2 material had a specific capacitance (SC) of 214 F g −1 at a scan rate of 2 mV s −1 and good cycling stability, which was better than that produced via the drop-adding method in a stirred mixer and further confirmed the intensifying effect of the T-mixer on the mixing process. Therefore, the electrochemical properties of the co-doped MnO 2 could be significantly improved by the T-mixer and the stirring aging method.
ISSN:1047-4838
1543-1851
DOI:10.1007/s11837-017-2673-3