Abstract
The manganese dioxide/polypyrrole (MnO2/PPy) nanocomposites were synthesized by miniemulsion polymerization (W/O), which prepared by impinging stream-rotating packed bed (IS-RPB), a novel emulsifying equipment. The obtained MnO2/PPy nanocomposites were characterized by HRTEM, DLS, and BET. The effects of high gravity factor, impact velocity, p-toluenesulfonic acid, potassium permanganate, and reaction time on the specific capacitance of MnO2/PPy nanocomposites were studied. Moreover, we investigated herein its electrochemical performances under suitable operating conditions by cyclic voltammetry, galvanostatic charge–discharge, electrochemical impedance spectroscopy, and cycling life. The results revealed that the obtained MnO2/PPy nanocomposites were flower-like spherical with a high specific surface area of 177.1 m2/g. Besides, the specific capacitance of MnO2/PPy nanocomposites was 231.9 F/g at 0.5 A/g. The electrochemical performances of MnO2/PPy nanocomposites were superior to that prepared MnO2. It is certain that IS-RPB could be used as an effective emulsifying device due to the process intensification and has great potential in industrial applications.
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