Sonochemically synthesized MnO2 nanoparticles as electrode material for supercapacitors |
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| Institution: | 1. Nanomaterials and Solar Energy Conversion Lab, Department of Chemistry, National Institute of Technology, Trichy 620 015, India;2. Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah 21413, P.O. Box 80203, Saudi Arabia;3. Department of Environmental Engineering and Science, Feng Chia University, Taichung 407, Taiwan |
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| Abstract: | In this study, manganese oxide (MnO2) nanoparticles were synthesized by sonochemical reduction of KMnO4 using polyethylene glycol (PEG) as a reducing agent as well as structure directing agent under room temperature in short duration of time and characterized by powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Scanning electron microscope (SEM), Transmission electron microscopy (TEM) and Brunauer–Emmett–Teller (BET) analysis. A supercapacitor device constructed using the ultrasonically-synthesized MnO2 nanoparticles showed maximum specific capacitance (SC) of 282 Fg?1 in the presence of 1 M Ca(NO3)2 as an electrolyte at a current density of 0.5 mA cm?2 in the potential range from 0.0 to 1.0 V and about 78% of specific capacitance was retained even after 1000 cycles indicating its high electrochemical stability. |
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| Keywords: | Sonochemical synthesis Amorphous materials X-ray diffraction Electrochemical properties Energy storage Supercapacitor |
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