Journal
AIP ADVANCES
Volume 12, Issue 8, Pages -Publisher
AIP Publishing
DOI: 10.1063/5.0102197
Keywords
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Funding
- START Preliminary Proof-of-Concept Fund Program, University of Connecticut
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Composites of MnO2/MWCNTs were prepared using a one-pot hydrothermal method, and their physical characteristics and electrochemical performance were evaluated. The results showed that MnO2 was uniformly entangled with MWCNTs, and the composite materials exhibited high specific capacitance at a current density of 1 A/g.
Composites of MnO2/multi-wall carbon nanotubes (MWCNTs) were prepared using different weight ratios of MWCNTs: KMnO4 (1:2, 1:5, 1:10, 1:15, 1:20, and 1:25) using a one-pot hydrothermal method. The synthesized materials were physically characterized by x-ray diffraction, transmission electron microscopy (TEM), field emission-scanning electron microscopy (FE-SEM), (Brunauer-Emmett-Teller) BET, and thermogravimetric analysis. TEM and SEM studies indicate that MnO2 is homogeneously entangled with MWCNTs. The electrochemical performance evaluation was performed in a 3-electrode system using MnO2/MWCNT electrodes coated onto a Ni mesh as the working electrode, a Pt foil as the counter electrode, and Ag/AgCl as the reference electrode. The specific capacitance was obtained from charge-discharge studies at varying current densities between 0.5 and 5 A/g. The specific capacitance of MWCNT-KMnO4 (1:10, 1:15, and 1:25) samples was obtained as 114, 164, and 100 F/g, respectively, at a current density of 1 A/g. (C) 2022 Author(s)
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