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Surfactant-assisted electrodeposition and improved electrochemical capacitance of silver-doped manganese oxide pseudocapacitor electrodes |
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| Authors: | Montree Sawangphruk Supree Pinitsoontorn Jumras Limtrakul |
| Affiliation: | 1. Department of Chemical Engineering, Kasetsart University, Bangkok, 10900, Thailand 4. Center for Advanced Studies in Nanotechnology and Its Applications in Chemical, Food and Agricultural Industries, Kasetsart University, Bangkok, 10900, Thailand 5. NANOTEC Center of Excellence, National Nanotechnology Center, Kasetsart University, Bangkok, 10900, Thailand 2. Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand 3. Department of Chemistry and Center of Nanotechnology, Kasetsart University, Bangkok, 10900, Thailand |
| Abstract: | Ag-doped MnO2 pseudocapacitor electrodes with dendrite and foam-like structures were successfully produced for the first time using an electrodeposition method employing structure-directing agents, i.e., sodium dodecyl sulfate (SDS) and cetyltrimethylammonium bromide (CTAB) acting through micelle formation at solid–liquid interfaces. Doping silver with MnO2 enhanced their electronic conductance. Controlling pseudocapacitor electrode morphologies with surfactants accelerated ion transport. The specific capacitance values of the Ag-doped MnO2 films produced with SDS and CTAB, measured in 0.5?M Na2SO4 at a scan rate of 5?mV?s?1 were 551 and 557?F?g?1, respectively. These values are about 2.7-fold higher than that of the pure MnO2 film and about 1.4-fold higher than that of the Ag-doped MnO2 film made without using surfactants. |
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