One-step electrochemical preparation and characterization of nanostructured hydrohausmannite as electrode material for supercapacitors
| Autor: | M. Ghannadi Maragheh, Mustafa Aghazadeh, Mohammad Reza Ganjali, Parviz Norouzi |
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| Rok vydání: | 2016 |
| Předmět: |
Supercapacitor
Materials science General Chemical Engineering Analytical chemistry chemistry.chemical_element One-Step 02 engineering and technology General Chemistry Manganese 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Capacitance 0104 chemical sciences chemistry Fourier transform infrared spectroscopy Cyclic voltammetry 0210 nano-technology Current density |
| Zdroj: | RSC Advances. 6:10442-10449 |
| ISSN: | 2046-2069 |
| Popis: | A novel, simple one-pot electrochemical procedure is proposed for the preparation of hydrohausmannite. The deposition experiments were performed in manganese chloride bath under a galvanostatic mode, applying a current density of 2 mA cm−2 (Ia = 2 mA cm−2). The structural characterizations with XRD and FTIR revealed the prepared sample to be composed of mixed Mn3O4 and MnOOH phases which is known as hydrohausmannite. Morphological evaluations by SEM and TEM further proved that the prepared sample had a nanoscale particle/plate morphology and the electrochemical measurements through cyclic voltammetry (CV) and charge–discharge techniques revealed that the prepared hydrohausmannite had an excellent capacitive behavior, with the specific capacitance values of 232, 209, 184, 133, 99 and 89 F g−1 were calculated at the scan rates of 5, 10, 20, 50, 100 and 125 mV s−1, respectively. An excellent long-term cycling stability of 92% was also observed after 1000 charge–discharge cycles. |
| Databáze: | OpenAIRE |
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