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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Ali, M. A. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Patil, Santosh
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Publications (4/4 displayed)
- 2023Enhanced Wear Resistance in Carbon Nanotube-Filled Bio-Epoxy Composites: A Comprehensive Analysis via Scanning Electron Microscopy and Atomic Force Microscopycitations
- 2023BiVO4 as a Sustainable and Emerging Photocatalyst: Synthesis Methodologies, Engineering Properties, and Its Volatile Organic Compounds Degradation Efficiencycitations
- 2017Mimics of microstructures of Ni substituted Mn1-xNixCo2O4 for high energy density asymmetric capacitorscitations
- 2014Evolution of enzyme catalysts caged in biomimetic gel-shell beadscitations
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article
Mimics of microstructures of Ni substituted Mn1-xNixCo2O4 for high energy density asymmetric capacitors
Abstract
The preparation of nanostructured hierarchical Mn<sub>1−x</sub>Ni<sub>x</sub>Co<sub>2</sub>O<sub>4</sub> metal oxides as efficient supercapacitors of different structures and configurations especially for the miniaturized electronics is still a challenge. In this context, we report template free facile hydrothermal synthesis of hierarchical nanostructured Mn<sub>1−x</sub>Ni<sub>x</sub>Co<sub>2</sub>O<sub>4</sub> with excellent supercapacitive performance. Significantly, the morphology of pure MnCo<sub>2</sub>O<sub>4</sub> transformed from 3D microcubes to 1D nanowires with incorporation of Ni. The electrochemical study shows highest specific capacitance i.e. 1762 F/g for Mn<sub>0.4</sub>Ni<sub>0.6</sub>Co<sub>2</sub>O<sub>4</sub> with high cycling stability of 89.2% which is much higher than pristine MnCo<sub>2</sub>O<sub>4</sub> and NiCo<sub>2</sub>O<sub>4</sub>. Later, asymmetric capacitor has been fabricated successfully using Mn<sub>0.4</sub>Ni<sub>0.6</sub>Co<sub>2</sub>O<sub>4</sub> nanowires as positive electrode and activated carbon (AC) as negative electrode in a KOH aqueous electrolyte. An asymmetric cell could be cycled reversibly in the high-voltage range of 0–1.5 V and displays intriguing performances with a specific capacitance of 112.8 F/g (6.87 F/cm<sup>3</sup>) and high energy density of 35.2 Wh/kg (2.1 mWh/cm<sup>3</sup>). Importantly, this asymmetric capacitor device exhibits an excellent long cycle life along with 83.2% specific capacitance retained after 2000 cycles.