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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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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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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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Ranc, Vaclav
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (4/4 displayed)
- 2021Covalent Graphene-MOF Hybrids for High-Performance Asymmetric Supercapacitorscitations
- 2018Ultrathin hierarchical porous carbon nanosheets for high-performance supercapacitors and redox electrolyte energy storagecitations
- 2018Ultrathin hierarchical porous carbon nanosheets for high-performance supercapacitors and redox electrolyte energy storagecitations
- 2018Ultrathin hierarchical porous carbon nanosheets for high‐performance supercapacitors and redox electrolyte energy storagecitations
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article
Covalent Graphene-MOF Hybrids for High-Performance Asymmetric Supercapacitors
Abstract
<p>In this work, the covalent attachment of an amine functionalized metal-organic framework (UiO-66-NH<sub>2</sub> = Zr<sub>6</sub>O<sub>4</sub>(OH)<sub>4</sub>(bdc-NH<sub>2</sub>)<sub>6</sub>; bdc-NH<sub>2</sub> = 2-amino-1,4-benzenedicarboxylate) (UiO-Universitetet i Oslo) to the basal-plane of carboxylate functionalized graphene (graphene acid = GA) via amide bonds is reported. The resultant GA@UiO-66-NH<sub>2</sub> hybrid displayed a large specific surface area, hierarchical pores and an interconnected conductive network. The electrochemical characterizations demonstrated that the hybrid GA@UiO-66-NH<sub>2</sub> acts as an effective charge storing material with a capacitance of up to 651 F g<sup>−1</sup>, significantly higher than traditional graphene-based materials. The results suggest that the amide linkage plays a key role in the formation of a π-conjugated structure, which facilitates charge transfer and consequently offers good capacitance and cycling stability. Furthermore, to realize the practical feasibility, an asymmetric supercapacitor using a GA@UiO-66-NH<sub>2</sub> positive electrode with Ti<sub>3</sub>C<sub>2</sub>T<sub>X</sub> MXene as the opposing electrode has been constructed. The cell is able to deliver a power density of up to 16 kW kg<sup>−1</sup> and an energy density of up to 73 Wh kg<sup>−1</sup>, which are comparable to several commercial devices such as Pb-acid and Ni/MH batteries. Under an intermediate level of loading, the device retained 88% of its initial capacitance after 10 000 cycles.</p>