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Covalent Graphene-M...
Covalent Graphene-MOF Hybrids for High-Performance Asymmetric Supercapacitors
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Jayaramulu, K. (författare)
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Horn, M. (författare)
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Schneemann, A. (författare)
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visa fler...
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Saini, H. (författare)
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Bakandritsos, A. (författare)
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Ranc, V. (författare)
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Petr, M. (författare)
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Stavila, V. (författare)
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Narayana, C. (författare)
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Scheibe, B. (författare)
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Kment, Š. (författare)
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Otyepka, M. (författare)
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Motta, N. (författare)
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Dubal, D. (författare)
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Zbořil, R. (författare)
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Fischer, R. A. (författare)
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- 2020-12-04
- 2021
- Engelska.
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Ingår i: Advanced Materials. - : Wiley-VCH Verlag. - 0935-9648 .- 1521-4095. ; 33:4
- Relaterad länk:
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https://onlinelibrar...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- In this work, the covalent attachment of an amine functionalized metal-organic framework (UiO-66-NH2 = Zr6O4(OH)4(bdc-NH2)6; bdc-NH2 = 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-NH2 hybrid displayed a large specific surface area, hierarchical pores and an interconnected conductive network. The electrochemical characterizations demonstrated that the hybrid GA@UiO-66-NH2 acts as an effective charge storing material with a capacitance of up to 651 F g−1, 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-NH2 positive electrode with Ti3C2TX MXene as the opposing electrode has been constructed. The cell is able to deliver a power density of up to 16 kW kg−1 and an energy density of up to 73 Wh kg−1, 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. © 2020 The Authors. Advanced Materials published by Wiley-VCH GmbH
Nyckelord
- 2D materials
- asymmetric supercapacitors
- covalent assemblies
- metal-organic frameworks
- MXenes
- Amides
- Capacitance
- Carboxylation
- Charge transfer
- Electrodes
- Hybrid materials
- Organic polymers
- Organometallics
- Supercapacitor
- Asymmetric supercapacitor
- Conductive networks
- Conjugated structures
- Covalent attachment
- Electrochemical characterizations
- Functionalized graphene
- Large specific surface areas
- Positive electrodes
- Graphene
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Jayaramulu, K.
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Horn, M.
-
Schneemann, A.
-
Saini, H.
-
Bakandritsos, A.
-
Ranc, V.
-
visa fler...
-
Petr, M.
-
Stavila, V.
-
Narayana, C.
-
Scheibe, B.
-
Kment, Š.
-
Otyepka, M.
-
Motta, N.
-
Dubal, D.
-
Zbořil, R.
-
Fischer, R. A.
-
visa färre...
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