Covalent Graphene-MOF Hybrids for High-Performance Asymmetric Supercapacitors

Covalent Graphene-MOF Hybrids for High-Performance Asymmetric Supercapacitors

© 2020 The Authors. Advanced Materials published by Wiley-VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 33(2021), 4 vom: 25. Jan., Seite e2004560
1. Verfasser: Jayaramulu, Kolleboyina (VerfasserIn)
Weitere Verfasser: Horn, Michael, Schneemann, Andreas, Saini, Haneesh, Bakandritsos, Aristides, Ranc, Vaclav, Petr, Martin, Stavila, Vitalie, Narayana, Chandrabhas, Scheibe, Błażej, Kment, Štěpán, Otyepka, Michal, Motta, Nunzio, Dubal, Deepak, Zbořil, Radek, Fischer, Roland A
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2021
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article 2D materials MXenes asymmetric supercapacitors covalent assemblies metal-organic frameworks
Beschreibung
Zusammenfassung:© 2020 The Authors. Advanced Materials published by Wiley-VCH GmbH.
In this work, the covalent attachment of an amine functionalized metal-organic framework (UiO-66-NH2  = Zr6 O4 (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 GAUiO-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 Ti3 C2 TX 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
Beschreibung:Date Revised 13.10.2024
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.202004560