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Solid–solid interface growth of conductive metal–organic framework nanowire arrays and their supercapacitor application

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Abstract

The chemical vapour deposition (CVD) method has offered a new possibility of preparing metal–organic frameworks (MOFs). However, the reported MOF-CVD method is limited to the use of gaseous organic precursors, preventing the extension of the CVD method to a broad range of potential organic linkers. This study, for the first time, reports a dual-temperature zone CVD-assisted approach for the in situ growth of conductive Cu3(HHTP)2 (HHTP = 2,3,6,7,10,11-hexahydroxytriphenylene) nanowire arrays (NWAs) on the interface between a solid Cu foil and a solid organic precursor, overcoming the difficulties of high sublimation temperatures of organic ligands and low decomposition temperatures of conductive MOFs. In the process, oxygenated water (O-H2O) is the key to obtain crystalline Cu3(HHTP)2 NWAs, and the growth is described by a base-growth mode. A symmetrical supercapacitor based on Cu3(HHTP)2 NWAs on the Cu foil shows a high specific surface area normalized capacitance of 41.1 μF cm−2 for 0.5 A g−1, which is 2–5 times higher than those of most carbon materials. This study demonstrates the extension of the synthesis method from the previous liquid or gas based reaction to a solid–solid reaction, and this extension is expected to be very useful for the production of a broad range of conductive MOFs and their direct supercapacitor application.

Graphical abstract: Solid–solid interface growth of conductive metal–organic framework nanowire arrays and their supercapacitor application

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Publication details

The article was received on 15 Aug 2019, accepted on 19 Nov 2019 and first published on 20 Nov 2019


Article type: Research Article
DOI: 10.1039/C9QM00527G
Mater. Chem. Front., 2020, Advance Article

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    Solid–solid interface growth of conductive metal–organic framework nanowire arrays and their supercapacitor application

    X. Du, J. Zhang, H. Wang, Z. Huang, A. Guo, L. Zhao, Y. Niu, X. Li, B. Wu and Y. Liu, Mater. Chem. Front., 2020, Advance Article , DOI: 10.1039/C9QM00527G

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