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Issue 47, 2017
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Metal–organic frameworks based on halogen-bridged dinuclear-Cu-nodes as promising materials for high performance supercapacitor electrodes

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Abstract

Two halogen-bridged di-nuclear Cu-based 3D porous metal–organic frameworks (MOFs), {[Cu2Cl(OH)(L)2]·(CH3OH)4}n (1) and {[Cu2Br(OH)(L)2]·(CH3OH)4}n (2), have been obtained via solvothermal methods with the bi-functional ligand (HL = 4,2′:6′,4′′-terpyridine-4′-carboxylic acid). These Cu-based frameworks exhibit similar two-interpenetrating frameworks, and 1D channels were left in the packing structures. These MOF materials were then applied as electrode active materials in supercapacitors. Compound 1 presents a high specific capacitance and good cycling stability in 6 M KOH electrolyte compared to 2. The maximum specific capacitance of electrode 1 could reach 1148 F g−1 at a current density of 0.5 A g−1, along with a high capacitance of 90% retained after 2000 cycles at a current density of 10 A g−1 in a 6 M KOH solution. The successful introduction of halogen and hydroxyl ions into the final structures might be responsible for the high performance of the supercapacitor, which makes these Cu MOFs a candidate for an electrode active material for electrochemical energy storage.

Graphical abstract: Metal–organic frameworks based on halogen-bridged dinuclear-Cu-nodes as promising materials for high performance supercapacitor electrodes

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Publication details

The article was received on 22 Oct 2017, accepted on 10 Nov 2017 and first published on 10 Nov 2017


Article type: Paper
DOI: 10.1039/C7CE01840A
Citation: CrystEngComm, 2017,19, 7177-7184
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    Metal–organic frameworks based on halogen-bridged dinuclear-Cu-nodes as promising materials for high performance supercapacitor electrodes

    X. Xiong, L. Zhou, W. Cao, J. Liang, Y. Wang, S. Hu, F. Yu and B. Li, CrystEngComm, 2017, 19, 7177
    DOI: 10.1039/C7CE01840A

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