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Metal-Organic Frameworks Based on Halogen-bridged Dinuclear-Cu-nodes as Promising Materials for High Performance Supercapacitor Electrodes

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. And then, these MOF materials were applied as electrode active materials in supercapacitors. 1 presents high specific capacitance and good cycling stability in 6 M KOH electrolyte compared to 2. The maximum specific capacitance of 1 electrode could be reach at 1148 F g−1 at a current density of 0.5 A g−1 , along with the high capacitance of 90% retained after 2000 cycles at a current density of 10 A g−1 in 6M KOH solution. The successful introduction of halogen and hydroxyl ions into the final structures might be responsible for the high performance of supercapacitor, which makes these Cu MOFs as the candidate of electrode active material for electrochemical energy storage.

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Publication details

The article was accepted on 10 Nov 2017 and first published on 10 Nov 2017


Article type: Paper
DOI: 10.1039/C7CE01840A
Citation: CrystEngComm, 2017, Accepted Manuscript
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    Metal-Organic Frameworks Based on Halogen-bridged Dinuclear-Cu-nodes as Promising Materials for High Performance Supercapacitor Electrodes

    B. li, X. xiong, L. zhou, W. Cao, F. Yu, J. Liang, Y. Wang and S. Hu, CrystEngComm, 2017, Accepted Manuscript , DOI: 10.1039/C7CE01840A

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