Journal
NEW JOURNAL OF CHEMISTRY
Volume 40, Issue 11, Pages 9187-9193Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6nj01449f
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- Research Council of Novin Ebtekar Company
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A Ni/Co-based bimetallic metal-organic framework (Ni/Co-MOF) [CoNi(mu(3)-tp)(2)(mu(2)-pyz)(2)] (tp = terephthalic acid and pyz = pyrazine) was synthesized through a hydrothermal method. Structural characterization revealed that metal centers are equally occupied by Co2+ and Ni2+ ions. The supercapacitive behavior of the synthesized Ni/Co-MOF was evaluated using cyclic voltammetry (CV), galvanostatic charge/ discharge, and electrochemical impedance spectroscopy (EIS) measurements in 3 M KOH as electrolyte. The Ni/Co-MOF exhibited an outstanding specific capacitance of 1049 F g(-1) at a discharge current density of 1 A g(-1), good rate capability (642 F g(-1) at 10 A g(-1)), and 97.4% capacitance retention after 5000 cycles. To the best of our knowledge, this is the first bimetallic MOF that is used in supercapacitors and its encouraging properties indicate that Ni/Co-MOF can be a promising candidate as an advanced electrode material for supercapacitors.
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