Application of Ni/Co-based metal–organic frameworks (MOFs) as an advanced electrode material for supercapacitors. (26th September 2016)

• Record Type: Journal Article
• Authors: Gholipour-Ranjbar, Habib; Soleimani, Mohammad; Naderi, Hamid Reza
• Is Part Of: New journal of chemistry. Volume 40:Number 11(2016:Nov.)
• Page Start: 9187
• Page End: 9193
• Publication Date: 2016-09-26
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c6nj01449f
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : A Ni/Co–MOF-based supercapacitor electrode exhibited high specific capacitance, and good rate and cycling performance. Abstract : A Ni/Co-based bimetallic metal–organic framework (Ni/Co–MOF) [CoNi(μ3 -tp)2 (μ2 -pyz)2 ] (tp = terephthalic acid and pyz = pyrazine) was synthesized through a hydrothermal method. Structural characterization revealed that metal centers are equally occupied by Co 2+ and Ni 2+ 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.