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Open AccessArticle

Development of ZIF-Derived Nanoporous Carbon and Cobalt Sulfide-Based Electrode Material for Supercapacitor

1
US–Pakistan Center for Advanced Studies in Energy (USPCAS–E), National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan
2
School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan
*
Author to whom correspondence should be addressed.
Materials 2019, 12(18), 2940; https://doi.org/10.3390/ma12182940
Received: 8 July 2019 / Revised: 31 July 2019 / Accepted: 14 August 2019 / Published: 11 September 2019
(This article belongs to the Special Issue Advances in Electrochemical Energy Materials)
Zeolitic Imidazolate Framework (ZIF-67) was prepared in two different solvents—water and methanol. Nanoporous carbon was derived from ZIF-67 via pyrolysis in an inert atmosphere. Anion exchange step of sulfidation on the synthesized material has a great influence on the structure and properties. Structural morphology and thermal stability were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM)/energy dispersive x-ray spectroscopy (EDS), Brunauer-Emmett-Teller (BET), and thermogravimetric (TG) analysis. The electrochemical analysis was evaluated by cyclic voltammetry, chronopotentiometry, and impedance analysis. The as-prepared nanoporous carbon and cobalt sulfide (NPC/CS) electrode material (water) in 2M KOH electrolyte solution exhibit high specific capacitance of 677 F/g. The excellent electrochemical performance of the NPC/CS was attributed to its hierarchical structure. This functionalized ZIF driven strategy paves the way to the preparation of various metal oxide and metal sulfide-based nanoheterostructures by varying the type of metal. View Full-Text
Keywords: ZIF-67; water; methanol; sulfidation; specific capacitance ZIF-67; water; methanol; sulfidation; specific capacitance
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MDPI and ACS Style

Ahmad, R.; Iqbal, N.; Noor, T. Development of ZIF-Derived Nanoporous Carbon and Cobalt Sulfide-Based Electrode Material for Supercapacitor. Materials 2019, 12, 2940.

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