In-situ grown metal-organic framework derived CoS-MXene pseudocapacitive asymmetric supercapacitors

M. Adil, Abdul Ghani Olabi, Mohammad Ali Abdelkareem*, Hussain Alawadhi, Ahmed Bahaa, Khaled ElSaid, C. Rodriguez

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Since 2D MXene offers high conductivity and high redox-active sites making it an excellent candidate for supercapacitors (SCs). On the other hand, metal-organic frameworks (MOF) derived 3D nanospheres like CoS have their own distinctive merits such as high porosity, abundant active sites, large surface area, and superior electrochemical properties. Herein, a novel strategy has been opted to fabricate MXene cobalt sulfide (MXene-CoS). For the first time MOF derived CoS nanostructures were successfully incorporated with MXene flakes and grown on porous nickel foam. Consequently, the electroactivity of the as-prepared electrodes was enhanced by dwindling the ion-electron diffusion pathways. MXene-CoS/AC asymmetric device operated at a wide potential window of 1.6 V which is among the widest for MXene based SCs. The prepared electrodes demonstrated ultra-high specific capacity of 447 mA h g−1 at a current density of 3 mA cm−2. The assembled MXene-CoS/AC ASC solid-state device manifested a high specific capacity of ~190 mA h g−1 and volumetric capacity of 1.2 mA h cm−3 at a current density of 2 mA cm−2. The presented strategy paves a way for a new dimension of MOF-derived metal sulfides incorporated with 2D MXene for high-performance SCs with excellent cyclic stability.
Original languageEnglish
Article number106537
Number of pages10
JournalJournal of Energy Storage
Volume60
Early online date11 Jan 2023
DOIs
Publication statusE-pub ahead of print - 11 Jan 2023

Keywords

  • MXene
  • supercapacitor
  • metal-organic frameworks
  • pseudocapacitive
  • cobalt sulfide

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