Electrochemical Properties of Mo4VC4Tx MXene in Aqueous Electrolytes

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

3 Scopus Citations
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Author(s)

  • Faisal Rehman
  • Mohit Saraf
  • Teng Zhang
  • Ruocun Wang
  • Tridip Das
  • Zhengtang Luo
  • Yury Gogotsi

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)38053-38060
Journal / PublicationACS Applied Materials and Interfaces
Volume16
Issue number29
Online published15 Jul 2024
Publication statusPublished - 24 Jul 2024

Link(s)

Abstract

M5C4Tx MXenes represent the most recently discovered and least studied subfamily of out-of-plane ordered double transition metal carbides with 11 atomic layers, probably the thickest of all 2D materials. Molybdenum (Mo) and vanadium (V) in Mo4VC4Tx offer multiple oxidation states, making this MXene potentially attractive for electrochemical energy storage applications. Herein, we evaluated the electrochemical properties of Mo4VC4Tx free-standing thin films in acidic, basic, and neutral aqueous electrolytes and observed the highest gravimetric capacitance of 219 F g-1 at 2 mV s-1 in a 3 M H2SO4. Further, we investigated the intercalation states of four different cations (H+, Li+, Na+, and K+) in MXenes through ab initio molecular dynamics (AIMD) simulation and used density functional theory (DFT) calculations to assess the charge storage mechanisms in different electrolytes. These studies show hydrated Li+, Na+, and K+ ions forming an electric double layer (EDL) at the MXene surface as the primary charge storage mechanism. This work shows the promise of Mo4VC4Tx MXene for energy storage in aqueous electrolytes. © 2024 The Authors. Published by American Chemical Society.

Research Area(s)

  • AIMD simulation, aqueous electrolytes, DFT, Mo4VC4Tx MXene, supercapacitors

Citation Format(s)

Electrochemical Properties of Mo4VC4Tx MXene in Aqueous Electrolytes. / Hussain, Iftikhar; Rehman, Faisal; Saraf, Mohit et al.
In: ACS Applied Materials and Interfaces, Vol. 16, No. 29, 24.07.2024, p. 38053-38060.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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