In-situ electrochemical XRD and raman probing of ion transport dynamics in ionic liquid-etched Ti3C2Tx MXene for energy storage applications

Jeremiah Hao Ran Huang, Shih Wen Tseng, I. Wen Peter Chen

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Abstract

This study focuses on understanding the electrochemical behavior of Ti3C2Tx MXene synthesized using tetramethylammonium tetrafluoroborate (TMATFB) as an etching agent for the Ti3AlC2 MAX phase. Through in situ Raman spectroscopy and X-ray diffraction (XRD), we investigate the charge storage mechanisms and surface transformations of TMATFB-etched MXene. The results indicate that Ti3C2Tx MXene undergoes reversible H+ ion intercalation, achieving a specific capacitance of 417.4F/g at 1 mV/s in 1 M H2SO4. This reversible process is characterized by a transformation between Ti3C2O2 and Ti3C2(OH)2 on the MXene surface, highlighting the role of oxygen-rich functional groups in enhancing pseudocapacitive behavior. These insights contribute to the understanding of MXene's electrochemical potential in energy storage systems.

Original languageEnglish
Article number158232
JournalChemical Engineering Journal
Volume503
DOIs
Publication statusPublished - 2025 Jan 1

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Environmental Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering

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