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Journal Articles Electrochemistry Communications Year : 2023

Electrochemical characterization of Ti3C2T MXene prepared via a molten salt etching route in an acetonitrile-based electrolyte

Abstract

Two-dimensional metal carbide and nitride materials (MXenes) with controlled Cl-and O-surface terminations (MS-Ti 3 C 2 T x) were prepared by a molten salt etching route and their electrochemical properties were investigated in nitrile-based electrolytes. The results show that the power performance of MS-Ti 3 C 2 T x was greatly improved in acetonitrile (ACN)-based non-aqueous organic electrolytes, which are conventional electrolytes for electrochemical capacitors. The addition of a lithium salt to produce 2 M LiTFSI in ACN results in an increase in the specific capacitance. Moreover, replacing LiTFSI by LiFSI drastically improves the power performance of MXenes at a high scan rate (95 mAh g − 1 at 900C). These results highlight the importance of properly matching the electrolyte composition to the electrode material and shed light on MXenes as high-rate electrode materials for energy storage applications.
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Dates and versions

hal-04250910 , version 2 (20-10-2023)
hal-04250910 , version 1 (05-02-2024)

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Attribution - NonCommercial - NoDerivatives

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Liyuan Liu, Encarnacion Raymundo-Piñero, Pierre-Louis Taberna, Patrice Simon. Electrochemical characterization of Ti3C2T MXene prepared via a molten salt etching route in an acetonitrile-based electrolyte. Electrochemistry Communications, 2023, 148, pp.107453. ⟨10.1016/j.elecom.2023.107453⟩. ⟨hal-04250910v2⟩
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