2023
ACL
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Liyuan Liu, Encarnacion Raymundo-Piñero, Pierre-Louis Taberna and Patrice Simon, 'Electrochemical Characterizations of Ti3C2Tx MXene Prepared via Molten Salt Etching Route in Acetonitrile-based Electrolyte', Electrochem. Commun. 148 107453 (2023) doi:10.1016/j.elecom.2023.107453
Two-dimensional metal carbide and nitride materials (MXenes) with controlled Cl- and O-surface terminations
(MS-Ti3C2Tx) 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-Ti3C2Tx 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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