Elastic Anomalies in the 2D Van Der Waals Ti3C2Tx MXene: Possible Sliding Ferroelectricity and Ordering of Intercalated Halides

Francesco Cordero; Hanna Pazniak; Thierry Ouisse; Jesus Gonzalez-Julian; Aldo Di Carlo; Viktor Soprunyuk; Wilfried Schranz

doi:10.4028/p-Q3nTqf

Paper Titles

Elastic Anomalies in the 2D Van Der Waals Ti₃C₂T_x MXene: Possible Sliding Ferroelectricity and Ordering of Intercalated Halides
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Solid Solution of Metal Dopants in Semiconducting β-FeSi₂ Matrix
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Fabrication of ZnO-NiO Nanocomposite/ Nano-Crystalline Silicon Thin Film Solar Cell
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In-Flight Investigation of Floating Beads for Sloshing Mitigation for Liquid-Fueled Rockets
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Acoustic Insulation of Panels Made from Recycled Plastics and Resin
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Dynamics of Full Skyrmions in a Chiral Liquid Crystal
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 1062Elastic Anomalies in the 2D Van Der Waals Ti3C2Tx...

Elastic Anomalies in the 2D Van Der Waals Ti₃C₂T_x MXene: Possible Sliding Ferroelectricity and Ordering of Intercalated Halides

Abstract:

MXenes are 2D carbides and nitrides of transition metals whose layers are kept by van derWaals forces. These materials are generally metallic and easily intercalate several types ofmolecules and ions, so that they are studied for various types of applications, from energystorage to corrosion resistance. We measured the dynamic Young’s modulus of self-standingfilms of Ti3C2Tx with the free flexural resonance and with the DMA, finding evidence of a previouslyunnoticed phase transition at T_C = 350 K. In a previous paper it is argued that the transition should be related to the onset of sliding ferroelectricity. This is a new type of ferroelectricity known in bilayers of graphene, BN and few chalcogenides, with which ultrafast andstable ferroelectric memories have already been realized. If confirmed, Ti₃C₂T_x would the firstMXene exhibiting sliding ferroelctricity and metallic conduction. The present work is focusedon the effect of the intercalatation of molecules, mainly water, in the intralayer space. Theinterlayer nature of the transition at 350 K is demonstrated by suppressing it through intercalationof H2O. Preliminary results are also presented on composite Ti₃C₂Cl₂-KBr, where giantsoftening upon heating up to 800 K and a final stabilization with elastic anomalies around250 K might be due to intercalation of K and its subsequent ordering/disordering. This mightopen new perspectives in the study of the behaviour of intercalated ions in electrodes forsupercapacitors and batteries.

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Periodical:

Key Engineering Materials (Volume 1062)

Pages:

3-12

DOI:

https://doi.org/10.4028/p-Q3nTqf

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Online since:

August 2026

Authors:

Francesco Cordero*, Hanna Pazniak, Thierry Ouisse, Jesus Gonzalez-Julian, Aldo Di Carlo, Viktor Soprunyuk, Wilfried Schranz

Keywords:

Anelastic Relaxation, Intercalates, MXene, Sliding Ferroelectricity

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References

[1] A. Bhat, S. Anwer, K. S. Bhat, M. I. H. Mohideen, K. Liao, A. Qurashi, Prospects challenges and stability of 2D MXenes for clean energy conversion and storage applications, npj 2D Mater. Appl. 5 (2021) 61.