基于表面改性MXene二维填料的铁电聚合物纳米复合材料电介质制备及其逾渗阈值/介电响应研究

doi:10.11896/cldb.25010199

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Abstract A nanocomposite with high dielectric constant based onP(VDF-TrFE) copolymer matrix was fabricated in the present work by using conductive two-dimensional (2-D) titanium carbide (Ti₃C₂) MXene with surface modification as filler. The produced dielectric nanocomposites were flexible and exhibited a dense and uniform microstructure. With a small amount of fillers, the extremely large specific surface area and high surface activity of the filler promoted an increase in nucleation density and crystallization rate, leading to a high crystallinity of 87.7% for the nanocomposites with a filler content of 1.5wt%. It was identified that the percolation threshold of Ti₃C₂ in P(VDF-TrFE) was dependent on the frequency of electric field, exhibiting a percolation threshold of 11.9wt% under a 100 Hz alternating electric field, significantly lower than that of composites using spherical conductor fillers reported previously. With a filler content of 10wt%, the nanocomposites exhibited high dielectric constant of ＞3 100 at 100 Hz associated with a loss of 0.8 far lower than other reported high-dielectric constant composites in relevant publications at the same frequency. The results of this work implicate 2-D MXenes as promising candidate for fabrication of foldable/wearable capacitors, sensors, and energy storage devices.

Key words： nanodielectrics composites MXene percolation threshold

Published: 10 July 2025 Online: 2025-07-21

CLC number:

TK02

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	TONG Yang
	WU Xinyu
	LIU Yang
	LIU Jiachen
	JU Shaoshuai
	Li Jungang
	Li Yuting
	HU Jifan

Cite this article:

TONG Yang,WU Xinyu,LIU Yang, et al. Preparation of Polymer-based Nanocomposites Using Surface Modified MXene 2-D Fillers and Their Percolation Threshold and Dielectric Response[J]. Materials Reports, 2025, 39(13): 25010199-7.

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https://www.mater-rep.com/EN/10.11896/cldb.25010199 OR https://www.mater-rep.com/EN/Y2025/V39/I13/25010199

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