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High-performance piezoelectric composites via β phase programming.

Yuanjie Su1, Weixiong Li1, Xiaoxing Cheng2

  • 1State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, 610054, Chengdu, China.

Nature Communications
|August 18, 2022
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Summary
This summary is machine-generated.

Ti3C2Tx MXene anchoring enhances polymer-ceramic piezoelectric composites by improving dipole alignment and spontaneous polarization. This boosts piezoelectric response for advanced wearable electronics like foot sensors.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Piezoelectric Materials

Background:

  • Polymer-ceramic piezoelectric composites offer combined flexibility and piezoelectricity.
  • Limited crystallinity and weak spontaneous polarization hinder their performance.
  • Developing strategies to enhance piezoelectric activity is crucial for applications.

Purpose of the Study:

  • To develop a Ti3C2Tx MXene anchoring method to improve intermolecular interactions in polymer-ceramic composites.
  • To enhance the piezoelectric activity and spontaneous polarization of these composites.
  • To create high-performance piezoelectric nanofibers for wearable electronics.

Main Methods:

  • Phase-field simulation and molecular dynamics calculations to study interfacial interactions.
  • Utilizing OH surface terminations on Ti3C2Tx for hydrogen bonding with a fluoropolymer matrix.
  • Employing electrospinning to fabricate composite nanofibers with Ti3C2Tx nanosheets.

Main Results:

  • Ti3C2Tx nanosheets with OH terminations promote dipole alignment and enhance spontaneous polarization through hydrogen bonding.
  • The piezoelectric response of samarium-doped Pb(Mg1/3Nb2/3)O3-PbTiO3/polyvinylidene fluoride composite nanofibers increased by 160% with Ti3C2Tx inclusion.
  • The developed nanofibers exhibit excellent piezoelectric and mechanical properties.

Conclusions:

  • Interfacial coupling via intermolecular anchoring is an effective strategy for high-performance piezoelectric composites.
  • The Ti3C2Tx anchoring method significantly boosts piezoelectric response.
  • The piezoelectric nanofibers are suitable for integration into wearable electronics, such as foot sensors for gait monitoring and health prognosis.