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High performance piezocomposites for flexible device application.

Xin Gao1, Mupeng Zheng1, Xiaodong Yan1

  • 1Key Laboratory of Advanced Functional Materials, Education Ministry of China, College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China. mpzheng@bjut.edu.cn zhumk@bjut.edu.cn.

Nanoscale
|February 20, 2020
PubMed
Summary
This summary is machine-generated.

Researchers developed high-performance flexible piezocomposites using particle alignment engineering. This novel approach achieved a record piezoelectric voltage coefficient (g33) in wearable devices, enhancing durability and sensitivity.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electrical Engineering

Background:

  • Flexible piezocomposites are crucial for durable wearable electronics.
  • Existing materials often face limitations in performance and durability.

Purpose of the Study:

  • To introduce particle alignment engineering for high-performance flexible piezocomposites.
  • To achieve a record-high piezoelectric voltage coefficient (g33) using this method.

Main Methods:

  • Utilizing dielectrophoresis (DEP) for particle alignment engineering.
  • Developing a composite of (Ba0.85Ca0.15)(Ti0.90Zr0.10)O3 (BCZT) particles within a polydimethylsiloxane (PDMS) matrix.

Main Results:

  • Achieved an ultrahigh piezoelectric voltage coefficient (g33) of 600 × 10-3 V m N-1, the highest reported for piezocomposites.
  • Demonstrated significantly improved poling electric voltage and stress-transfer capability.
  • Fabricated flexible piezoelectric touch sensors and wearable keyboards with excellent sensitivity and stability.

Conclusions:

  • Particle alignment engineering via DEP is a highly effective strategy for enhancing piezocomposite performance.
  • The developed BCZT/PDMS composite offers a promising pathway for advanced flexible wearable devices.
  • This work sets a new benchmark for piezoelectric voltage coefficients in flexible materials.