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Enabling Polymer Single Crystals to Be High-Performance Dielectric.

Min Chen1, Wee-Liat Ong2, Boyu Peng1

  • 1MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.

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|December 30, 2023
PubMed
Summary

Highly ordered polymer lamellar single crystals (PLSCs) of polyethylene were created. These PLSC-based capacitors show superior dielectric properties, offering a new path for advanced dielectric materials.

Keywords:
DielectricsNano Capacitor DevicesPolyethylenePolymer Single Crystals

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Area of Science:

  • Materials Science
  • Polymer Science
  • Electrical Engineering

Background:

  • Semicrystalline polymer dielectrics (SPDs) are crucial for advanced applications, but their performance is limited by structural disorder.
  • Achieving homogeneous order in SPDs is challenging due to complex polymer crystallization behaviors.
  • Polymer lamellar single crystals (PLSCs) represent the most ordered form of SPDs, ideal for studying high-performance dielectric properties.

Purpose of the Study:

  • To investigate the potential of highly ordered polymer lamellar single crystals (PLSCs) as high-performance dielectric materials.
  • To develop a method for fabricating and characterizing PLSC-based dielectric devices.
  • To explore the dielectric properties of polyethylene PLSCs (PE PLSCs).

Main Methods:

  • Selected polyethylene (PE) as a model semicrystalline polymer dielectric.
  • Developed a method to obtain large, uniform, and high-quality PE PLSCs.
  • Devised a non-destructive strategy to construct PE PLSC-based vertical capacitors.

Main Results:

  • Successfully synthesized large, uniform, and high-quality PE PLSCs.
  • Fabricated nanometer-thick vertical capacitors using PE PLSCs.
  • Achieved exceptional dielectric properties: breakdown strength of 6.95 MV/cm and a dielectric constant of 2.14±0.07, surpassing neat PE.

Conclusions:

  • Highly ordered PE PLSCs exhibit superior dielectric performance compared to conventional PE.
  • PLSCs are promising platforms for developing next-generation high-performance dielectric materials.
  • This study provides insights into the performance limits of ordered semicrystalline polymer dielectrics.