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A Solid State Zwitterionic Plastic Crystal With High Static Dielectric Constant.

Zitan Huang1, Yifan Liu2, Tiago Outerelo Corvo1

  • 1Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania, United States.

Advanced Materials (Deerfield Beach, Fla.)
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Summary
This summary is machine-generated.

Researchers developed a novel imidazolium-based zwitterion exhibiting a plastic crystal phase. This solid-state material shows a high dielectric constant, crucial for energy storage applications.

Keywords:
dielectric relaxationlong‐range orderrotational degree of freedom

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Area of Science:

  • Materials Science
  • Solid-State Chemistry

Background:

  • High dielectric constant solid materials are vital for energy storage.
  • Developing new materials with enhanced dielectric properties is an ongoing research area.

Purpose of the Study:

  • To design, synthesize, and characterize a novel imidazolium-based zwitterion.
  • To investigate its potential as a solid-state material for energy storage applications.

Main Methods:

  • Experimental characterization including thermal analysis (DSC) and morphology studies.
  • Computational evidence to support the plastic crystal phase determination.
  • Dielectric constant measurements at various temperatures.

Main Results:

  • The synthesized imidazolium-based zwitterion confirmed to possess a plastic crystal phase.
  • Observed solid-solid phase transition at -26°C and melting at 72°C.
  • Exhibited a very high dielectric constant (147 at -10°C, 103 at 70°C) in the plastic crystal state.

Conclusions:

  • The zwitterion's plastic crystal phase, characterized by weak intermolecular forces and rotational dynamics, leads to a high dielectric constant.
  • The material's stability within 50 K of ambient temperature makes it promising for practical applications.
  • This discovery offers new avenues for developing solid-state high dielectric constant materials for energy storage.