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Dynamic Mosaicity Modulates Ion Transport in Stimuli-Responsive Liquid Crystal Electrolytes.

Hélène Pung1, Celso Yassuo Okada-Junior2, Mirella Simões Santos3

  • 1Univ. Grenoble Alpes, CNRS, CEA, Grenoble-INP, IRIG, SyMMES, Grenoble, 38000, France.

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Structural mosaicity in ionic liquid crystals significantly impacts ion transport, enabling tunable conductivity. This research provides a framework for designing advanced electrolytes for energy devices by controlling material structure.

Keywords:
anisotropic ionic transportdynamic mosaicityin situ/operando correlationsnanoscale confinementsupramolecular orderingthermotropic ionic liquid crystals

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Area of Science:

  • Materials Science
  • Soft Matter Physics
  • Electrochemistry

Background:

  • Structural mosaicity and defects are crucial for material properties but challenging to study in soft matter electrolytes.
  • Understanding ion transport in these materials requires advanced characterization techniques.

Purpose of the Study:

  • To investigate the relationship between structural mosaicity and ion transport in soft matter electrolytes.
  • To develop a model system for probing and exploiting structural features in ion conduction.
  • To establish a structure-function framework for designing adaptive electrolyte systems.

Main Methods:

  • Utilized a dimensionally tunable model system based on thermotropic ionic liquid crystals (TILCs).
  • Employed in situ and operando synchrotron X-ray scattering.
  • Conducted electrochemical analyses to correlate structure with ion transport.
  • Applied a 1 Tesla magnetic field to study stimuli-responsive behavior.

Main Results:

  • Demonstrated significant ion transport anisotropy (up to 10^4) in 2D anion-conducting smectic TILCs due to ion confinement.
  • Established a strong correlation between long-range supramolecular organization (dynamic mosaicity) and mesoscopic ion transport.
  • Showed that a magnetic field enhances domain size and conductivity, indicating stimuli-responsive control.
  • Quantified ion confinement within 0.7-1.2 nm thick lamellar sublayers.

Conclusions:

  • Dynamic mosaicity is a key design parameter for controlling ion transport in soft materials.
  • The findings establish a generalizable framework for confined ion conduction, applicable to various soft materials and biological systems.
  • This work lays the foundation for developing adaptive, self-organized electrolytes for energy storage, ionotronics, and bioinspired devices.