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Related Experiment Video

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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

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Sublattice melting in binary superionic colloidal crystals.

Yange Lin¹, Monica Olvera de la Cruz²

¹Department of Chemistry, Northwestern University, Evanston, Illinois 60208, USA.

Physical Review. E

|April 16, 2020

Summary

This summary is machine-generated.

Colloidal crystals with asymmetric particles exhibit sublattice melting, forming a novel superionic phase. This discovery offers new pathways for designing advanced solid-state electrolytes with tunable properties.

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Area of Science:

Materials Science
Condensed Matter Physics
Colloid Science

Background:

Superionic compounds exhibit high ionic conductivity due to one component premelting.
Solid-state electrolytes are crucial for advanced energy storage applications.

Purpose of the Study:

To investigate sublattice melting in colloidal crystals with asymmetric particle sizes and charges.
To explore the formation of superionic phases in these colloidal systems.

Main Methods:

Creation of colloidal crystals from oppositely charged, highly asymmetric particles in salt solutions.
Temperature-dependent analysis to induce and observe sublattice melting.

Main Results:

Observed sublattice melting in colloidal crystals, leading to a superionic phase.
Formation of nonelectroneutral stoichiometric ratios in the superionic colloidal crystals.
Generation of structures with multiple ionic crystal domains within percolated superionic phases.

Conclusions:

Sublattice melting in colloidal systems provides a new route to superionic phases.
These findings enable the design of solid-state electrolytes with adjustable stoichiometries and enhanced ionic conductivity.