This dissertation focuses on the study of the superionic state in multicomponent systems, where the smaller component exhibits delocalization and mobility while still maintaining system compactness through component attractions. Superionic behavior is widely observed in various systems and plays a crucial role in ceramic superionic conductors, which offer high ion conductivities comparable to liquid electrolytes while ensuring enhanced safety. Consequently, comprehending the superionic state and effectively controlling the superionic transition hold both scientific and practical significance, particularly in the development of solid-state batteries. Recent advancements have revealed superionic behaviors in nanoparticle assemblies with asymmetric size, thereby expanding the scope of nanoparticle engineering and proposing colloidal assemblies as potential models for investigating the superionic state. This dissertation employs computer simulations to explore the superionic state in a binary colloidal crystal formed by highly asymmetric components in terms of size and charge. The research investigates the structural and dynamic properties of the crystal concerning temperature variations, changes in solution concentration, and the application of an external electric field. These preliminary efforts deepen our understanding of superionics and establish a theoretical framework for the improved design of superionic conductors.

Creator

• Lin, Yange

DOI

• https://doi.org/10.21985/n2-d1z0-g587

Subject

• Physical chemistry
• Chemistry
• Condensed matter physics

Language

• en

Alternate Identifier

• http://dissertations.umi.com/northwestern:16697
• etdadmin_upload_1009942

Keyword

• electrostatics
• charge transport
• sublattice melting
• phase transition
• superionic behaviors
• colloidal crystals

Date created

• 2023-01-01

Resource type

• Dissertation

Rights statement

• In Copyright