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Related Concept Videos

Aqueous Solutions and Heats of Hydration02:42

Aqueous Solutions and Heats of Hydration

Water and other polar molecules are attracted to ions. The electrostatic attraction between an ion and a molecule with a dipole is called an ion-dipole attraction. These attractions play an important role in the dissolution of ionic compounds in water.
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
Ionic Strength: Effects on Chemical Equilibria01:19

Ionic Strength: Effects on Chemical Equilibria

The addition of an inert ionic compound increases the solubility of a sparingly soluble salt. For example, adding potassium nitrate to a saturated solution of calcium sulfate significantly enhances the solubility of calcium sulfate. Le Châtelier's principle cannot predict this shift in the equilibrium. Instead, this could be explained in terms of changes in the effective concentration of the ions in solution in the presence of added inert salt.
In this solution, the primary cation—the calcium...
The Debye–Hückel Theory of Electrolyte Solutions01:27

The Debye–Hückel Theory of Electrolyte Solutions

The Debye–Hückel theory, established by Peter Debye and Erich Hückel in 1923, is a fundamental concept in physical chemistry. It provides an understanding of the behavior of strong electrolytes in solution, particularly explaining their deviations from ideal behavior.The theory is based on Coulombic interactions (the attraction or repulsion between charged particles) between ions in solution. In an ionic solution, oppositely charged ions tend to attract each other. This means that cations...
Ionic Association01:28

Ionic Association

The ionic association is the association of oppositely charged ions in an electrolyte solution to form ion pairs. Bjerrum defined ion pairs as two oppositely charged ions whose electrostatic attraction exceeds the thermal energy of the system, typically expressed as 2kT. Electrostatic attraction depends on ionic charge, separation distance, and the dielectric constant of the medium. Thermal energy, represented by kT, reflects the tendency of ions to move independently due to molecular motion.
Theory of Strong Electrolytes01:23

Theory of Strong Electrolytes

The interionic forces of the strong electrolytes depend on the solvent's dielectric constant, which is the ability of a solvent to store electrical energy, based on its polarizability. and the solution's concentration. In high-dielectric solvents and in dilute solutions, weak electrostatic forces keep ions apart. However, in low-dielectric solvents or concentrated solutions, stronger interionic forces may cause ions to pair up as ionic doublets despite being fully ionized. The theory of strong...
The Electrical Double Layer01:30

The Electrical Double Layer

In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...

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A Perspective on the Origin of High-Entropy Solid Electrolytes.

Feipeng Zhao1,2, Shumin Zhang1, Xueliang Sun1,3

  • 1Department of Mechanical and Materials Engineering, Western University, London, ON, N6A 5B9, Canada.

Advanced Materials (Deerfield Beach, Fla.)
|May 7, 2025
PubMed
Summary

The high-entropy (HE) approach enhances solid electrolytes (SEs) for all-solid-state batteries (ASSBs). This review clarifies the HE mechanism and its impact on SE properties, guiding future research.

Keywords:
Li superionic conductorshigh‐entropy materialsion migrationsolid electrolytessolid‐state batteries

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Solid-State Chemistry

Background:

  • Solid electrolytes (SEs) are crucial for all-solid-state batteries (ASSBs).
  • The high-entropy (HE) approach is a novel strategy to enhance SE performance.
  • Current understanding of HE mechanisms in SEs is limited.

Purpose of the Study:

  • To evaluate the fundamental principles of HE approaches in SEs.
  • To analyze the positive effects of HE on SE properties.
  • To identify limitations and guide future research in HE SEs.

Main Methods:

  • Review and analysis of existing literature on HE strategies for SEs.
  • Evaluation of compositional regulations and their impact on material properties.
  • Correlation of structural disorder and local structure evolution with performance enhancement.

Main Results:

  • HE strategies involve complex compositional tuning.
  • Enhanced properties arise from modulated system disorder and local structure evolution.
  • HE concept in SEs requires rigorous experimental validation and property correlation.

Conclusions:

  • The HE approach offers potential for high-performance SEs.
  • Further research is needed to establish clear correlations between HE structures and desired properties.
  • This perspective aims to stimulate discussion and exploration in HE SEs for ASSBs.