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Related Concept Videos

Trends in Lattice Energy: Ion Size and Charge02:54

Trends in Lattice Energy: Ion Size and Charge

23.9K
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
23.9K
Ionic Strength: Effects on Chemical Equilibria01:19

Ionic Strength: Effects on Chemical Equilibria

1.4K
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...
1.4K
Formation of Complex Ions03:45

Formation of Complex Ions

23.6K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
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Ion Exchange01:17

Ion Exchange

588
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
588
Electrolytes: van't Hoff Factor03:08

Electrolytes: van't Hoff Factor

33.1K
Colligative Properties of Electrolytes
The colligative properties of a solution depend only on the number, not on the identity, of solute species dissolved. The concentration terms in the equations for various colligative properties (freezing point depression, boiling point elevation, osmotic pressure) pertain to all solute species present in the solution. Nonelectrolytes dissolve physically without dissociation or any other accompanying process. Each molecule that dissolves yields one...
33.1K

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Updated: Jun 27, 2025

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Tuning Ion Mobility in Lithium Argyrodite Solid Electrolytes via Entropy Engineering.

Jing Lin1, Mareen Schaller2, Sylvio Indris2

  • 1Battery and Electrochemistry Laboratory (BELLA), Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.

Angewandte Chemie (International Ed. in English)
|May 6, 2024
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Summary

High-entropy solid electrolytes enhance ionic conductivity in solid-state batteries. This study links cationic disorder to improved lithium transport, achieving conductivities up to 18 mS/cm.

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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides
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Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides
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Area of Science:

  • Materials Science
  • Electrochemistry
  • Solid-State Chemistry

Background:

  • Solid electrolytes (SEs) are critical for advancing solid-state battery (SSB) technologies.
  • Multicomponent and high-entropy SEs show promise due to superior charge-transport properties.
  • Understanding the impact of configurational entropy on ionic conductivity in SEs is limited.

Purpose of the Study:

  • To investigate the relationship between configurational entropy and ionic conductivity in multication-substituted lithium argyrodites.
  • To explore how compositional design and occupational disorder affect ion mobility.
  • To demonstrate the potential of entropy engineering for enhancing ceramic ion conductors.

Main Methods:

  • Synthesis and characterization of Li6+x[M1aM2bM3cM4d]S5I argyrodites (M = P, Si, Ge, Sb).
  • Utilized diffraction techniques and solid-state nuclear magnetic resonance (ssNMR) spectroscopy.
  • Performed charge-transport measurements to determine ionic conductivity.

Main Results:

  • Established a direct correlation between cationic occupational disorder and lithium transport in the argyrodite lattice.
  • Achieved high bulk ionic conductivities up to 18 mS/cm at room temperature in optimized compositions.
  • Demonstrated that controlling configurational entropy via compositional design enhances ionic conductivity.

Conclusions:

  • Entropy engineering offers a viable strategy to improve ionic conductivity in ceramic ion conductors.
  • Overcoming compositional limitations is possible through strategic design of advanced electrolytes.
  • This research opens new pathways for developing high-performance solid-state batteries.