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Related Concept Videos

Molecular and Ionic Solids02:54

Molecular and Ionic Solids

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Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
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Ionic Association01:28

Ionic Association

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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.
206
Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

45.6K
Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions. 
45.6K
Ionic Bonds00:42

Ionic Bonds

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Overview
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
112.6K
Aqueous Solutions and Heats of Hydration02:42

Aqueous Solutions and Heats of Hydration

14.1K
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...
14.1K
Solubility of Ionic Compounds02:55

Solubility of Ionic Compounds

66.3K
Solubility is the measure of the maximum amount of solute that can be dissolved in a given quantity of solvent at a given temperature and pressure. Solubility is usually measured in molarity (M) or moles per liter (mol/L). A compound is termed soluble if it dissolves in water.
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Updated: Apr 23, 2026

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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Destructuring ionic liquids in ionogels: enhanced fragility for solid devices.

A Guyomard-Lack1, P-E Delannoy, N Dupré

  • 1Institut des Matériaux Jean Rouxel (IMN) - CNRS - Université de Nantes - 2, rue de la Houssinière, B.P. 32229, 44322 Nantes Cedex 3, France. jean.lebideau@cnrs-imn.fr.

Physical Chemistry Chemical Physics : PCCP
|October 1, 2014
PubMed
Summary
This summary is machine-generated.

Confining ionic liquids with lithium salt in silica hosts improves conductivity by breaking down ion aggregation at interfaces. This "destructuration" enhances fragility, leading to better performance in solid-state devices like batteries.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Physical Chemistry

Background:

  • Ionic liquids (ILs) are promising electrolytes but often suffer from low conductivity in solid-state applications.
  • Confining ILs within host matrices can modify their properties, potentially improving performance.

Purpose of the Study:

  • To investigate the effect of confining ionic liquids with lithium salt in silica host networks on their properties.
  • To understand the interfacial interactions between ILs, lithium ions, and the silica matrix.

Main Methods:

  • Ionic conductivity measurements.
  • Raman spectroscopy of the TFSI anion.
  • Nuclear Magnetic Resonance (NMR) spectroscopy of the lithium cation.

Main Results:

  • Confining ILs with lithium salt in silica enhanced fragility and ionic conductivity.
  • Lithium ions showed segregative interactions with the SiO2 host matrix.
  • IL/SiO2 interfaces led to a breakdown of aggregated regions, reducing relaxation times and viscosity.

Conclusions:

  • The "destructuration" of ion pairs at IL/SiO2 interfaces enhances ionic conductivity.
  • Confined ILs in ionogels offer a competitive alternative to solid ionic conductors for devices like lithium batteries and supercapacitors.