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Electrolyte and Nonelectrolyte Solutions02:21

Electrolyte and Nonelectrolyte Solutions

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Substances that undergo either a physical or a chemical change in solution to yield ions that can conduct electricity are called electrolytes. If a substance yields ions in solution, that is, if the compound undergoes 100% dissociation, then the substance is a strong electrolyte. Complete dissociation is indicated by a single forward arrow. For example, water-soluble ionic compounds like sodium chloride dissociate into sodium cations and chloride anions in aqueous solution.
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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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Aqueous Solutions and Heats of Hydration02:42

Aqueous Solutions and Heats of Hydration

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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...
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Electrolytes: van't Hoff Factor03:08

Electrolytes: van't Hoff Factor

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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...
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Alkyl Halides02:45

Alkyl Halides

17.1K
Structural Properties
Alkyl halides are halogen-substituted alkanes wherein one or more hydrogen atoms of an alkane is replaced by a halogen atom such as fluorine, chlorine, bromine, or iodine. The carbon atom in an alkyl halide is bonded to the halogen atom, which is sp3-hybridized and exhibits a tetrahedral shape.
Unlike alkyl halides, compounds in which a halogen atom is bonded to an sp2 -hybridized carbon atom of a carbon-carbon double bond (C=C) are called vinyl halides. Whereas aryl...
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Ionic Strength: Overview01:12

Ionic Strength: Overview

1.6K
The ionic strength of a solution is a quantitative way of expressing the total electrolyte concentration of a solution. This concept was first introduced in 1921 by two American physical chemists, Gilbert N. Lewis and Merle Randall, while describing the activity coefficient of strong electrolytes. During the calculation of ionic strength (I or μ), all the cations and anions are considered. However, the concentration (c) of an ion with a greater charge number (z) has a greater contribution...
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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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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

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Room Temperature Halide-Eutectic Solid Electrolytes with Viscous Feature and Ultrahigh Ionic Conductivity.

Ruonan Xu1, Jingming Yao1, Ziqi Zhang1

  • 1Clean Nano Energy Center, State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, Hebei, 066004, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|October 26, 2022
PubMed
Summary
This summary is machine-generated.

Novel viscous halide-based deep eutectic solid electrolytes (DESEs) were synthesized using ball milling. These DESEs exhibit high ionic conductivity, enabling enhanced solid-state battery performance and super-dense composite pellets.

Keywords:
deep eutectic electrolyteshalidesionic conductivitysolid-state batteriesviscous solid electrolytes

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Solid-State Batteries

Background:

  • Viscous electrolytes improve solid-state battery assembly by enhancing solid-solid contact.
  • Developing efficient solid electrolytes is crucial for advancing battery technology.

Purpose of the Study:

  • To synthesize and characterize novel halide-based deep eutectic solid electrolytes (DESEs).
  • To evaluate the performance of DESEs in solid-state batteries.

Main Methods:

  • Facile ball milling method for DESE preparation.
  • Cryogenic techniques for chemical- and micro-structure analysis.
  • Integration with active materials to form composite cathodes.

Main Results:

  • DESEs exhibit diverse morphologies and viscous properties due to intermolecular interactions.
  • LiCl and LiF nanoparticles dispersed in an amorphous halide matrix facilitate fast ion transport.
  • Optimized DESE achieved high ionic conductivity (16 mS cm⁻¹) and low activation energy.
  • Composite cathodes with DESE showed significantly enhanced ionic conductivity.

Conclusions:

  • Halide-based DESEs are promising solid electrolytes for solid-state batteries.
  • The viscous nature and composition of DESEs contribute to improved ionic conductivity.
  • DESEs offer an attractive application prospect for high-performance energy storage devices.