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Related Concept Videos

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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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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Polymers02:34

Polymers

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The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
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Trends in Lattice Energy: Ion Size and Charge02:54

Trends in Lattice Energy: Ion Size and Charge

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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:
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Introduction to Electrolytes01:33

Introduction to Electrolytes

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In humans, electrolytes play a vital role in various physiological processes. Balancing electrolyte levels is essential for normal body functions; their imbalance can be life-threatening. The major electrolytes include sodium, potassium, chloride, calcium, phosphate, and bicarbonate. They are primarily involved in physiological processes, such as nerve signal transmission, membrane trafficking, muscle contraction, buffering body fluids, and balancing water levels in the body.
Role of Sodium
One...
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Common Ion Effect03:24

Common Ion Effect

47.1K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Châtelier’s principle. Consider the dissolution of silver iodide:
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

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A 3D Nanostructured Hydrogel-Framework-Derived High-Performance Composite Polymer Lithium-Ion Electrolyte.

Jiwoong Bae1, Yutao Li1, Jun Zhang1

  • 1Materials Science and Engineering Program and Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX, 78712, USA.

Angewandte Chemie (International Ed. in English)
|January 10, 2018
PubMed
Summary

Researchers developed a novel 3D nanostructured lithium lanthanum titanium oxide (LLTO) framework to enhance composite polymer electrolytes for safer lithium-ion batteries. This design overcomes nanofiller agglomeration, boosting ion conductivity.

Keywords:
composite electrolyteshydrogelslithium-ion conductorspercolationsolid electrolytes

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Solid-state electrolytes offer improved safety and stability for next-generation lithium-ion batteries compared to liquid electrolytes.
  • Composite polymer electrolytes show promise for Li-ion conductivity via nanofiller-polymer interactions, but nanofiller agglomeration hinders performance.
  • Developing effective strategies to prevent nanofiller aggregation is crucial for advancing solid-state battery technology.

Purpose of the Study:

  • To design and investigate a three-dimensional (3D) nanostructured hydrogel-derived Li0.35 La0.55 TiO3 (LLTO) framework as a 3D nanofiller.
  • To enhance the performance of composite polymer electrolytes for high-performance lithium-ion batteries.
  • To address the challenge of nanofiller agglomeration in composite polymer electrolytes.

Main Methods:

  • Fabrication of a 3D nanostructured hydrogel-derived LLTO framework.
  • Incorporation of the LLTO framework as a nanofiller in composite polymer electrolytes.
  • Systematic percolation study to analyze the structure-property relationship.

Main Results:

  • The 3D nanostructured LLTO framework effectively acted as a high-performance nanofiller.
  • The pre-percolating structure of the LLTO framework was identified as key to improved performance.
  • Achieved a Li-ion conductivity of 8.8×10-5 S cm-1 at room temperature.

Conclusions:

  • The developed 3D LLTO framework successfully mitigates nanofiller agglomeration in composite polymer electrolytes.
  • This approach significantly enhances Li-ion conductivity, paving the way for safer and more stable lithium-ion batteries.
  • The study demonstrates the potential of structured nanofillers in advancing solid-state electrolyte technology.