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Ion Exchange01:17

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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...
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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.
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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. 
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Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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Zwitterionic Materials for Enhanced Battery Electrolytes.

Mossab K Alsaedi1, Bricker D Like1, Karl W Wieck1

  • 1Department of Chemical & Biological Engineering, Tufts University, 4 Colby Street, Medford, MA 02155, USA.

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|January 22, 2024
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Summary
This summary is machine-generated.

Zwitterions (ZIs) enhance battery electrolytes by improving ion transport and stability. Exploring diverse ZI materials offers potential for next-generation battery designs.

Keywords:
Coulombic cross-linkscharged functional groupselectrochemical energy storageionic conductivitymaterials design

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Chemical Engineering

Background:

  • Zwitterions (ZIs) are molecules with balanced positive and negative charges, exhibiting significant dipole moments.
  • These properties enable ZIs to influence electrolyte characteristics beneficially.
  • ZIs are explored as additives in various battery electrolyte systems.

Purpose of the Study:

  • To summarize advances in using zwitterions to enhance battery electrolyte performance.
  • To highlight the role of zwitterions in ionic liquid-based, conventional solvent-based, and solid matrix-based electrolytes.
  • To underscore the potential of zwitterions for future battery technologies.

Main Methods:

  • Review of historical and recent research on zwitterion applications in electrolytes.
  • Analysis of zwitterion-induced phenomena such as increased salt dissociation and ordered ion transport pathways.
  • Examination of zwitterions' impact on electrochemical stability and battery cycling.

Main Results:

  • Zwitterions improve salt dissociation and create ordered ion transport pathways.
  • Enhanced mechanical robustness and electrochemical stability at interfaces are observed.
  • Zwitterions contribute to longer battery cycling life.

Conclusions:

  • Zwitterions significantly improve the performance of diverse battery electrolytes.
  • Further exploration of zwitterion chemistry and electrolyte pairings is crucial.
  • Zwitterions are key to developing advanced next-generation batteries.