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Related Concept Videos

Solvating Effects02:12

Solvating Effects

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An understanding of the solvating effect helps rationalize the relation between solvation and acidity of the compound. In addition, this also explains the relative stability of conjugate bases for compounds with different pKa values. This lesson details, in-depth, the principle of solvating effects. The strength of an acid and the stability of its corresponding conjugate base are determined using pKa values. This observed relationship is a consequence of solvation, which is the interaction...
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Intermolecular Forces03:13

Intermolecular Forces

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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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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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Ionic Strength: Effects on Chemical Equilibria01:19

Ionic Strength: Effects on Chemical Equilibria

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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...
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Ionic Bonds00:42

Ionic Bonds

121.2K
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...
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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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Updated: Sep 7, 2025

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Weak Cation-Solvent Interactions in Ether-Based Electrolytes Stabilizing Potassium-ion Batteries.

Jinfan Li1, Yanyao Hu1, Huabin Xie1

  • 1School of Physics and Electronics, Hunan University, Changsha, P. R. China.

Angewandte Chemie (International Ed. in English)
|June 17, 2022
PubMed
Summary
This summary is machine-generated.

Weakening ion-solvent interactions in electrolytes improves potassium-ion battery performance. This strategy enhances graphite anode stability, enables stable potassium metal plating, and boosts overall electrolyte oxidation resistance for advanced battery development.

Keywords:
Ether-Based ElectrolytesGraphite AnodesInterfacial ChemistryPotassium-Ion BatteriesWeak Ion-Solvent Interactions

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • Conventional ether-based electrolytes for potassium-ion batteries face challenges including low polarization voltage.
  • These electrolytes suffer from ion-solvent co-intercalation in graphite anodes, limiting performance.
  • Poor potassium-metal performance and restricted oxidation stability are also key drawbacks.

Purpose of the Study:

  • To investigate the impact of cation-solvent interactions on potassium-ion battery performance.
  • To suppress ion-solvent co-intercalation phenomena in graphite anodes.
  • To enhance potassium-metal cycling stability and improve electrolyte oxidation resistance.

Main Methods:

  • Formulating novel electrolytes with weakened cation-solvent interactions.
  • Evaluating graphite anode performance through K||graphite cell cycling.
  • Assessing potassium metal anode stability via K||Cu and K||K symmetric cell tests.
  • Determining electrolyte oxidation stability limits.

Main Results:

  • Graphite anode demonstrated stable K+ intercalation, retaining 86.6% capacity over 200 cycles.
  • Potassium metal anodes exhibited stable plating/stripping with 98.9% average Coulombic efficiency over 550 cycles.
  • Symmetric K||K cells operated over 1400 hours without dendrite formation, and electrolytes showed high oxidation stability up to 4.4 V.

Conclusions:

  • Weakening cation-solvent interactions effectively suppresses co-intercalation in graphite anodes.
  • This strategy significantly enhances potassium-metal battery performance and cycling stability.
  • The ion-solvent interaction tuning approach offers a promising pathway for developing high-performance potassium-ion battery electrolytes.