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Related Concept Videos

The Electrical Double Layer01:30

The Electrical Double Layer

In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
Theory of Strong Electrolytes01:23

Theory of Strong Electrolytes

The interionic forces of the strong electrolytes depend on the solvent's dielectric constant, which is the ability of a solvent to store electrical energy, based on its polarizability. and the solution's concentration. In high-dielectric solvents and in dilute solutions, weak electrostatic forces keep ions apart. However, in low-dielectric solvents or concentrated solutions, stronger interionic forces may cause ions to pair up as ionic doublets despite being fully ionized. The theory of strong...
The Debye–Hückel Theory of Electrolyte Solutions01:27

The Debye–Hückel Theory of Electrolyte Solutions

The Debye–Hückel theory, established by Peter Debye and Erich Hückel in 1923, is a fundamental concept in physical chemistry. It provides an understanding of the behavior of strong electrolytes in solution, particularly explaining their deviations from ideal behavior.The theory is based on Coulombic interactions (the attraction or repulsion between charged particles) between ions in solution. In an ionic solution, oppositely charged ions tend to attract each other. This means that cations...
Ionic Association01:28

Ionic Association

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.
Solvating Effects02:12

Solvating Effects

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...
Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

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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Updated: Jun 2, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
05:33

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

Modulating Solvation Structure and Electrical Double Layer via Anion-Additive Weak Interactions for High-Voltage

Xin Li1, Yu Bai1, Tao Ren1

  • 1School of Interdisciplinary Science, Beijing Institute of Technology, Beijing, People's Republic of China.

Angewandte Chemie (International Ed. in English)
|May 31, 2026
PubMed
Summary

Researchers developed a robust electrode-electrolyte interface (EEI) for high-voltage lithium metal batteries using a novel additive strategy. This enhances battery stability and energy density across a wide temperature range.

Keywords:
electrode‐electrolyte interphasehigh‐voltage electrolyteslithium metal batteryweak interactionswide‐temperature electrolytes

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Rapid in-silico Battery Electrolyte Electrochemical Reaction Generation using 3T-VASP Multi-Scale Energy Minimization
05:37

Rapid in-silico Battery Electrolyte Electrochemical Reaction Generation using 3T-VASP Multi-Scale Energy Minimization

Published on: August 22, 2025

Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • High-voltage lithium metal batteries offer superior energy density but suffer from unstable electrode-electrolyte interfaces (EEIs).
  • Interface instability limits the practical application and cycle life of these advanced energy storage systems.

Purpose of the Study:

  • To engineer a mechanically robust and flexible EEI for high-voltage lithium metal batteries.
  • To enhance the stability and performance of lithium metal batteries by controlling interfacial chemistry and structure.

Main Methods:

  • Synergistic regulation of solvation structure and electrical double layer (EDL) using DFOB- and 2-thiophenecarbonitrile (2-TC) in weakly solvating electrolytes.
  • Utilizing ion-dipole interactions and preferential co-adsorption to form a DFOB-enriched, solvent-deficient EDL.
  • In situ polymerization of 2-TC under an electric field to create a flexible polythiophene network within the EEI.

Main Results:

  • Formation of a LiF/LiBxOy-rich EEI with improved mechanical robustness and flexibility.
  • Stable cycling of Li||NCM811 batteries at 4.7 V over a wide temperature range (-20°C to 60°C).
  • High energy densities of 472 Wh kg-1 and 429 Wh kg-1 achieved in practical Li||NCM90 and Li||LiCoO2 pouch cells, respectively.

Conclusions:

  • The developed electrolyte additive strategy effectively stabilizes the EEI in high-voltage lithium metal batteries.
  • This approach enables high energy density and stable cycling performance, paving the way for next-generation energy storage solutions.