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Related Concept Videos

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The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
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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...
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Related Experiment Video

Updated: Mar 31, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Lanthanum-Enriched PEO-Based Composite Electrolytes Inducing Interface Passivation and the Ion-Sieving Effect.

Yini Chen1, Shuang Li1, Baorui Zhang1

  • 1School of Mechanical Engineering, Yeungnam University, Gyeongsan-si, Gyeongsangbuk-do 38541, South Korea.

ACS Applied Materials & Interfaces
|March 30, 2026
PubMed
Summary

Researchers developed a lanthanum-enriched polymer electrolyte for safer, high-energy lithium metal batteries. This novel material enhances ion transport and stability, overcoming key limitations of current solid electrolytes.

Keywords:
PEO-based solid electrolytesdendrite suppressionhigh-voltage solid-state batterieslanthanum-enriched composite electrolyterare-earth coordination chemistry

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Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites
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Area of Science:

  • Materials Science
  • Electrochemistry
  • Polymer Science

Background:

  • Poly(ethylene oxide) (PEO)-based solid electrolytes are crucial for safe, high-energy lithium metal batteries.
  • Current PEO electrolytes face challenges including low ionic conductivity, Li+-anion association, and limited oxidative stability.

Purpose of the Study:

  • To design a lanthanum-enriched PEO composite electrolyte (LP) for improved ion transport and interfacial stability.
  • To suppress Li+-anion association and enhance Li+ dissociation and migration using lanthanum formate molecular clusters (LaMe).

Main Methods:

  • Incorporation of lanthanum formate molecular clusters (LaMe) into PEO.
  • Density functional theory (DFT) calculations to investigate Li+-anion interactions and migration pathways.
  • Electrochemical characterization of ionic conductivity, transference number, and electrochemical stability window.
  • Testing of Li||Li symmetric cells and Li||LFP full cells for cycling stability and performance.

Main Results:

  • LP electrolyte achieved high ionic conductivity (1.67 × 10⁻⁴ S cm⁻¹ at 30 °C) and a Li⁺ transference number of 0.57.
  • Extended electrochemical stability window up to 4.5 V.
  • Stable Li plating/stripping for over 2000 h in symmetric cells and 94.61% capacity retention in full cells after 300 cycles.

Conclusions:

  • Lanthanum formate clusters effectively anchor anions and activate polymer chains, suppressing Li+-anion association.
  • The LP electrolyte demonstrates high-voltage tolerance, dendrite-free cycling, and long-term durability.
  • This offers a promising strategy for advanced solid-state lithium metal batteries.