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Related Concept Videos

Ion Exchange01:17

Ion Exchange

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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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Related Experiment Video

Updated: May 6, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Siloxy-Functionalized Gel Polymer Electrolyte for High-Temperature Stable Lithium-Ion Batteries.

Ji-Wan Kim1, Seung-Mo Koo2, Jusung Song1

  • 1Department of Chemical Engineering, Hanyang University, Seoul 04763, South Korea.

ACS Applied Materials & Interfaces
|May 4, 2026
PubMed
Summary

This study introduces a new gel polymer electrolyte (GPE) using SiO-PETA for enhanced high-temperature performance in lithium-ion batteries (LIBs). The novel GPE improves cycling stability and safety by preventing degradation at elevated temperatures.

Keywords:
HF scavenginggel polymer electrolytehigh temperature operationlithium-ion batteriessiloxy-functionalized cross-linkerthermal safety and stability

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Polymer Chemistry

Background:

  • The growing demand for electric vehicles and energy storage necessitates lithium-ion batteries (LIBs) with improved high-temperature performance.
  • Conventional liquid electrolytes in LIBs degrade significantly at elevated temperatures, limiting their operational range and safety.
  • Developing advanced electrolytes is crucial for enabling reliable LIB function under harsh thermal conditions.

Purpose of the Study:

  • To develop a multifunctional gel polymer electrolyte (GPE) that enhances the high-temperature cycling stability and safety of lithium-ion batteries.
  • To investigate the role of a siloxy-functionalized cross-linker, SiO-PETA, in mitigating electrolyte and electrode degradation at elevated temperatures.
  • To demonstrate the superior performance of the GPE in a practical LIB cell under demanding thermal conditions.

Main Methods:

  • Synthesized a gel polymer electrolyte (GPE) incorporating a siloxy-functionalized cross-linker, siloxy-pentaerythritol triacrylate (SiO-PETA).
  • Incorporated the GPE into graphite/LiNi0.6Co0.2Mn0.2O2 pouch-type lithium-ion battery cells.
  • Evaluated the high-temperature cycling stability, safety characteristics (thermal stability, flammability), and degradation mechanisms of the GPE-based cells compared to conventional liquid-electrolyte cells.

Main Results:

  • The SiO-PETA based GPE effectively scavenges corrosive HF, reducing transition metal dissolution and cell degradation.
  • The cross-linked polymer matrix in the GPE suppresses parasitic reactions and electrolyte vaporization at high temperatures.
  • GPE-based LIB cells demonstrated superior capacity retention at 70 °C and enhanced safety, including stable open-circuit voltage at 150 °C and reduced flammability.

Conclusions:

  • The developed SiO-PETA based GPE significantly improves the high-temperature cycling stability and safety of lithium-ion batteries.
  • This novel GPE effectively mitigates electrolyte and electrode degradation pathways that limit performance at elevated temperatures.
  • The findings pave the way for developing more robust and reliable LIBs for demanding applications, including electric vehicles and grid storage.