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Related Concept Videos

Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

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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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Ionic Crystal Structures

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Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
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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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Updated: Nov 17, 2025

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Layered Heterostructure Ionogel Electrolytes for High-Performance Solid-State Lithium-Ion Batteries.

Woo Jin Hyun1, Cory M Thomas1, Norman S Luu1

  • 1Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA.

Advanced Materials (Deerfield Beach, Fla.)
|February 17, 2021
PubMed
Summary

New ionogel electrolytes with a layered heterostructure enhance solid-state lithium-ion battery performance. This breakthrough expands electrochemical windows for high-energy applications, improving battery stability and cycling.

Keywords:
electrochemical stability windowion gelsionic liquidslithium-ion batteriessolid-state electrolytes

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Battery Technology

Background:

  • Ionogel electrolytes offer advantages for solid-state lithium-ion batteries, including safety and processability.
  • Current limitations include narrow electrochemical windows due to the lack of ionic liquids stable at both high and low potentials.
  • This restricts their use in high-energy-density applications.

Purpose of the Study:

  • To develop novel ionogel electrolytes with an extended electrochemical window.
  • To improve the performance and stability of solid-state lithium-ion batteries.
  • To enable high-energy-density applications through advanced electrolyte design.

Main Methods:

  • Fabrication of ionogel electrolytes with a layered heterostructure using imidazolium ionic liquids and a hexagonal boron nitride nanoplatelet matrix.
  • Combination of high-potential (>5 V vs Li/Li+) and low-potential (<0 V vs Li/Li+) ionic liquids within the matrix.
  • Characterization of electrochemical windows, ionic conductivity, and performance in full-cell solid-state lithium-ion batteries.

Main Results:

  • The layered heterostructure ionogel electrolytes exhibit extended electrochemical windows.
  • High ionic conductivity (>1 mS cm-1 at room temperature) is maintained.
  • Full-cell batteries using these electrolytes demonstrate higher operating voltages and enhanced cycling stability compared to conventional ionogels.

Conclusions:

  • Layered heterostructure ionogel electrolytes overcome the limitations of single-potential ionic liquids.
  • These advanced electrolytes significantly enhance the stability and cycling performance of solid-state lithium-ion batteries.
  • This development paves the way for next-generation high-energy-density energy storage solutions.