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Related Concept Videos

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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Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
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Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
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Related Experiment Video

Updated: Dec 22, 2025

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Highly Conductive Polymeric Ionic Liquid Electrolytes for Ambient-Temperature Solid-State Lithium Batteries.

Fengrui Zhang1,2, Yiyang Sun2, Zhicheng Wang1,2

  • 1School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei 230026, China.

ACS Applied Materials & Interfaces
|May 1, 2020
PubMed
Summary
This summary is machine-generated.

Researchers developed a new solid polymer electrolyte for solid-state lithium metal batteries. This improved electrolyte offers higher ionic conductivity and better battery performance, paving the way for next-generation energy storage.

Keywords:
Li metal batteryhigh ionic conductivityin situ plasticizationpolymeric ionic liquidsolid polymer electrolyte

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Polymer Chemistry

Background:

  • Solid-state lithium metal batteries are crucial for next-generation energy storage due to their high energy density.
  • Polymeric ionic liquid-based solid polymer electrolytes (PIL-based SPEs) show promise but suffer from low ionic conductivity caused by polymer crystallization.
  • Low ionic conductivity in PIL-based SPEs limits their application in high-performance solid-state batteries.

Purpose of the Study:

  • To enhance the ionic conductivity of PIL-based SPEs by reducing crystallinity.
  • To develop a novel PIL-based SPE with improved properties for solid-state lithium metal batteries.
  • To investigate the performance of a solid-state battery utilizing the newly developed SPE.

Main Methods:

  • Facile copolymerization of an ionic liquid monomer and poly(ethylene glycol) diacrylate monomer.
  • In situ plasticization of polymer chains to decrease crystallinity and glass-transition temperature.
  • Fabrication and electrochemical testing of a solid-state LiFePO4 (LFP)|Li battery using the developed SPE.

Main Results:

  • The resultant PIL-based SPE exhibited decreased crystallinity and a lower glass-transition temperature.
  • Achieved improved ionic conductivity of 1.4 × 10^-4 S cm^-1 at 30 °C.
  • The LFP|Li solid-state battery demonstrated a high reversible specific capacity of 140 mA h g^-1 at 0.2C and 25 °C with excellent cycling stability and ~100% Coulombic efficiency.

Conclusions:

  • The in situ plasticized PIL-based SPE significantly enhances ionic conductivity and battery performance.
  • This approach effectively reduces polymer crystallinity, leading to improved electrolyte properties.
  • The developed SPE is a promising candidate for advancing solid-state lithium metal battery technology.