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Related Concept Videos

Ion Exchange01:17

Ion Exchange

395
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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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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Updated: May 10, 2025

Thermal Scanning Conductometry TSC as a General Method for Studying and Controlling the Phase Behavior of Conductive Physical Gels
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Processable and Recyclable Covalent Organic Framework Gel Electrolytes.

Zhiwen Fan1, Juntao Tang1, Wei Zhang2

  • 1College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)
|April 25, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed processable covalent organic framework (COF) gel electrolytes by manipulating interlayer interactions. This breakthrough enables solution processing and recycling of COF materials for sustainable energy storage applications.

Keywords:
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Area of Science:

  • Materials Science
  • Electrochemistry
  • Polymer Chemistry

Background:

  • Covalent organic frameworks (COFs) show promise for energy storage due to their ordered structures.
  • Insolubility and non-melt processability hinder practical applications of COFs.
  • Developing processable COF gel electrolytes and enabling their recycling is a significant challenge.

Purpose of the Study:

  • To develop a method for processing COF-based gel electrolytes.
  • To enable solution-reconstruction and recycling of COF gel electrolytes.
  • To overcome the limitations of insolubility and non-melt processability in COFs.

Main Methods:

  • Manipulating interlayer interactions within COFs using a wedge-inspired principle.
  • Introducing oxygen atoms into the COF framework to enhance solution processability in acidic media.
  • Dispersing COF powders as colloidal nanosheets in trifluoroacetic acid (TFA) aqueous solution.
  • Modulating competitive interactions between TFA, COF, and water to control COF states (gelified vs. dispersed).

Main Results:

  • Achieved good solution-processability of COF powders in strong acid mediums.
  • Successfully reconfigured COF materials between gelified and colloidally dispersed states.
  • Demonstrated that the reconfigured COF gel electrolytes maintain mechanical properties and exhibit a long cycle life (>800 h) in batteries.
  • Realized solution processing of COF powders and enabled recycling of COF from gels for repeated use.

Conclusions:

  • This study presents a novel approach for processing COF-based gel electrolytes through solution-reconstruction.
  • The developed method overcomes the inherent insolubility and non-melt processability of COFs.
  • The findings offer new strategies for the preparation and sustainable recycling of COFs for energy storage applications.