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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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Colloidal precipitates01:09

Colloidal precipitates

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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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Solvating Effects02:12

Solvating Effects

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An understanding of the solvating effect helps rationalize the relation between solvation and acidity of the compound. In addition, this also explains the relative stability of conjugate bases for compounds with different pKa values. This lesson details, in-depth, the principle of solvating effects. The strength of an acid and the stability of its corresponding conjugate base are determined using pKa values. This observed relationship is a consequence of solvation, which is the interaction...
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Semi-Solid Superprotonic Supramolecular Polymer Electrolytes Based on Deep Eutectic Solvents and Polyoxometalates.

Haikun Guo1, Leibo Li2, Xiaolei Xu1

  • 1State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Qianjin Avenue 2699, Changchun, 130012, China.

Angewandte Chemie (International Ed. in English)
|September 15, 2022
PubMed
Summary

Researchers created new bulk supramolecular polymers (SPs) using polyoxometalate (POM) nanoclusters and deep eutectic solvents (DES). These solid-state SPs function as strong, conductive electrolytes for energy devices.

Keywords:
Deep Eutectic SolventHybrid ElectrolytePolyoxometalateProton ConductionSupramolecular Polymer

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Area of Science:

  • Materials Science
  • Supramolecular Chemistry
  • Electrochemistry

Background:

  • Supramolecular polymers (SPs) offer dynamic bonding for functional soft materials.
  • Existing SPs are typically limited to solution states, hindering bulk material applications.
  • Development of solid-state SPs is crucial for advanced material functionalities.

Purpose of the Study:

  • To fabricate semi-solid bulk supramolecular polymer materials.
  • To investigate the potential of these materials as superprotonic conductive electrolytes.
  • To explore their application in energy storage devices like supercapacitors.

Main Methods:

  • Utilized polyoxometalate (POM) nanoclusters as supramolecular cross-linkers.
  • Solidified a deep eutectic solvent (DES) to form bulk SP materials.
  • Characterized proton conductivity, mechanical strength, and electrode-electrolyte interface formation.

Main Results:

  • Achieved superprotonic conductivity exceeding 1×10-4 S cm-1.
  • Demonstrated mechanical strength greater than 1 MPa at room temperature.
  • Enabled stable electrode-electrolyte interface formation via melt-infiltration for enhanced supercapacitor performance.

Conclusions:

  • Successfully developed novel semi-solid bulk SP materials from a DES/POM hybrid system.
  • These materials exhibit excellent proton conductivity and mechanical robustness.
  • The system presents a promising platform for functional supramolecular materials in energy and electronic applications.