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Related Concept Videos

Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at the...
Dialysis01:15

Dialysis

Dialysis is a diffusion-based purification process that separates analyte molecules from a complex matrix. This is accomplished by allowing molecules in the solution to pass through a semipermeable membrane into a liquid on the other side. The membrane is usually made of cellulose acetate or cellulose nitrate, and the second liquid must be miscible with the solution. Ions (e.g., chloride or sodium) or organic molecules (e.g., glucose) can pass through the membrane pores, which generally have...
Ion Exchange01:17

Ion Exchange

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 basic...
Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
Pore Transport and Ion-Pair Transport01:17

Pore Transport and Ion-Pair Transport

Pore transport and ion-pair formation are critical mechanisms for the absorption and distribution of drugs in the body.
Pore transport, also known as convective transport, is a process where small molecules like urea, water, and sugars rapidly cross cell membranes as though there were channels or pores in the membrane. Although direct microscopic evidence is limited  but the concept of pores or channels is widely accepted based on physiological evidence. Despite the lack of direct microscopic...

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Updated: Jun 27, 2026

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
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Advanced Anion Exchange Membranes: Structural Insights and Property Optimization.

Lin Liu1, Wenguang Du1, Ning Zhang1

  • 1Faculty of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China.

Chemistry, an Asian Journal
|February 26, 2025
PubMed
Summary
This summary is machine-generated.

Anion exchange membranes (AEMs) are vital for clean energy conversion in AEMFCs. This review covers AEM development, focusing on structure-property relationships for enhanced ionic conductivity and stability in fuel cells.

Keywords:
Alkali stabilityAnion exchange membraneDimensional stabilityIon conductivity

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Chemical Engineering

Background:

  • Anion exchange membrane fuel cells (AEMFCs) offer a promising route for clean energy conversion.
  • Anion exchange membranes (AEMs) are critical components, enabling ion transport and electrode separation.
  • AEM performance hinges on a balance between ionic conductivity and stability, influenced by membrane microstructure.

Purpose of the Study:

  • To review the evolution of anion exchange membrane (AEM) technologies for AEMFCs.
  • To analyze the relationship between AEM structural characteristics and performance metrics.
  • To provide insights into optimizing AEMs for improved ionic conductivity, dimensional stability, and alkali resistance.

Main Methods:

  • Literature review of homogeneous polymer, hybrid, and nanoporous framework membranes.
  • Analysis of structure-property correlations in AEMs.
  • Discussion of design strategies for enhancing AEM performance.

Main Results:

  • Different AEM architectures (homogeneous, hybrid, nanoporous) exhibit distinct structural features.
  • Microscopic structure significantly impacts ionic conductivity and overall membrane performance.
  • Key properties like ionic conductivity, dimensional stability, and alkali resistance can be tuned through targeted design.

Conclusions:

  • Advancements in AEM design are crucial for the progress of AEMFC technology.
  • Understanding the interplay between AEM structure and properties is essential for future innovation.
  • Further research into novel AEM materials and architectures will drive efficient clean energy solutions.