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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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Related Experiment Video

Updated: Jul 29, 2025

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Engineering Multi-field-coupled Synergistic Ion Transport System Based on the Heterogeneous Nanofluidic Membrane for

Lin Fu1,2, Yuhao Hu1,2, Xiangbin Lin1,2

  • 1CAS Key Laboratory of Bio-Inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, People's Republic of China.

Nano-Micro Letters
|May 20, 2023
PubMed
Summary

This study introduces a novel multi-field-coupled system for efficient lithium (Li) extraction from spent lithium-ion batteries. The innovative nanofluidic membrane technology significantly enhances Li-ion transport and selectivity.

Keywords:
Ion separationLithium extractionNanofluidsSpent lithium-ion batterySynergistic effect

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Electrochemistry

Background:

  • Growing demand for lithium (Li) driven by rechargeable lithium-ion batteries (LIBs) necessitates sustainable extraction methods.
  • Extracting Li from spent LIBs is a strategic approach, with membrane separation offering low energy consumption and eco-friendliness.
  • Existing membrane systems lack optimization in coordinating inherent structure with external fields, limiting ion transport efficiency.

Purpose of the Study:

  • To develop a multi-field-coupled synergistic ion transport system (MSITS) for enhanced Li-ion extraction from spent LIBs.
  • To investigate the synergistic effects of coupling light-induced heat, electrical, and concentration gradient fields on ion transport.
  • To overcome limitations of monotonous membrane designs in current separation technologies.

Main Methods:

  • Fabrication of a heterogeneous nanofluidic membrane as a platform for multi-external field coupling.
  • Construction of a multi-field-coupled synergistic ion transport system (MSITS) integrating light-induced heat, electrical, and concentration gradient fields.
  • Experimental evaluation of Li-ion flux and selectivity (Li+/Co2+) using the developed MSITS.

Main Results:

  • The MSITS achieved a Li flux of 367.4 mmol m⁻² h⁻¹, demonstrating synergistic enhancement beyond individual fields.
  • Ultrahigh selectivity for Li+ over Co2+ was observed, with a Li+/Co2+ factor of 216,412.
  • The system effectively accelerated transmembrane ion transport and mitigated ion concentration polarization.

Conclusions:

  • The proposed MSITS based on nanofluidic membranes offers a highly efficient and selective strategy for Li-ion extraction from spent LIBs.
  • Coupling multiple external fields with optimized membrane structure provides synergistic enhancement for ion transport.
  • This work presents a promising platform for advancing membrane-based applications in resource recovery and separation processes.