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Related Concept Videos

Ion Exchange01:17

Ion Exchange

565
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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Standard Electrode Potentials03:02

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On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
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Updated: Jun 14, 2025

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Multifunctional Interface Layer Constructed by Trace Zwitterions for Highly Reversible Zinc Anodes.

Xixi Zhang1, Chenggang Wang1, Jinzhao Huang1

  • 1School of Physics and Technology, University of Jinan, 336 West Road of Nan Xinzhuang, Jinan, 250022, Shandong, P. R. China.

Angewandte Chemie (International Ed. in English)
|September 1, 2024
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Summary

Trace zwitterions (trifluoroacetate pyridine, TFAPD) in aqueous electrolytes significantly improve zinc anode performance by preventing dendrite growth and parasitic reactions. This breakthrough enhances battery cycling life and stability for advanced energy storage applications.

Keywords:
Zn-iodine batterydynamic interface layerhighly reversible Zn anodetrace additive

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • Zinc anodes suffer from limited lifespan due to inhomogeneous plating and dendrite formation.
  • Parasitic reactions at the electrode/electrolyte interface further degrade zinc anode performance.

Purpose of the Study:

  • To enhance the reversibility and cycling stability of aqueous zinc anodes.
  • To develop a multifunctional interface for improved zinc deposition and reduced side reactions.

Main Methods:

  • Introduction of trace zwitterions (trifluoroacetate pyridine, TFAPD) into aqueous electrolytes.
  • Analysis of interface reconstruction using electrochemical techniques.
  • Evaluation of zinc anode performance in Zn||Zn and Zn||I2 cells.

Main Results:

  • TFAPD reconstructs the inner Helmholtz plane (IHP) and outer Helmholtz plane (OHP) of the zinc anode.
  • Suppression of hydrogen evolution and corrosion side reactions.
  • Uniform Zn2+ deposition and accelerated desolvation kinetics.
  • Zn||Zn cells exceeded 10,000 hours of cycling.
  • Zn||I2 cells demonstrated over 95% capacity retention after 30,000 cycles.
  • Zn||I2 pouch cells maintained 99% capacity after 750 cycles.

Conclusions:

  • Zwitterion-modified interfaces offer a promising strategy for stable and long-lasting aqueous zinc batteries.
  • The multifunctional interface effectively addresses key challenges in zinc anode performance.
  • This approach paves the way for high-performance and reliable zinc-based energy storage systems.