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Electrochemically Induced Reconfiguring Decayed Vanadium Oxides for Recycling.

Yancheng Chen1,2, Jianxin Ou1, Shanyong Guo3

  • 1College of Materials Science and Engineering, Huaqiao University, Xiamen, Fujian Province 361021, China.

ACS Applied Materials & Interfaces
|April 11, 2025
PubMed
Summary
This summary is machine-generated.

This study introduces a novel electrochemical method to repair degraded vanadium pentoxide (V2O5) in lithium-ion batteries. The technique enhances zinc-ion battery performance and longevity by regenerating electrode materials.

Keywords:
V2O5crystal repairin situ phase transformationlithium-ion batterieszinc-ion batteries

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Crystal repair strategies are used to extend electrode material lifespan but have limitations.
  • Defects introduced during repair can hinder battery performance.
  • Deteriorated electrode materials in lithium-ion batteries often require regeneration.

Purpose of the Study:

  • To propose an electrochemically induced phase transformation method for regenerating electrode materials.
  • To complement traditional crystal repair strategies for improved battery cycling life.
  • To enhance zinc-ion storage capabilities in aqueous zinc-ion batteries.

Main Methods:

  • Utilizing electrochemically induced phase transformation to repair decayed α-phase V2O5.
  • Controlling stimulated current and utilizing interlayer H2O to tune phase transformation kinetics.
  • Regenerating V2O5 from deteriorated lithium-ion batteries.

Main Results:

  • The regenerated V2O5 forms stable bilayer structure crystals.
  • Achieved a remarkable Zn2+ areal capacity of 6.5 mA h cm-2 in aqueous zinc-ion batteries.
  • Demonstrated cycling stability over 1500 cycles, outperforming fresh V2O5.

Conclusions:

  • Electrochemical phase transformation is an effective method for repairing and regenerating electrode materials.
  • The technique offers a promising approach for enhancing the performance and lifespan of zinc-ion batteries.
  • This method provides a viable alternative to traditional repair strategies, improving defect repair and crystal structure.