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Fabrication of VB2/Air Cells for Electrochemical Testing

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Electrochemically Induced Reconfiguring Decayed Vanadium Oxides for Recycling.

Yancheng Chen^1,2, Jianxin Ou¹, Shanyong Guo³

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

ACS Applied Materials & Interfaces

|April 11, 2025

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:

V2O5 crystal repair in situ phase transformation lithium-ion batteries zinc-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.