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V2O5/CdS Heterostructures for High-Rate Photo-Rechargeable Zinc-Ion Batteries.

Jiamin Liu1, Yingxinjie Wang1, Guohao Li1

  • 1College of Materials Science and Engineering, Hunan University, Changsha, P. R. China.

Small (Weinheim an Der Bergstrasse, Germany)
|January 5, 2026
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Summary
This summary is machine-generated.

Researchers developed V2O5/CdS composites for photo-rechargeable zinc-ion batteries, enabling efficient solar energy harvesting and storage. These batteries demonstrate enhanced capacity under illumination, paving the way for advanced autonomous power systems.

Keywords:
cadmium sulfideheterostructuresphoto rechargeable batteriesvanadium oxidezinc‐ion batteries

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Renewable Energy

Background:

  • Photo-rechargeable batteries offer combined solar energy harvesting and storage for autonomous power.
  • High-efficiency photoactive electrodes are crucial for practical performance in these devices.

Purpose of the Study:

  • To develop novel photoactive electrode materials for efficient photo-rechargeable zinc-ion batteries.
  • To investigate the light-to-electricity-to-chemical energy conversion mechanisms.

Main Methods:

  • Fabrication of Vanadium pentoxide (V2O5)/Cadmium sulfide (CdS) composites.
  • Electrochemical testing of the composite material in zinc-ion batteries.
  • Analysis of photogenerated charge carrier separation and performance under illumination and dark conditions.

Main Results:

  • The V2O5/CdS composite demonstrated efficient separation of photogenerated electron-hole pairs.
  • The photo-rechargeable photocell achieved a light conversion efficiency of 0.99%.
  • Under high current density (4.0 A g⁻¹), capacity increased by 24.1% (to 301 mA h g⁻¹) upon illumination compared to dark conditions.

Conclusions:

  • V2O5/CdS composites are effective photoactive materials for high-performance photo-rechargeable zinc-ion batteries.
  • The study provides insights into mechanisms for high-rate performance in illuminated battery systems.
  • This work advances the development of next-generation autonomous power sources.