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Artificial Protrusion Architectures Enabling Horizontal-Diffusion Nucleation for Stable Zinc-Based Batteries.

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A novel artificial protrusion strategy (APS) prevents dendrite growth in zinc batteries (ZBs) by guiding uniform zinc deposition. This enhances battery safety and lifespan, enabling high-performance energy storage solutions.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Rechargeable batteries with metal anodes offer high energy density but face challenges with dendrite formation, impacting safety and stability.
  • Existing methods to suppress dendrite growth in zinc-based batteries (ZBs) often limit performance.

Purpose of the Study:

  • To introduce a new artificial protrusion strategy (APS) for inhibiting dendrite formation in zinc anodes.
  • To improve the safety and cycle life of rechargeable zinc batteries.

Main Methods:

  • Mechanically incorporating zinc powder particles onto zincophilic metal surfaces to create artificial protrusions.
  • Investigating the mechanism of zinc nucleation and deposition using the APS.
  • Fabricating and testing Zn symmetrical cells and pouch cells (Zn-I2 and Zn-MnO2).

Main Results:

  • The APS promotes a horizontal-diffusion mechanism for uniform zinc nucleation and deposition, preventing dendrite formation.
  • Zinc symmetrical cells exhibited an extended lifespan of nearly 5000 hours.
  • Zn-I2 and Zn-MnO2 pouch cells achieved significant capacities of 480 mAh (3000 h) and 1.8 Ah, respectively.

Conclusions:

  • The artificial protrusion strategy effectively suppresses dendrite growth in zinc anodes.
  • This anode structural design significantly enhances the stability and longevity of zinc-based batteries.
  • The findings pave the way for developing safer and more sustainable rechargeable battery technologies.