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Related Experiment Video

Updated: Jul 24, 2025

Indirect Fabrication of Lattice Metals with Thin Sections Using Centrifugal Casting
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Combining Solid Solution Strengthening and Second Phase Strengthening for Thinning Li Metal Foils.

Zixing Guo1, Tengrui Wang1, Donghai Wang1

  • 1Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China.

ACS Nano
|July 10, 2023
PubMed
Summary

Researchers developed a novel method to create ultrathin, robust lithium metal foils for high-energy batteries. This breakthrough enhances lithium battery performance and cycle life.

Keywords:
Li metal anodehigh energy densitysecond phase strengtheningsolid solution strengtheningultrathin foil

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Battery Technology

Background:

  • Thin lithium (Li) metal foils are crucial for high-energy-density lithium batteries but are difficult to manufacture due to poor mechanical properties.
  • Achieving thin foils (<50 μm) is a significant challenge in battery development.

Purpose of the Study:

  • To enhance the mechanical strength and ductility of metallic lithium for improved processability.
  • To fabricate ultrathin, freestanding, and mechanically robust lithium metal foils for advanced battery applications.

Main Methods:

  • Incorporating silver fluoride (AgF) into lithium metal to induce solid solution and second phase strengthening.
  • Fabricating ultrathin (down to 5 μm) Li-AgF composite foils with enhanced machinability.
  • Investigating the electrochemical performance of Li-AgF electrodes in a carbonate electrolyte.

Main Results:

  • The Li-AgF composite foil exhibited significantly improved strength and ductility.
  • An ultrathin (5 μm), freestanding, and mechanically robust Li-AgF foil was successfully fabricated.
  • The in situ-formed Li-Ag-LiF skeleton facilitated Li diffusion and uniform deposition.
  • The Li-AgF electrode demonstrated a cycle life exceeding 500 hours at 1 mA cm⁻² and 1 mAh cm⁻².
  • A LiCoO₂||Li-AgF cell showed ~90% capacity retention over 100 cycles at 0.5 C.

Conclusions:

  • The addition of AgF effectively enhances the mechanical properties of lithium metal, enabling the production of ultrathin foils.
  • The developed Li-AgF composite foil offers improved Li diffusion kinetics and uniform deposition, leading to enhanced battery performance and longevity.
  • This advancement holds significant potential for the development of next-generation high-energy-density lithium batteries.