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Revolutionizing Lithium Metal Anodes With 3D-Printed Topology-Optimized Hosts for Enhanced Stability.

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  • 1Institute for Frontier Materials, Deakin University, Waurn Ponds, Victoria, Australia.

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Summary

Topology optimization and 3D printing create advanced lithium metal anodes (LMAs) for high-energy batteries. This novel host structure enhances mechanical stability, enabling over 1000 hours of stable cycling under demanding conditions.

Keywords:
3D‐printingadditive manufacturinglithium metal anodetopology optimization

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Mechanical Engineering

Background:

  • Lithium metal anodes (LMAs) offer high energy density for next-generation batteries.
  • Challenges include volume expansion and lithium dendrite growth during cycling.
  • Existing host materials struggle with deep cycling stability.

Purpose of the Study:

  • To design a novel lithium metal anode host using topology optimization.
  • To improve mechanical stability and limit volume changes during battery cycling.
  • To demonstrate the fabrication and performance of the optimized anode.

Main Methods:

  • Topology optimization used for iterative structural design, linking porosity and mechanical stability.
  • Digital Light Processing (DLP) 3D printing employed for high-resolution microstructure fabrication.
  • Symmetric and full cell tests conducted to evaluate cycling stability and capacity retention.

Main Results:

  • The topology-optimized host (TP host) effectively distributes stress and limits volume expansion.
  • Stable cycling exceeding 1000 hours achieved at 20 mA cm⁻² and 20 mAh cm⁻² in symmetric cells.
  • Full cells with LiFePO₄ cathodes retained 95.2% capacity after 150 cycles at 5 C.

Conclusions:

  • Combining topology optimization and 3D printing yields ultra-stable, high-performance LMAs.
  • The developed anode design opens new pathways for advanced battery development.
  • This approach addresses key limitations hindering practical LMA application.