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One-Step Stacking Armor Current Collectors for Dendrite-Free Lithium Metal Batteries.

Wenyang Zhao1, Zhichao Ma1,2, Zixin Guo1

  • 1School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130025, China.

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|April 9, 2026
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Summary
This summary is machine-generated.

Researchers developed a novel 3D copper composite current collector for lithium metal batteries. This design suppresses dendrite growth and volume expansion, enabling stable cycling and high capacity retention for practical applications.

Keywords:
Current collectorLaser processingLithium depositionLithium metal batteriesLong-term cycling stability

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Battery Technology

Background:

  • Lithium metal anodes offer high energy density but suffer from capacity fading and dendrite formation.
  • Developing stable lithium metal batteries is crucial for next-generation energy storage.

Purpose of the Study:

  • To engineer a novel 3D hybrid copper composite (HCC) current collector for lithium metal anodes.
  • To investigate the effect of the HCC structure on lithium deposition behavior and battery performance.

Main Methods:

  • Fabrication of a 3D HCC current collector using laser processing of ultrathin copper foil and one-step stacking with copper foam.
  • Electrochemical testing of HCC-based half and full cells (with LiFePO4 cathode).
  • Analysis of lithium plating/stripping stability and capacity retention.

Main Results:

  • The HCC current collector features through-holes acting as guided channels for uniform lithium deposition.
  • Stable lithium plating/stripping for 580 cycles with over 98.2% Coulombic efficiency achieved in half cells.
  • Full cells maintained 82% capacity retention after 280 cycles at 2 C.

Conclusions:

  • The developed HCC current collector effectively suppresses dendrite growth and volume expansion in lithium metal anodes.
  • This innovative design offers a promising pathway for realizing high-energy-density and stable lithium metal batteries.
  • The synergistic effect of the 3D structure enhances lithium deposition regulation and overall battery performance.