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3D Porous Cu-Composites for Stable Li-Metal Battery Anodes.

Sul Ki Park1, Davor Copic1,2, Tommy Zijian Zhao1

  • 1Department of Engineering, University of Cambridge, Cambridge CB3 0FS, United Kingdom.

ACS Nano
|July 25, 2023
PubMed
Summary
This summary is machine-generated.

A new, scalable electrodeposition method creates robust 3D copper anodes for lithium-ion batteries. This technique improves lithium plating reliability and cycling stability, addressing key challenges in battery performance and safety.

Keywords:
3D porous electrodesCu foamcarbon nanotubeslithium metal anodelithium-ion batteries

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Lithium (Li) metal anodes offer high capacity for lithium-ion batteries (LIBs) but suffer from dendrite growth and volume changes during plating/stripping.
  • Existing methods for creating porous scaffolds for Li metal anodes often involve expensive or difficult-to-scale techniques.
  • Addressing these limitations is crucial for advancing the safety and longevity of next-generation batteries.

Purpose of the Study:

  • To develop a scalable and cost-effective fabrication method for robust 3D copper (Cu) anodes for Li metal batteries.
  • To investigate the influence of electrodeposition parameters and mechanical calendering on anode performance.
  • To achieve high Coulombic efficiencies and cycling stability for Li metal anodes.

Main Methods:

  • A one-step electrodeposition process was employed to fabricate 3D Cu anodes.
  • Electrodeposition parameters (areal loading, pore structure, thickness) were tuned.
  • Mechanical calendering was used to optimize electrode volume, capacity, and cycling stability.

Main Results:

  • The scalable fabrication method produced robust 3D Cu anodes with tunable properties.
  • Optimized electrodes demonstrated high Coulombic efficiencies (CEs) of 99% over 800 cycles in half cells.
  • Achieved performance represents a significant advancement for Li metal anode hosts using LiTFSI electrolyte.

Conclusions:

  • The developed one-step electrodeposition offers a scalable route to high-performance 3D Cu anodes.
  • This method effectively mitigates issues associated with Li metal plating and cycling.
  • The findings pave the way for safer and more durable lithium metal batteries.