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High-Performance Three-Dimensional Li Anode Scaffold Enabled by Homogeneous Zn Nanoclusters.

Shuixin Xia1,2, Xun Zhang1, Haojie Zhao1

  • 1School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China.

Small (Weinheim an Der Bergstrasse, Germany)
|April 24, 2020
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Summary

Researchers developed a novel 3D lithium metal anode scaffold using zinc nanoclusters. This stable anode prevents dendrite growth, enhancing safety and performance for next-generation lithium metal batteries (LMBs).

Keywords:
Coulombic efficiencyLi anode scaffoldshomogeneous Zn clustersrate capabilityzeolitic imidazolate frameworks

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Lithium metal batteries (LMBs) offer high energy density but face safety challenges due to uncontrolled lithium deposition.
  • Dendrite formation on lithium anodes leads to short circuits and capacity degradation.

Purpose of the Study:

  • To develop a stable, high-performance lithium metal anode for advanced LMBs.
  • To mitigate issues associated with lithium deposition and volumetric changes.

Main Methods:

  • Fabrication of a lithiophilic 3D lithium anode scaffold via molten lithium infusion and zinc nanocluster growth.
  • Integration of the scaffold with cathode materials like LiFePO4, LiCoO2, and sulfur.
  • Electrochemical testing of half-cells and full cells to evaluate performance.

Main Results:

  • The 3D scaffold effectively suppressed dendrite formation and accommodated lithium volume changes.
  • Demonstrated improved Coulombic efficiency, rate capability, and cycle life with reduced voltage polarization.
  • Li|LFP cells achieved ≈90.8% capacity retention over 250 cycles at 1C.
  • Li|S cells exhibited a high initial discharge capacity of 924.6 mAh g⁻¹ with retention over 300 cycles at 1C.

Conclusions:

  • The zinc-nanocluster-decorated 3D scaffold provides a cost-effective and scalable solution for stable lithium metal anodes.
  • This strategy significantly enhances the safety and electrochemical performance of lithium metal batteries.
  • Paves the way for next-generation high-performance and reliable LMBs.