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Related Experiment Video

Updated: Apr 12, 2026

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Next-Generation Lithium Metal Anode Engineering via Atomic Layer Deposition.

Alexander C Kozen, Chuan-Fu Lin, Alexander J Pearse

    ACS Nano
    |May 14, 2015
    PubMed
    Summary

    Protecting lithium metal anodes with atomic layer deposition (ALD) significantly enhances battery performance. A thin aluminum oxide layer shields the reactive lithium surface, improving capacity retention in lithium-sulfur batteries.

    Keywords:
    atomic layer depositionlithium metal anodelithium protectionlithium−sulfursolid electrolyte interface

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    Area of Science:

    • Materials Science
    • Electrochemistry
    • Nanotechnology

    Background:

    • Lithium metal anodes offer high energy density for next-generation batteries.
    • The high reactivity of lithium metal surfaces leads to performance degradation.
    • Chemical protection layers are a promising strategy to mitigate these issues.

    Purpose of the Study:

    • To demonstrate the atomic layer deposition (ALD) of protective layers directly onto lithium metal.
    • To evaluate the effectiveness of ALD-Al2O3 as a protective coating for lithium metal anodes.
    • To assess the performance improvement in lithium-sulfur (Li-S) battery cells.

    Main Methods:

    • Utilized a custom ultrahigh vacuum integrated deposition and characterization system.
    • Applied atomic layer deposition (ALD) to create thin aluminum oxide (Al2O3) protection layers on lithium metal.
    • Tested ALD-protected lithium anodes in Li-S battery cells against bare lithium anodes.

    Main Results:

    • Achieved precise thickness control (14 nm) of ALD Al2O3 layers on lithium metal.
    • Demonstrated effective protection of the lithium surface against atmospheric, sulfur, and electrolyte exposure.
    • Observed improved capacity retention in Li-S cells with ALD-protected anodes over 100 cycles compared to bare anodes.

    Conclusions:

    • ALD is a viable technique for applying protective coatings to lithium metal anodes.
    • ALD-Al2O3 coatings significantly enhance the stability and performance of lithium metal anodes.
    • This approach offers a promising solution for improving the longevity of high-energy-density batteries.