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Effect of the size-selective silver clusters on lithium peroxide morphology in lithium–oxygen batteries

Author

Listed:
  • Jun Lu

    (Argonne National Laboratory)

  • Lei Cheng

    (Argonne National Laboratory)

  • Kah Chun Lau

    (Argonne National Laboratory)

  • Eric Tyo

    (Argonne National Laboratory)

  • Xiangyi Luo

    (Argonne National Laboratory)

  • Jianguo Wen

    (Electron Microscopy Center, Argonne National Laboratory)

  • Dean Miller

    (Electron Microscopy Center, Argonne National Laboratory)

  • Rajeev S. Assary

    (Argonne National Laboratory)

  • Hsien-Hau Wang

    (Argonne National Laboratory)

  • Paul Redfern

    (Argonne National Laboratory)

  • Huiming Wu

    (Argonne National Laboratory)

  • Jin-Bum Park

    (Hanyang University)

  • Yang-Kook Sun

    (Hanyang University)

  • Stefan Vajda

    (Argonne National Laboratory
    Argonne National Laboratory
    School of Engineering, Yale University
    Institute for Molecular Engineering, The University of Chicago)

  • Khalil Amine

    (Argonne National Laboratory)

  • Larry A. Curtiss

    (Argonne National Laboratory
    Argonne National Laboratory)

Abstract

Lithium–oxygen batteries have the potential needed for long-range electric vehicles, but the charge and discharge chemistries are complex and not well understood. The active sites on cathode surfaces and their role in electrochemical reactions in aprotic lithium–oxygen cells are difficult to ascertain because the exact nature of the sites is unknown. Here we report the deposition of subnanometre silver clusters of exact size and number of atoms on passivated carbon to study the discharge process in lithium–oxygen cells. The results reveal dramatically different morphologies of the electrochemically grown lithium peroxide dependent on the size of the clusters. This dependence is found to be due to the influence of the cluster size on the formation mechanism, which also affects the charge process. The results of this study suggest that precise control of subnanometre surface structure on cathodes can be used as a means to improve the performance of lithium–oxygen cells.

Suggested Citation

  • Jun Lu & Lei Cheng & Kah Chun Lau & Eric Tyo & Xiangyi Luo & Jianguo Wen & Dean Miller & Rajeev S. Assary & Hsien-Hau Wang & Paul Redfern & Huiming Wu & Jin-Bum Park & Yang-Kook Sun & Stefan Vajda & K, 2014. "Effect of the size-selective silver clusters on lithium peroxide morphology in lithium–oxygen batteries," Nature Communications, Nature, vol. 5(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms5895
    DOI: 10.1038/ncomms5895
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