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

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 (), Khalil Amine () and Larry A. Curtiss ()
Additional contact information
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
Khalil Amine: Argonne National Laboratory
Larry A. Curtiss: Argonne National Laboratory

Nature Communications, 2014, vol. 5, issue 1, 1-8

Abstract: 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.

Date: 2014
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DOI: 10.1038/ncomms5895

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