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      Reversible epitaxial electrodeposition of metals in battery anodes.

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          Abstract

          The propensity of metals to form irregular and nonplanar electrodeposits at liquid-solid interfaces has emerged as a fundamental barrier to high-energy, rechargeable batteries that use metal anodes. We report an epitaxial mechanism to regulate nucleation, growth, and reversibility of metal anodes. The crystallographic, surface texturing, and electrochemical criteria for reversible epitaxial electrodeposition of metals are defined and their effectiveness demonstrated by using zinc (Zn), a safe, low-cost, and energy-dense battery anode material. Graphene, with a low lattice mismatch for Zn, is shown to be effective in driving deposition of Zn with a locked crystallographic orientation relation. The resultant epitaxial Zn anodes achieve exceptional reversibility over thousands of cycles at moderate and high rates. Reversible electrochemical epitaxy of metals provides a general pathway toward energy-dense batteries with high reversibility.

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          Author and article information

          Journal
          Science
          Science (New York, N.Y.)
          American Association for the Advancement of Science (AAAS)
          1095-9203
          0036-8075
          November 01 2019
          : 366
          : 6465
          Affiliations
          [1 ] Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, USA.
          [2 ] Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14853, USA.
          [3 ] Department of Chemistry, Stony Brook University, Stony Brook, NY 11794, USA.
          [4 ] Energy Sciences Directorate, Brookhaven National Laboratory, Interdisciplinary Sciences Building, Building 734, Upton, NY 11973, USA.
          [5 ] Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA.
          [6 ] Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14853, USA.
          [7 ] Department of Materials Science and Chemical Engineering, Stony Brook, NY 11794, USA.
          [8 ] Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, USA. laa25@cornell.edu.
          Article
          366/6465/645
          10.1126/science.aax6873
          31672899
          e6e09ac7-4d98-4594-a673-b0fc7d255466
          History

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