Get access

Oxygen Reactions in a Non-Aqueous Li+ Electrolyte

Authors

  • Dr. Zhangquan Peng,

    1. School of Chemistry, University of St Andrews, The Purdie Building, North Haugh, St Andrews KY16 9ST (UK), Fax: (+44) 1334-463-808
    Search for more papers by this author
  • Dr. Stefan A. Freunberger,

    1. School of Chemistry, University of St Andrews, The Purdie Building, North Haugh, St Andrews KY16 9ST (UK), Fax: (+44) 1334-463-808
    Search for more papers by this author
  • Dr. Laurence J. Hardwick,

    1. School of Chemistry, University of St Andrews, The Purdie Building, North Haugh, St Andrews KY16 9ST (UK), Fax: (+44) 1334-463-808
    Search for more papers by this author
  • Yuhui Chen,

    1. School of Chemistry, University of St Andrews, The Purdie Building, North Haugh, St Andrews KY16 9ST (UK), Fax: (+44) 1334-463-808
    Search for more papers by this author
  • Dr. Vincent Giordani,

    1. School of Chemistry, University of St Andrews, The Purdie Building, North Haugh, St Andrews KY16 9ST (UK), Fax: (+44) 1334-463-808
    2. Laboratoire de Réactivité et Chimie des Solides, UMR 6007, Université de Picardie Jules Verne, 80039 Amiens (France)
    Search for more papers by this author
  • Dr. Fanny Bardé,

    1. Toyota Motor Europe, Technical Centre, Hoge Wei 33 B, B-1930 Zaventem (Belgium)
    Search for more papers by this author
  • Prof. Dr. Petr Novák,

    1. Electrochemistry Laboratory, Paul Scherrer Institut, CH-5232 Villigen PSI (Switzerland)
    Search for more papers by this author
  • Prof. Duncan Graham,

    1. Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL (UK)
    Search for more papers by this author
  • Prof. Jean-Marie Tarascon,

    1. Laboratoire de Réactivité et Chimie des Solides, UMR 6007, Université de Picardie Jules Verne, 80039 Amiens (France)
    Search for more papers by this author
  • Prof. Peter G. Bruce

    Corresponding author
    1. School of Chemistry, University of St Andrews, The Purdie Building, North Haugh, St Andrews KY16 9ST (UK), Fax: (+44) 1334-463-808
    • School of Chemistry, University of St Andrews, The Purdie Building, North Haugh, St Andrews KY16 9ST (UK), Fax: (+44) 1334-463-808
    Search for more papers by this author

  • P.G.B. is indebted to the EPSRC, EU, and Toyota Motor Europe for financial support.

Abstract

original image

Taking the shortcut: Spectroscopic data (see picture) provide direct evidence that in non-aqueous Li+ electrolyte, O2 is reduced to O2, which then forms LiO2 on the electrode surface which disproportionates to Li2O2. On charging, Li2O2 decomposes directly, in a one-step reaction to evolve O2 and does not pass through LiO2 as an intermediate.

Ancillary