Oxygen reactions in a non-aqueous Li+ electrolyte

Zhangquan Peng, Stefan A. Freunberger, Laurence J. Hardwick, Yuhui Chen, Vincent Giordani, Fanny Bardé, Petr Novák, Duncan Graham, Jean Marie Tarascon, Peter G. Bruce

Research output: Contribution to journalArticlepeer-review

554 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)6351-6355
Number of pages5
JournalAngewandte Chemie - International Edition
Volume50
Issue number28
DOIs
StatePublished - 4 Jul 2011
Externally publishedYes

Keywords

  • electrochemistry
  • lithium batteries
  • oxygen
  • reduction
  • surface enhanced Raman spectroscopy

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