Lithium-oxygen electrochemistry in non-aqueous solutions

Daniel Sharon, Daniel Hirshberg, Michal Afri, Arnd Garsuch, Aryeh A. Frimer, Doron Aurbach*

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

41 Scopus citations

Abstract

Pairing lithium and oxygen in aprotic solvents can theoretically lead to one of the most promising electrochemical cells available. If successful, this system could compete with technologies such as the internal combustion engine and provide an energy density that can accommodate electric vehicle demands. However, there are many problems that have inhibited this technology from becoming realistic. One of the main reasons is capacity fading after only a few cycles, which is caused by the instability of electrolyte solutions in the presence of reduced oxygen species like O2.- and O22-. In recent years, using various analytical tools, researchers have been able to isolate the breakdown products arising from the reactions occurring between the aprotic solvent and the reduced oxygen species. Nevertheless, no solvents have yet been found that are fully stable throughout the reduction and oxidation processes. However, an understanding of these decomposition mechanisms can help us in designing new systems that are more stable toward the aggressive conditions taking place in Li-O2 cell operation. This review will include analytical studies on the most widely used solvents in current Li-O2 research.

Original languageAmerican English
Pages (from-to)508-520
Number of pages13
JournalIsrael Journal of Chemistry
Volume55
Issue number5
DOIs
StatePublished - 1 May 2015
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords

  • electrochemistry
  • lithium-oxygen batteries
  • oxygen reduction
  • radicals
  • redox chemistry

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