Nucleation and Growth of Lithium Peroxide in the Li-O-2 Battery

Sampson Lau, Lynden A. Archer

Research output: Contribution to journalArticlepeer-review

116 Scopus citations

Abstract

We study the relationship between Li2O2 morphology and the electrochemical performance of the Li-O2 battery using a combination of experiment and theory. Experimental Li-O2 battery discharge curves are accurately captured by a theoretical model in which electrode performance is limited by the nucleation and growth of discrete Li2O2 nanostructures in the cathode. We further show that the characteristic sharp voltage drop widely reported at the end of discharge results from the decrease in electrochemical surface area as Li2O2 covers the cathode surface. Preventing surface nucleation is highlighted as a core strategy for increasing Li-O2 battery capacity.
Original languageEnglish (US)
Pages (from-to)5995-6002
Number of pages8
JournalNano Letters
Volume15
Issue number9
DOIs
StatePublished - 2015
Externally publishedYes

ASJC Scopus subject areas

  • Bioengineering
  • Materials Science(all)
  • Chemistry(all)
  • Mechanical Engineering
  • Condensed Matter Physics

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