Modeling of lithium-oxygen batteries with the discharge product treated as a discontinuous deposit layer

C. Y. Jung, T. S. Zhao, Liang An

Research output: Journal article publicationJournal articleAcademic researchpeer-review

26 Citations (Scopus)

Abstract

In this paper, a one-dimensional mathematical model for a non-aqueous lithium-oxygen battery is developed. Unlike previous models, in which all the depositions of the discharge product, lithium peroxide (Li2O2), onto carbon surfaces are treated as continuous solid films, the present work models the formation of Li2O2as a discontinuous deposit layer. Moreover, the effect of discharge current density on the morphology of the Li2O2deposit is considered. These treatments enable a more realistic simulation of the effect of the discharge product formation on carbon surfaces. The numerical discharging results are found to be in very good agreement with the experimental data at different current densities including 0.05, 0.1 and 0.2 mA cm-2. The present model is subsequently used to investigate the effect of the design parameters of the cathode (including the electrode thickness, the effective surface area and the cathode utilization) on the discharge performance.
Original languageEnglish
Pages (from-to)440-447
Number of pages8
JournalJournal of Power Sources
Volume273
DOIs
Publication statusPublished - 1 Jan 2015
Externally publishedYes

Keywords

  • Deposit layer
  • Li-O battery 2
  • Lithium peroxide
  • Model
  • Surface coverage

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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