Expansion-tolerant architectures for stable cycling of ultrahigh-loading sulfur cathodes in lithium-sulfur batteries

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Mahdokht Shaibani - , Monash University (Author)
  • Meysam Sharifzadeh Mirshekarloo - , Monash University (Author)
  • Ruhani Singh - , Commonwealth Scientific & Industrial Research Organisation (CSIRO) (Author)
  • Christopher D. Easton - , Commonwealth Scientific & Industrial Research Organisation (CSIRO) (Author)
  • M. C. Dilusha Cooray - , Monash University (Author)
  • Nicolas Eshraghi - , University of Liege (Author)
  • Thomas Abendroth - , Fraunhofer Institute for Material and Beam Technology (Author)
  • Susanne Dörfler - , Fraunhofer Institute for Material and Beam Technology (Author)
  • Holger Althues - , Fraunhofer Institute for Material and Beam Technology (Author)
  • Stefan Kaskel - , Chair of Inorganic Chemistry I, Fraunhofer Institute for Material and Beam Technology (Author)
  • Anthony F. Hollenkamp - , Commonwealth Scientific & Industrial Research Organisation (CSIRO) (Author)
  • Matthew R. Hill - , Commonwealth Scientific & Industrial Research Organisation (CSIRO), Monash University (Author)
  • Mainak Majumder - , Monash University (Author)

Abstract

Lithium-sulfur batteries can displace lithium-ion by delivering higher specific energy. Presently, however, the superior energy performance fades rapidly when the sulfur electrode is loaded to the required levels—5 to 10 mg cm−2—due to substantial volume change of lithiation/delithiation and the resultant stresses. Inspired by the classical approaches in particle agglomeration theories, we found an approach that places minimum amounts of a high-modulus binder between neighboring particles, leaving increased space for material expansion and ion diffusion. These expansion-tolerant electrodes with loadings up to 15 mg cm−2 yield high gravimetric (>1200 mA·hour g−1) and areal (19 mA·hour cm−2) capacities. The cells are stable for more than 200 cycles, unprecedented in such thick cathodes, with Coulombic efficiency above 99%.

Details

Original languageEnglish
Article numbereaay2757
JournalScience advances
Volume6
Issue number1
Publication statusPublished - 3 Jan 2020
Peer-reviewedYes

External IDs

PubMed 31922008

Keywords

ASJC Scopus subject areas