Insights into the redistribution of sulfur species during cycling in lithium-sulfur batteries using physisorption methods

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Patrick Strubel - , Fraunhofer Institute for Material and Beam Technology (Author)
  • Sören Thieme - , Fraunhofer Institute for Material and Beam Technology (Author)
  • Christine Weller - , 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)

Abstract

Nitrogen physisorption was used to analyze textural transformations in lithium-sulfur cathodes during cycling for two alternate electrolyte systems. Significant impact of the electrolyte type on the accessible cathode porosity in the charged vs. discharged state was detected, providing important insights in the cells conversion mechanism and the role of polysulfide solubility. The main advantage of the method lies in the resolution of pore accessibility and size distributions. Thus, depending on the state of charge (SoC), the C-rate used for cycling as well as electrolyte properties (i.e. polysulfide solvation), significant differences in the redistribution of active sulfur species as well as pore blocking effects can be identified. This methodology might facilitate interpretation and further optimization to achieve long-term stable lithium-sulfur batteries.

Details

Original languageEnglish
Pages (from-to)437-441
Number of pages5
JournalNano energy
Volume34
Publication statusPublished - 9 Mar 2017
Peer-reviewedYes

Keywords

Sustainable Development Goals

Keywords

  • Carbon, Energy storage, Lithium-sulfur mechanism, Lithium-sulfur-battery, Nitrogen physisorption

Library keywords