An Ether-Based Low Density Electrolyte for the Use of Graphite Anodes in Stable Lithium-Sulfur Batteries

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Florian S. Hoffmann - , Chair of Inorganic Chemistry I, Fraunhofer Institute for Material and Beam Technology (Author)
  • Florian Schmidt - , Chair of Inorganic Chemistry I, Fraunhofer Institute for Material and Beam Technology (Author)
  • Jannes Müller - , Technical University of Braunschweig (Author)
  • Kay Schönherr - , Fraunhofer Institute for Material and Beam Technology (Author)
  • Susanne Dörfler - , Chair of Inorganic Chemistry I, Fraunhofer Institute for Material and Beam Technology (Author)
  • Thomas Abendroth - , Fraunhofer Institute for Material and Beam Technology (Author)
  • Holger Althues - , Fraunhofer Institute for Material and Beam Technology (Author)
  • Arno Kwade - , Technical University of Braunschweig (Author)
  • Nae Lih Wu - , National Taiwan University (Author)
  • Stefan Kaskel - , Chair of Inorganic Chemistry I, Fraunhofer Institute for Material and Beam Technology (Author)

Abstract

Lithium sulfur (Li−S) batteries represent an interesting technology due to the high theoretical capacity of sulfur and the low cost of the cathode material. Li−S cells with graphite electrodes could be an option for low-cost stationary energy storage as graphite is cheap and the electrode production process is well established. Unfortunately, in most Li−S electrolytes, graphite is not stable due to solvent co-intercalation and degrades fast. In this work, a new low density electrolyte based on hexyl methyl ether (HME) and 1,3-dioxalane (DOL) is presented, which allows to use graphite as anode material for Li−S batteries. In symmetric graphite vs. graphite cells an averaged Coulombic efficiency of 99.94 % per electrode could be reached. For the first time, cycling conditions like voltage window and balancing were optimized for Li−S cells with graphite anodes and the suitability of the concept could be demonstrated in multilayer pouch cells under realistic conditions.

Details

Original languageEnglish
Article numbere202300093
Number of pages11
JournalBatteries and Supercaps
Volume6
Issue number6
Publication statusPublished - Jun 2023
Peer-reviewedYes

External IDs

WOS 000985047600001

Keywords

Keywords

  • 3-electrode measurement, capacity balancing, energy conversions, intercalations, pouch cell characterization, Capacity balancing, Energy conversions, Intercalations, Pouch cell characterization