Understanding the Reaction Mechanism of Lithium-Sulfur Batteries by In situ/Operando XAS

In situ/operando XAS investigation of the electrochemical reaction mechanism of a Li2S electrode for lithium sulfur batteries. The results highlight the importance of intermediate polysulfides for the reaction path of the Li2S electrode.

Scientific Achievement

We presented the recent progress in the application of in situ/operando XAS in the understanding of the redox mechanism of lithium sulfur batteries, which is of great significance for the development of high-performance lithium sulfur batteries.

Significance and Impact

The new insights from the in situ/operando XAS results have offered a real-time characterization capabilities for monitoring the electronic structure evolution of both cathode and anode materials for lithium sulfur batteries.

Research Details

  • The reaction mechanism of sulfur and Li2S electrodes investigated by in situ/operando XAS is presented.
  • The confinement of intermediate polysulfides by functional polymer binders is summarized.
  • The synergetic effect of electrolyte additive and polysulfides on the formation process of SEI layer is presented.

DOI: 10.1007/s13369-019-03808-8

Download this highlight 

Latest Updates

See All
  • JCESR Spotlight: Bob Jin Kwon, A Postdoc with Passion and Perseverance

    Argonne recognizes Kwon’s contributions to battery science with the Postdoctoral Performance Award. Article authored by: Michael Matz, Argonne Associate Bob Jin Kwon likes a good challenge, particularly when it comes to developing completely new kinds of batteries. “Developing new battery technologies is very challenging,” said … Read More

  • JCESR Spotlight: Lily Robertson Recognized for Her Contributions to Battery Research

    Argonne’s Postdoctoral Performance Award recognizes scientific achievements, leadership, and collaboration. Article authored by: Michael Matz, Argonne Associate Since her early days growing up in the Pacific Northwest, Lily Robertson has always wanted to help make the world a better place. “For as … Read More

  • Understanding fluorine-free electrolytes via small-angle X-ray scattering

    We compare the solvation phenomenon of sodium tetraphenylborate (NaBPh4) salt dissolved in organic solvents of propylene carbonate (PC), 1,2-dimethoxyethane (DME), acetonitrile (ACN) and tetrahydrofuran (THF) by SAXS/WAXS measurement and MD simulation. Read More

  • Navigating the Minefield of Battery Literature

    This is an invited perspective aiming to help researchers new to the field of battery research to circumvent certain recurring misconceptions and inaccuracies in the current battery literature. It covers the electrolyte ideality and practical situation in batteries, the difficulty in accurately determining ion transference … Read More

  • Quantifying Lithium Ion Exchange in Solid Electrolyte Interphase (SEI) on Graphite Anode Surfaces

    By using Li isotopic labelling of SEIs and electrolytes followed by time-of-flight secondary-ion mass spectroscopy and solid-state NMR analyses, we found that the majority of Li+ “immobilized” in the chemical ingredients were exchanged after 1 SEI formation cycle. Ion exchange by diffusion based on concentration … Read More