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

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