Lithium–sulfur redox: challenges and opportunities

Shuangyan Lang, Xinran Feng, Jeesoo Seok, Yao Yang, Mihail R. Krumov, Andrés Molina Villarino, Michael A. Lowe, Seung Ho Yu, Héctor D. Abruña

Research output: Contribution to journalReview articlepeer-review

Abstract

Mechanistic and kinetic insights into the lithium–sulfur (Li–S) redox processes are essential to fundamentally increase the utilization of active material and further realize the practical applications of Li–S batteries. In this article, recent advances of in situ/operando characterizations of Li–S reaction processes and mechanism are presented, revealing the multistep transformations of S species. Interfacial visualization, from the whole interface to nanometer scale, provides specific evidence of sulfur distribution, polysulfide diffusion, and lithium sulfide precipitation. Moreover, the development of efficient electrocatalysts to improve the reaction kinetics are additionally presented and discussed. Although the understanding of the mechanism of the Li–S redox processes has improved in recent times, additional efforts are required for the scale-up production and practical applications of Li–S batteries.

Original languageEnglish
Article number100652
JournalCurrent Opinion in Electrochemistry
Volume25
DOIs
Publication statusPublished - 2021 Feb

Keywords

  • In situ/operando characterization
  • Interfacial electrocatalysis
  • Lithium–sulfur batteries
  • Reaction mechanism and kinetics

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry

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