Ferrocene-Promoted Long-Cycle Lithium–Sulfur Batteries

Yingying Mi, Wen Liu, Ke R. Yang, Jianbing Jiang, Qi Fan, Zhe Weng, Yiren Zhong, Zishan Wu, Gary W Brudvig, Victor S. Batista, Henghui Zhou, Hailiang Wang

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Confining lithium polysulfide intermediates is one of the most effective ways to alleviate the capacity fade of sulfur-cathode materials in lithium–sulfur (Li–S) batteries. To develop long-cycle Li–S batteries, there is an urgent need for material structures with effective polysulfide binding capability and well-defined surface sites; thereby improving cycling stability and allowing study of molecular-level interactions. This challenge was addressed by introducing an organometallic molecular compound, ferrocene, as a new polysulfide-confining agent. With ferrocene molecules covalently anchored on graphene oxide, sulfur electrode materials with capacity decay as low as 0.014 % per cycle were realized, among the best of cycling stabilities reported to date. With combined spectroscopic studies and theoretical calculations, it was determined that effective polysulfide binding originates from favorable cation–π interactions between Li+ of lithium polysulfides and the negatively charged cyclopentadienyl ligands of ferrocene.

Original languageEnglish
Pages (from-to)14818-14822
Number of pages5
JournalAngewandte Chemie - International Edition
Volume55
Issue number47
DOIs
Publication statusPublished - Nov 14 2016

Keywords

  • ferrocene
  • graphene oxide
  • lithium polysulfides
  • lithium–sulfur batteries
  • long-cycle batteries

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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    Mi, Y., Liu, W., Yang, K. R., Jiang, J., Fan, Q., Weng, Z., Zhong, Y., Wu, Z., Brudvig, G. W., Batista, V. S., Zhou, H., & Wang, H. (2016). Ferrocene-Promoted Long-Cycle Lithium–Sulfur Batteries. Angewandte Chemie - International Edition, 55(47), 14818-14822. https://doi.org/10.1002/anie.201609147