Reducing Overpotential of Solid-State Sulfide Conversion in Potassium-Sulfur Batteries

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Chao Ye
  • Huan Li
  • Chun-Chuan Kao
  • Qinfen Gu
  • Shi-Zhang Qiao

Detail(s)

Original languageEnglish
Article numbere202301681
Journal / PublicationAngewandte Chemie - International Edition
Volume62
Issue number22
Online published28 Mar 2023
Publication statusPublished - 22 May 2023
Externally publishedYes

Link(s)

Abstract

Improving kinetics of solid-state sulfide conversion in sulfur cathodes can enhance sulfur utilization of metal-sulfur batteries. However, fundamental understanding of the solid-state conversion remains to be achieved. Here, taking potassium-sulfur batteries as a model system, we for the first time report the reducing overpotential of solid-state sulfide conversion via the meta-stable S32− intermediates on transition metal single-atom sulfur hosts. The catalytic sulfur host containing Cu single atoms demonstrates high capacities of 1595 and 1226 mAh g−1 at current densities of 335 and 1675 mA g−1, respectively, with stable Coulombic efficiency of ≈100 %. Combined spectroscopic characterizations and theoretical computations reveal that the relatively weak Cu-S bonding results in low overpotential of solid-state sulfide conversion and high sulfur utilization. The elucidation of solid-state sulfide conversion mechanism can direct the exploration of highly efficient metal-sulfur batteries. © 2023 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH.

Research Area(s)

  • Meta-Stable Intermediates, Metal-Sulfur Batteries, Single Atom Catalyst, Solid-State Conversion, Sulfur Host

Citation Format(s)

Reducing Overpotential of Solid-State Sulfide Conversion in Potassium-Sulfur Batteries. / Ye, Chao; Shan, Jieqiong; Li, Huan et al.
In: Angewandte Chemie - International Edition, Vol. 62, No. 22, e202301681, 22.05.2023.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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