A multi-functional interface derived from thiol-modified mesoporous carbon in lithium-sulfur batteries

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

8 Scopus Citations
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Author(s)

  • Yun Li
  • Ian A. Murphy
  • Ying Chen
  • Francis Lin
  • Xiang Wang
  • Shanyu Wang
  • Dion Hubble
  • Sei-Hum Jang
  • Karl T. Muller
  • Chongmin Wang
  • Jihui Yang

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)13372-13381
Journal / PublicationJournal of Materials Chemistry A
Volume7
Issue number21
Online published8 May 2019
Publication statusPublished - 7 Jun 2019

Abstract

Lithium-sulfur (Li-S) batteries hold great promise as a next-generation energy-storage technology. Their practical application, however, is hindered by the rapid capacity fading associated with the dissolution of lithium polysulfides (LiPSs) into organic electrolytes. In this work, we successfully impede these losses by anchoring thiol (-SH) functional groups to the nonpolar surface of a mesoporous carbon host. This new strategy increases the surface polarity of conductive carbons and traps LiPSs inside cathodes. By utilizing various spectroscopic methods, we investigate the mechanisms of LiPS trapping, which originate from the electrostatic and covalent interactions of the thiol functional groups with Li+ from the electrolyte and with S from the LiPS chains, respectively. Here, we for the first time identify the multiple interactions that are induced by a small molecular interface upon cycling and correlate them with the electrochemical behavior. The fundamental insight on the thiol functionality suggests a further rational design of multi-functional interfaces to achieve better Li-S performance.

Citation Format(s)

A multi-functional interface derived from thiol-modified mesoporous carbon in lithium-sulfur batteries. / Li, Yun; Murphy, Ian A.; Chen, Ying; Lin, Francis; Wang, Xiang; Wang, Shanyu; Hubble, Dion; Jang, Sei-Hum; Muller, Karl T.; Wang, Chongmin; Jen, Alex K.-Y.; Yang, Jihui.

In: Journal of Materials Chemistry A, Vol. 7, No. 21, 07.06.2019, p. 13372-13381.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review