Nanospace-confinement copolymerization strategy for encapsulating polymeric sulfur into porous carbon for lithium-sulfur batteries

Bing Ding, Zhi Chang, Guiyin Xu, Ping Nie, Jie Wang, Jin Pan, Hui Dou, Xiaogang Zhang

Research output: Contribution to journalArticlepeer-review

Abstract

Given their high theoretical energy density, lithium-sulfur (Li-S) batteries have recently attracted ever-increasing research interest. However, the dissolution of polysulfides and uncontrolled deposition of insoluble discharge product significantly hinder the cycling stability. Herein, a nanospace-confinement copolymerization strategy for encapsulating polymeric sulfur into porous carbon matrix is presented. The morphologies and sulfur contents of carbon/polymeric sulfur (C/PS) composites could be readily tailored by controlling the copolymerization time. Confining polymeric sulfur in the porous carbon with abundant interparticle pores facilitates rapid electronic/ionic transport and mitigates dissolution of polysulfides intermediates. More importantly, the organic sulfur units dispersed in the insoluble/insulating Li2S2/Li2S phase could prevent its irreversible deposition. Such nanostructure with tailored chemistry property permits the C/PS electrodes to exhibit enhanced cycling stability and high rate capability. The nanospace-confinement copolymerization strategy features general and facial advantages, which may provide new opportunities for the future development of advanced sulfur cathodes.

Original languageEnglish
Pages (from-to)11165-11171
Number of pages7
JournalACS Applied Materials and Interfaces
Volume7
Issue number21
DOIs
Publication statusPublished - 2015 Jun 3
Externally publishedYes

Keywords

  • carbon/polymeric sulfur composites
  • copolymerization
  • electrochemistry
  • lithium-sulfur batteries
  • nanospace-confinement

ASJC Scopus subject areas

  • Materials Science(all)

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