Fe3O4-Decorated Porous Graphene Interlayer for High-Performance Lithium-Sulfur Batteries

Yuanming Liu, Xianying Qin, Shaoqiong Zhang, Gemeng Liang, Feiyu Kang, Guohua Chen, Baohua Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

66 Citations (Scopus)

Abstract

Lithium-sulfur (Li-S) batteries are seriously restrained by the shuttling effect of intermediary products and their further reduction on the anode surface. Considerable researches have been devoted to overcoming these issues by introducing carbon-based materials as the sulfur host or interlayer in the Li-S systems. Herein, we constructed a multifunctional interlayer on a separator by inserting Fe3O4 nanoparticles (NPs) in a porous graphene (PG) film to immobilize polysulfides effectively. The porous structure of graphene was optimized by controlling the oxidation conditions for facilitating ion transfer. The polar Fe3O4 NPs were employed to trap sulfur species via strong chemical interaction. By exploiting the PG-Fe3O4 interlayer with optimal porous structure and component, the Li-S battery delivered a superior cycling performance and rate capability. The reversible discharge capacity could be maintained at 732 mAh g-1 after 500 cycles and 356 mAh g-1 after total 2000 cycles at 1 C with a final capacity retention of 49%. Moreover, a capacity of 589 mAh g-1 could also be maintained even at 2 C rate.

Original languageEnglish
Pages (from-to)26264-26273
Number of pages10
JournalACS Applied Materials and Interfaces
Volume10
Issue number31
DOIs
Publication statusPublished - 8 Aug 2018

Keywords

  • FeO nanoparticles
  • interlayer
  • lithium-sulfur batteries
  • multifunctional
  • porous graphene

ASJC Scopus subject areas

  • Materials Science(all)

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