Defect-Rich Amorphous Iron-Based Oxide/Graphene Hybrid-Modified Separator toward the Efficient Capture and Catalysis of Polysulfides

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

20 Scopus Citations
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Author(s)

  • Jiefei Liu
  • Yu Zhou
  • Xiaofeng Huang
  • Qiqi Liu
  • Fuming Chen
  • Haiqing Qin
  • Hongtao Lou
  • Denis Y. W. Yu
  • Xianhua Hou

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)41698–41706
Journal / PublicationACS Applied Materials and Interfaces
Volume13
Issue number35
Online published27 Aug 2021
Publication statusPublished - 8 Sept 2021

Abstract

The sluggish sulfur reduction reaction, severe shuttle effect, and poor conductivity of sulfur species are three main problems in lithium-sulfur (Li-S) batteries. Functional materials with a strong affinity and catalytic effect toward polysulfides play a key role in addressing these issues. Herein, we report a defect-rich amorphous a-Fe3O4-x/GO material with a nanocube-interlocked structure as an adsorber as well as an electrocatalyst for the Li-S battery. The composition and defect structure of the material are determined by X-ray diffraction, high-resolution transmission electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy measurements. The distinctive open framework architecture of the as-engineered composite inherited from the metal-organic framework precursor ensures the stability and activity of the catalyst during extended cycles. The oxygen defects in the amorphous structure are capable of absorbing polysulfides and similarly work as catalytic centers to boost polysulfide conversion. Taking advantage of a-Fe3O4-x/GO on the separator surface, the Li-S battery shows a capacity over 610 mA h g-1 at 1 C and a low decay rate of 0.12% per cycle over 500 cycles and superior rate capability. The functional material made via the low-cost synthesis process provides a potential solution for advanced Li-S batteries.

Research Area(s)

  • amorphous, electrocatalyst, lithium-sulfur batteries, modified separator, oxygen defect, polysulfides

Citation Format(s)

Defect-Rich Amorphous Iron-Based Oxide/Graphene Hybrid-Modified Separator toward the Efficient Capture and Catalysis of Polysulfides. / Zhao, Yu; Liu, Jiefei; Zhou, Yu et al.
In: ACS Applied Materials and Interfaces, Vol. 13, No. 35, 08.09.2021, p. 41698–41706.

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