An interwoven MoO3@CNT scaffold interlayer for high-performance lithium-sulfur batteries

Laiyan Luo, Xianying Qin, Junxiong Wu, Gemeng Liang, Qing Li, Ming Liu, Feiyu Kang, Guohua Chen, Baohua Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

110 Citations (Scopus)

Abstract

Lithium-sulfur (Li-S) batteries have attracted increasing attention in the past few decades due to the extremely high energy density, low cost and non-toxicity of sulfur. But the poor conductivity of sulfur and particularly the migration of soluble polysulfides greatly hindered the application of Li-S batteries. Herein, we report a novel strategy for trapping polysulfides by coating a separator with an interwoven framework of MoO3 nanorods and carbon nanotubes (CNTs) as the interlayer in Li-S batteries. The interwoven scaffold-like MoO3@CNT network provides abundant conducting channels and pathways for ions and electrons, leading to high rate capabilities. While the MoO3@CNT interlayer acting as a barrier effectively mitigates the shuttle effect in Li-S batteries, the MoO3 nanorods enfolded by CNTs uniformly play an important role in immobilizing sulfur species. Consequently, the electrochemical performances of Li-S batteries are improved, giving rise to higher capacities with a longer cycling life. The Li-S batteries with the MoO3@CNT interlayer can deliver a specific capacity of 755 mA h g-1 after 200 cycles at a current density of 0.3C, and show an excellent rate capability with a capacity of 655 mA h g-1 at 3C.

Original languageEnglish
Pages (from-to)8612-8619
Number of pages8
JournalJournal of Materials Chemistry A
Volume6
Issue number18
DOIs
Publication statusPublished - 1 Jan 2018

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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