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Enhanced lithium polysulfide adsorption on an iron-oxide-modified separator for Li-S batteries

Chemical Communications, ISSN: 1364-548X, Vol: 59, Issue: 20, Page: 2966-2969
2023
  • 19
    Citations
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  • 5
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Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    19
    • Citation Indexes
      19
  • Captures
    5

Article Description

Lithium-sulfur (Li-S) batteries are candidates for next-generation energy storage systems because of their low cost, high theoretical specific capacity and safety. However, the serious lithium polysulfide (LiPS) shuttle effect leads to a loss of reactive active substances and reduction of coulombic efficiency. In the current work, iron oxide (IO-700)—prepared by calcining a mixture of carbon spheres and ferric nitrate under an air atmosphere at 700 °C—was designed as a separator modifier to effectively adsorb LiPSs and accelerate the kinetics of the transformation of the intermediates, thereby inhibiting the shuttle effect. Li-S batteries including IO-700 showed long-term stability for 1000 cycles at 1C, with a capacity decay rate per cycle of only 0.0487%. A theoretical calculation indicated that, due to strongly polar active sites, FeO adsorbed LiPSs effectively to suppress the shuttle effect. This work has highlighted the importance for Li-S batteries of strongly polar active sites for anchoring LiPSs to inhibit the shuttle effect.

Bibliographic Details

Wu, Jiao; Feng, Qingguo; Wang, Yuchao; Wang, Jinxian; Zhao, Xin; Zhan, Longsheng; Liu, Mengjie; Jin, Zhaoqing; Chen, Zhiyan; Lei, Yongpeng

Royal Society of Chemistry (RSC)

Materials Science; Chemical Engineering; Chemistry

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