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In situ wrapping of the cathode material in lithium-sulfur batteries

Author

Listed:
  • Chenji Hu

    (Chinese Academy of Sciences)

  • Hongwei Chen

    (Huaqiao University)

  • Yanbin Shen

    (Chinese Academy of Sciences)

  • Di Lu

    (Chinese Academy of Sciences)

  • Yanfei Zhao

    (Chinese Academy of Sciences)

  • An-Hui Lu

    (Dalian University of Technology)

  • Xiaodong Wu

    (Chinese Academy of Sciences)

  • Wei Lu

    (Chinese Academy of Sciences)

  • Liwei Chen

    (Chinese Academy of Sciences
    Chinese Academy of Sciences)

Abstract

While lithium–sulfur batteries are poised to be the next-generation high-density energy storage devices, the intrinsic polysulfide shuttle has limited their practical applications. Many recent investigations have focused on the development of methods to wrap the sulfur material with a diffusion barrier layer. However, there is a trade-off between a perfect preassembled wrapping layer and electrolyte infiltration into the wrapped sulfur cathode. Here, we demonstrate an in situ wrapping approach to construct a compact layer on carbon/sulfur composite particles with an imperfect wrapping layer. This special configuration suppresses the shuttle effect while allowing polysulfide diffusion within the interior of the wrapped composite particles. As a result, the wrapped cathode for lithium–sulfur batteries greatly improves the Coulombic efficiency and cycle life. Importantly, the capacity decay of the cell at 1000 cycles is as small as 0.03% per cycle at 1672 mA g–1.

Suggested Citation

  • Chenji Hu & Hongwei Chen & Yanbin Shen & Di Lu & Yanfei Zhao & An-Hui Lu & Xiaodong Wu & Wei Lu & Liwei Chen, 2017. "In situ wrapping of the cathode material in lithium-sulfur batteries," Nature Communications, Nature, vol. 8(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-00656-8
    DOI: 10.1038/s41467-017-00656-8
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