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Reversible electrochemical oxidation of sulfur in ionic liquid for high-voltage Al−S batteries

Author

Listed:
  • Huan Li

    (The University of Adelaide)

  • Rongwei Meng

    (Tianjin University)

  • Yong Guo

    (Tianjin University)

  • Biao Chen

    (Tianjin University)

  • Yan Jiao

    (The University of Adelaide)

  • Chao Ye

    (The University of Adelaide)

  • Yu Long

    (Tianjin University)

  • Anton Tadich

    (Australian Synchrotron (ANSTO))

  • Quan-Hong Yang

    (Tianjin University)

  • Mietek Jaroniec

    (Kent State University)

  • Shi-Zhang Qiao

    (The University of Adelaide)

Abstract

Sulfur is an important electrode material in metal−sulfur batteries. It is usually coupled with metal anodes and undergoes electrochemical reduction to form metal sulfides. Herein, we demonstrate, for the first time, the reversible sulfur oxidation process in AlCl3/carbamide ionic liquid, where sulfur is electrochemically oxidized by AlCl4− to form AlSCl7. The sulfur oxidation is: 1) highly reversible with an efficiency of ~94%; and 2) workable within a wide range of high potentials. As a result, the Al−S battery based on sulfur oxidation can be cycled steadily around ~1.8 V, which is the highest operation voltage in Al−S batteries. The study of sulfur oxidation process benefits the understanding of sulfur chemistry and provides a valuable inspiration for the design of other high-voltage metal−sulfur batteries, not limited to Al−S configurations.

Suggested Citation

  • Huan Li & Rongwei Meng & Yong Guo & Biao Chen & Yan Jiao & Chao Ye & Yu Long & Anton Tadich & Quan-Hong Yang & Mietek Jaroniec & Shi-Zhang Qiao, 2021. "Reversible electrochemical oxidation of sulfur in ionic liquid for high-voltage Al−S batteries," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-26056-7
    DOI: 10.1038/s41467-021-26056-7
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    Cited by:

    1. Jiashen Meng & Xufeng Hong & Zhitong Xiao & Linhan Xu & Lujun Zhu & Yongfeng Jia & Fang Liu & Liqiang Mai & Quanquan Pang, 2024. "Rapid-charging aluminium-sulfur batteries operated at 85 °C with a quaternary molten salt electrolyte," Nature Communications, Nature, vol. 15(1), pages 1-10, December.

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