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Design towards recyclable micron-sized Na2S cathode with self-refinement mechanism

Author

Listed:
  • Suwan Lu

    (University of Science and Technology of China
    Chinese Academy of Sciences)

  • Yang Liu

    (University of Science and Technology of China
    Chinese Academy of Sciences)

  • Jingjing Xu

    (University of Science and Technology of China
    Chinese Academy of Sciences
    Hohai University)

  • Shixiao Weng

    (University of Science and Technology of China
    Chinese Academy of Sciences)

  • Jiangyan Xue

    (Chinese Academy of Sciences)

  • Lingwang Liu

    (University of Science and Technology of China
    Chinese Academy of Sciences)

  • Zhicheng Wang

    (Tianmu Lake Institute of Advanced Energy Storage Technologies Co., Ltd
    Chinese Academy of Sciences)

  • Can Qian

    (Tianmu Lake Institute of Advanced Energy Storage Technologies Co., Ltd)

  • Guochao Sun

    (University of Science and Technology of China
    Chinese Academy of Sciences)

  • Yiwen Gao

    (Chinese Academy of Sciences)

  • Qingyu Dong

    (Chinese Academy of Sciences)

  • Hong Li

    (Tianmu Lake Institute of Advanced Energy Storage Technologies Co., Ltd
    Chinese Academy of Sciences)

  • Xiaodong Wu

    (University of Science and Technology of China
    Chinese Academy of Sciences
    Tianmu Lake Institute of Advanced Energy Storage Technologies Co., Ltd)

Abstract

Sodium sulfide (Na2S) as an initial cathode material in room-temperature sodium-sulfur batteries is conducive to get rid of the dependence on Na-metal anode. However, the micron-sized Na2S that accords with the practical requirements is obstructed due to poor kinetics and severe shuttle effect. Herein, a subtle strategy is proposed via regulating Na2S redeposition behaviours. By the synergistic effect from both conductive structure and cuprous sulfide (Cu2S) catalysis, the micron-sized Na2S particles are broken down and redeposited to nano-size during the initial cycle which can be fully utilized in subsequent cycles. Consequently, the Na2S/CPVP@Cu2S||Na cell delivers excellent cyclability (670 mAh gS−1 after 500 cycles) with a remarkable average Coulombic efficiency over 99.7% and rate capability (480 mAh gS−1 at 4 A gS−1). Besides, the Na-free anodes are used to prove the application prospects. This work provides an innovative idea for utilizing micron-sized Na2S and offers insights into its conversion pathway.

Suggested Citation

  • Suwan Lu & Yang Liu & Jingjing Xu & Shixiao Weng & Jiangyan Xue & Lingwang Liu & Zhicheng Wang & Can Qian & Guochao Sun & Yiwen Gao & Qingyu Dong & Hong Li & Xiaodong Wu, 2024. "Design towards recyclable micron-sized Na2S cathode with self-refinement mechanism," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-54316-9
    DOI: 10.1038/s41467-024-54316-9
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    References listed on IDEAS

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    1. Xiaofu Xu & Dong Zhou & Xianying Qin & Kui Lin & Feiyu Kang & Baohua Li & Devaraj Shanmukaraj & Teofilo Rojo & Michel Armand & Guoxiu Wang, 2018. "A room-temperature sodium–sulfur battery with high capacity and stable cycling performance," Nature Communications, Nature, vol. 9(1), pages 1-12, December.
    2. Wei Zhang & Jiangwei Zhang & Nan Wang & Kerun Zhu & Chaochao Yang & Yan Ai & Fengmei Wang & Yong Tian & Yuzhu Ma & Yao Ma & Xingmiao Zhang & Linlin Duan & Dongliang Chao & Fei Wang & Dongyuan Zhao & W, 2024. "Two-electron redox chemistry via single-atom catalyst for reversible zinc–air batteries," Nature Sustainability, Nature, vol. 7(4), pages 463-473, April.
    3. Shuya Wei & Shaomao Xu & Akanksha Agrawral & Snehashis Choudhury & Yingying Lu & Zhengyuan Tu & Lin Ma & Lynden A. Archer, 2016. "A stable room-temperature sodium–sulfur battery," Nature Communications, Nature, vol. 7(1), pages 1-10, September.
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