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Amorphization-induced surface electronic states modulation of cobaltous oxide nanosheets for lithium-sulfur batteries

Author

Listed:
  • Ruilong Li

    (University of Science and Technology of China
    University of Science and Technology of China)

  • Dewei Rao

    (Jiangsu University)

  • Jianbin Zhou

    (University of Science and Technology of China)

  • Geng Wu

    (University of Science and Technology of China)

  • Guanzhong Wang

    (University of Science and Technology of China)

  • Zixuan Zhu

    (University of Science and Technology of China)

  • Xiao Han

    (University of Science and Technology of China)

  • Rongbo Sun

    (University of Science and Technology of China)

  • Hai Li

    (Nanjing Technology University)

  • Chao Wang

    (University of Science and Technology of China)

  • Wensheng Yan

    (University of Science and Technology of China)

  • Xusheng Zheng

    (University of Science and Technology of China)

  • Peixin Cui

    (Chinese Academy of Sciences)

  • Yuen Wu

    (University of Science and Technology of China)

  • Gongming Wang

    (University of Science and Technology of China)

  • Xun Hong

    (University of Science and Technology of China)

Abstract

Lithium-sulfur batteries show great potential to achieve high-energy-density storage, but their long-term stability is still limited due to the shuttle effect caused by the dissolution of polysulfides into electrolyte. Herein, we report a strategy of significantly improving the polysulfides adsorption capability of cobaltous oxide by amorphization-induced surface electronic states modulation. The amorphous cobaltous oxide nanosheets as the cathode additives for lithium-sulfur batteries demonstrates the rate capability and cycling stability with an initial capacity of 1248.2 mAh g-1 at 1 C and a substantial capacity retention of 1037.3 mAh g-1 after 500 cycles. X-ray absorption spectroscopy analysis reveal that the coordination structures and symmetry of ligand field around Co atoms of cobaltous oxide nanosheets are notably changed after amorphization. Moreover, DFT studies further indicate that amorphization-induced re-distribution of d orbital makes more electrons occupy high energy level, thereby resulting in a high binding energy with polysulfides for favorable adsorption.

Suggested Citation

  • Ruilong Li & Dewei Rao & Jianbin Zhou & Geng Wu & Guanzhong Wang & Zixuan Zhu & Xiao Han & Rongbo Sun & Hai Li & Chao Wang & Wensheng Yan & Xusheng Zheng & Peixin Cui & Yuen Wu & Gongming Wang & Xun H, 2021. "Amorphization-induced surface electronic states modulation of cobaltous oxide nanosheets for lithium-sulfur batteries," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-23349-9
    DOI: 10.1038/s41467-021-23349-9
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    Cited by:

    1. Zhiyuan Han & An Chen & Zejian Li & Mengtian Zhang & Zhilong Wang & Lixue Yang & Runhua Gao & Yeyang Jia & Guanjun Ji & Zhoujie Lao & Xiao Xiao & Kehao Tao & Jing Gao & Wei Lv & Tianshuai Wang & Jinji, 2024. "Machine learning-based design of electrocatalytic materials towards high-energy lithium||sulfur batteries development," Nature Communications, Nature, vol. 15(1), pages 1-13, December.

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