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Ether-compatible sulfurized polyacrylonitrile cathode with excellent performance enabled by fast kinetics via selenium doping

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  • Xin Chen

    (Huazhong University of Science and Technology
    Huazhong University of Science and Technology)

  • Linfeng Peng

    (Huazhong University of Science and Technology)

  • Lihui Wang

    (Huazhong University of Science and Technology
    Huazhong University of Science and Technology)

  • Jiaqiang Yang

    (Huazhong University of Science and Technology)

  • Zhangxiang Hao

    (Huazhong University of Science and Technology)

  • Jingwei Xiang

    (Huazhong University of Science and Technology)

  • Kai Yuan

    (Huazhong University of Science and Technology)

  • Yunhui Huang

    (Huazhong University of Science and Technology)

  • Bin Shan

    (Huazhong University of Science and Technology)

  • Lixia Yuan

    (Huazhong University of Science and Technology)

  • Jia Xie

    (Huazhong University of Science and Technology)

Abstract

Sulfurized polyacrylonitrile is suggested to contain Sn (n ≤ 4) and shows good electrochemical performance in carbonate electrolytes for lithium sulfur batteries. However inferior results in ether electrolytes suggest that high solubility of Li2Sn (n ≤ 4) trumps the limited redox conversion, leading to dissolution and shuttling. Here, we introduce a small amount of selenium in sulfurized polyacrylonitrile to accelerate the redox conversion, delivering excellent performance in both carbonate and ether electrolytes, including high reversible capacity (1300 mA h g−1 at 0.2 A g−1), 84% active material utilization and high rate (capacity up to 900 mA h g−1 at 10 A g−1). These cathodes can undergo 800 cycles with nearly 100% Coulombic efficiency and ultralow 0.029% capacity decay per cycle. Polysulfide dissolution is successfully suppressed by enhanced reaction kinetics. This work demonstrates an ether compatible sulfur cathode involving intermediate Li2Sn (n ≤ 4), attractive rate and cycling performance, and a promising solution towards applicable lithium-sulfur batteries.

Suggested Citation

  • Xin Chen & Linfeng Peng & Lihui Wang & Jiaqiang Yang & Zhangxiang Hao & Jingwei Xiang & Kai Yuan & Yunhui Huang & Bin Shan & Lixia Yuan & Jia Xie, 2019. "Ether-compatible sulfurized polyacrylonitrile cathode with excellent performance enabled by fast kinetics via selenium doping," Nature Communications, Nature, vol. 10(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-08818-6
    DOI: 10.1038/s41467-019-08818-6
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    Cited by:

    1. Wang, Yu & Zhang, Yunpeng & Shuai, Yi & Chen, Kanghua, 2021. "Diphenyl guanidine vulcanization accelerators enable sulfurized polyacrylonitrile cathode for high capacity and ether-compatible by fast kinetic," Energy, Elsevier, vol. 233(C).
    2. Siwu Li & Haolin Zhu & Yuan Liu & Zhilong Han & Linfeng Peng & Shuping Li & Chuang Yu & Shijie Cheng & Jia Xie, 2022. "Codoped porous carbon nanofibres as a potassium metal host for nonaqueous K-ion batteries," Nature Communications, Nature, vol. 13(1), pages 1-13, December.

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