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Manipulating Li2S2/Li2S mixed discharge products of all-solid-state lithium sulfur batteries for improved cycle life

Author

Listed:
  • Jung Tae Kim

    (University of Western Ontario)

  • Adwitiya Rao

    (University of Toronto)

  • Heng-Yong Nie

    (University of Western Ontario
    University of Western Ontario)

  • Yang Hu

    (University of Western Ontario)

  • Weihan Li

    (University of Western Ontario)

  • Feipeng Zhao

    (University of Western Ontario)

  • Sixu Deng

    (University of Western Ontario)

  • Xiaoge Hao

    (University of Western Ontario)

  • Jiamin Fu

    (University of Western Ontario)

  • Jing Luo

    (University of Western Ontario)

  • Hui Duan

    (University of Western Ontario)

  • Changhong Wang

    (University of Western Ontario
    Eastern Institute of Technology)

  • Chandra Veer Singh

    (University of Toronto)

  • Xueliang Sun

    (University of Western Ontario
    Eastern Institute of Technology)

Abstract

All-solid-state lithium-sulfur batteries offer a compelling opportunity for next-generation energy storage, due to their high theoretical energy density, low cost, and improved safety. However, their widespread adoption is hindered by an inadequate understanding of their discharge products. Using X-ray absorption spectroscopy and time-of-flight secondary ion mass spectrometry, we reveal that the discharge product of all-solid-state lithium-sulfur batteries is not solely composed of Li2S, but rather consists of a mixture of Li2S and Li2S2. Employing this insight, we propose an integrated strategy that: (1) manipulates the lower cutoff potential to promote a Li2S2-dominant discharge product and (2) incorporates a trace amount of solid-state catalyst (LiI) into the S composite electrode. This approach leads to all-solid-state cells with a Li-In alloy negative electrode that deliver a reversible capacity of 979.6 mAh g−1 for 1500 cycles at 2.0 A g−1 at 25 °C. Our findings provide crucial insights into the discharge products of all-solid-state lithium-sulfur batteries and may offer a feasible approach to enhance their overall performance.

Suggested Citation

  • Jung Tae Kim & Adwitiya Rao & Heng-Yong Nie & Yang Hu & Weihan Li & Feipeng Zhao & Sixu Deng & Xiaoge Hao & Jiamin Fu & Jing Luo & Hui Duan & Changhong Wang & Chandra Veer Singh & Xueliang Sun, 2023. "Manipulating Li2S2/Li2S mixed discharge products of all-solid-state lithium sulfur batteries for improved cycle life," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-42109-5
    DOI: 10.1038/s41467-023-42109-5
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    References listed on IDEAS

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    1. Marco-Tulio F. Rodrigues & Ganguli Babu & Hemtej Gullapalli & Kaushik Kalaga & Farheen N. Sayed & Keiko Kato & Jarin Joyner & Pulickel M. Ajayan, 2017. "A materials perspective on Li-ion batteries at extreme temperatures," Nature Energy, Nature, vol. 2(8), pages 1-14, August.
    2. Yu-Sheng Su & Yongzhu Fu & Thomas Cochell & Arumugam Manthiram, 2013. "A strategic approach to recharging lithium-sulphur batteries for long cycle life," Nature Communications, Nature, vol. 4(1), pages 1-8, December.
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