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Long-life Li/polysulphide batteries with high sulphur loading enabled by lightweight three-dimensional nitrogen/sulphur-codoped graphene sponge

Author

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  • Guangmin Zhou

    (Materials Science and Engineering Program & Texas Materials Institute, The University of Texas at Austin, 204 East Dean Keeton Street, Mail Stop: C2200, Austin, Texas 78712, USA.)

  • Eunsu Paek

    (The University of Texas at Austin, 204 East Dean Keeton Street, Mail Stop: C2200, Austin, Texas 78712, USA.)

  • Gyeong S. Hwang

    (The University of Texas at Austin, 204 East Dean Keeton Street, Mail Stop: C2200, Austin, Texas 78712, USA.)

  • Arumugam Manthiram

    (Materials Science and Engineering Program & Texas Materials Institute, The University of Texas at Austin, 204 East Dean Keeton Street, Mail Stop: C2200, Austin, Texas 78712, USA.)

Abstract

Lithium–sulphur batteries with a high theoretical energy density are regarded as promising energy storage devices for electric vehicles and large-scale electricity storage. However, the low active material utilization, low sulphur loading and poor cycling stability restrict their practical applications. Herein, we present an effective strategy to obtain Li/polysulphide batteries with high-energy density and long-cyclic life using three-dimensional nitrogen/sulphur codoped graphene sponge electrodes. The nitrogen/sulphur codoped graphene sponge electrode provides enough space for a high sulphur loading, facilitates fast charge transfer and better immobilization of polysulphide ions. The hetero-doped nitrogen/sulphur sites are demonstrated to show strong binding energy and be capable of anchoring polysulphides based on first-principles calculations. As a result, a high specific capacity of 1,200 mAh g−1 at 0.2C rate, a high-rate capacity of 430 mAh g−1 at 2C rate and excellent cycling stability for 500 cycles with ∼0.078% capacity decay per cycle are achieved.

Suggested Citation

  • Guangmin Zhou & Eunsu Paek & Gyeong S. Hwang & Arumugam Manthiram, 2015. "Long-life Li/polysulphide batteries with high sulphur loading enabled by lightweight three-dimensional nitrogen/sulphur-codoped graphene sponge," Nature Communications, Nature, vol. 6(1), pages 1-11, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms8760
    DOI: 10.1038/ncomms8760
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    Cited by:

    1. Capkova, Dominika & Knap, Vaclav & Fedorkova, Andrea Strakova & Stroe, Daniel-Ioan, 2023. "Investigation of the temperature and DOD effect on the performance-degradation behavior of lithium–sulfur pouch cells during calendar aging," Applied Energy, Elsevier, vol. 332(C).
    2. Lee, Won Yeol & Jin, En Mei & Cho, Jung Sang & Kang, Dong-Won & Jin, Bo & Jeong, Sang Mun, 2020. "Freestanding flexible multilayered Sulfur–Carbon nanotubes for Lithium–Sulfur battery cathodes," Energy, Elsevier, vol. 212(C).

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