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Sulphur-impregnated flow cathode to enable high-energy-density lithium flow batteries

Author

Listed:
  • Hongning Chen

    (The Chinese University of Hong Kong)

  • Qingli Zou

    (The Chinese University of Hong Kong)

  • Zhuojian Liang

    (The Chinese University of Hong Kong
    Shun Hing Institute of Advanced Engineering, The Chinese University of Hong Kong)

  • Hao Liu

    (The Chinese University of Hong Kong)

  • Quan Li

    (The Chinese University of Hong Kong)

  • Yi-Chun Lu

    (The Chinese University of Hong Kong
    Shun Hing Institute of Advanced Engineering, The Chinese University of Hong Kong)

Abstract

Redox flow batteries are promising technologies for large-scale electricity storage, but have been suffering from low energy density and low volumetric capacity. Here we report a flow cathode that exploits highly concentrated sulphur-impregnated carbon composite, to achieve a catholyte volumetric capacity 294 Ah l−1 with long cycle life (>100 cycles), high columbic efficiency (>90%, 100 cycles) and high energy efficiency (>80%, 100 cycles). The demonstrated catholyte volumetric capacity is five times higher than the all-vanadium flow batteries (60 Ah l−1) and 3–6 times higher than the demonstrated lithium-polysulphide approaches (50–117 Ah l−1). Pseudo-in situ impedance and microscopy characterizations reveal superior electrochemical and morphological reversibility of the sulphur redox reactions. Our approach of exploiting sulphur-impregnated carbon composite in the flow cathode creates effective interfaces between the insulating sulphur and conductive carbon-percolating network and offers a promising direction to develop high-energy-density flow batteries.

Suggested Citation

  • Hongning Chen & Qingli Zou & Zhuojian Liang & Hao Liu & Quan Li & Yi-Chun Lu, 2015. "Sulphur-impregnated flow cathode to enable high-energy-density lithium flow batteries," Nature Communications, Nature, vol. 6(1), pages 1-9, May.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms6877
    DOI: 10.1038/ncomms6877
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    Cited by:

    1. Meiping Zhang & Yanqi Zhang & Jiajia Cui & Zongyao Zhang & Zaoxue Yan, 2022. "Biomass-Based Oxygen Reduction Reaction Catalysts from the Perspective of Ecological Aesthetics—Duckweed Has More Advantages than Soybean," Sustainability, MDPI, vol. 14(15), pages 1-15, July.

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