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Uniform yolk-shell iron sulfide–carbon nanospheres for superior sodium–iron sulfide batteries

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  • Yun-Xiao Wang

    (Institute for Superconducting and Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong
    Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis, iChEM, Fudan University)

  • Jianping Yang

    (Institute for Superconducting and Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong
    Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis, iChEM, Fudan University
    State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University)

  • Shu-Lei Chou

    (Institute for Superconducting and Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong)

  • Hua Kun Liu

    (Institute for Superconducting and Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong)

  • Wei-xian Zhang

    (State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University)

  • Dongyuan Zhao

    (Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis, iChEM, Fudan University)

  • Shi Xue Dou

    (Institute for Superconducting and Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong)

Abstract

Sodium–metal sulfide battery holds great promise for sustainable and cost-effective applications. Nevertheless, achieving high capacity and cycling stability remains a great challenge. Here, uniform yolk-shell iron sulfide–carbon nanospheres have been synthesized as cathode materials for the emerging sodium sulfide battery to achieve remarkable capacity of ∼545 mA h g−1 over 100 cycles at 0.2 C (100 mA g−1), delivering ultrahigh energy density of ∼438 Wh kg−1. The proven conversion reaction between sodium and iron sulfide results in high capacity but severe volume changes. Nanostructural design, including of nanosized iron sulfide yolks (∼170 nm) with porous carbon shells (∼30 nm) and extra void space (∼20 nm) in between, has been used to achieve excellent cycling performance without sacrificing capacity. This sustainable sodium–iron sulfide battery is a promising candidate for stationary energy storage. Furthermore, this spatially confined sulfuration strategy offers a general method for other yolk-shell metal sulfide–carbon composites.

Suggested Citation

  • Yun-Xiao Wang & Jianping Yang & Shu-Lei Chou & Hua Kun Liu & Wei-xian Zhang & Dongyuan Zhao & Shi Xue Dou, 2015. "Uniform yolk-shell iron sulfide–carbon nanospheres for superior sodium–iron sulfide batteries," Nature Communications, Nature, vol. 6(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms9689
    DOI: 10.1038/ncomms9689
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    1. Hooshyari, Khadijeh & Heydari, Samira & Beydaghi, Hossein & Rajabi, Hamid Reza, 2022. "New nanocomposite membranes based on sulfonated poly (phthalazinone ether ketone) and Fe3O4@SiO2@ resorcinol–aldehyde–SO3H for PEMFCs," Renewable Energy, Elsevier, vol. 186(C), pages 115-125.

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