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

Journal Article


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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.

Publication Date


  • 2015

Citation


  • Wang, Y., Yang, J., Chou, S., Liu, H. Kun., Zhang, W., Zhao, D. & Dou, S. Xue. (2015). Uniform yolk-shell iron sulfide-carbon nanospheres for superior sodium-iron sulfide batteries. Nature Communications, 6 (October), 8689-1-8689-9.

Scopus Eid


  • 2-s2.0-84945559802

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2654&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1652

Start Page


  • 8689-1

End Page


  • 8689-9

Volume


  • 6

Issue


  • October

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.

Publication Date


  • 2015

Citation


  • Wang, Y., Yang, J., Chou, S., Liu, H. Kun., Zhang, W., Zhao, D. & Dou, S. Xue. (2015). Uniform yolk-shell iron sulfide-carbon nanospheres for superior sodium-iron sulfide batteries. Nature Communications, 6 (October), 8689-1-8689-9.

Scopus Eid


  • 2-s2.0-84945559802

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2654&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1652

Start Page


  • 8689-1

End Page


  • 8689-9

Volume


  • 6

Issue


  • October