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High-performance room-temperature sodium-sulfur battery enabled by electrocatalytic sodium polysulfides full conversion

Journal Article


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Abstract


  • © 2020 The Royal Society of Chemistry. Room-temperature sodium-sulfur (RT-Na-S) batteries are highly desirable for grid-scale stationary energy storage due to their low cost; however, short cycling stability caused by the incomplete conversion of sodium polysulfides is a major issue for their application. Herein, we introduce an effective sulfiphilic host, gold nanodots decorated on hierarchical N-doped carbon microspheres (CN/Au/S), to achieve completely reversible conversion reactions in the S cathode by electrocatalyzing the low-kinetics conversion of Na2S4 into NaS2 (discharge process) or S (charge process). Besides, gold nanodots and N-doped carbon can increase the conductivity of the S cathode and provide strong polar-polar adsorption of sodium polysulfides to alleviate the shuttling effects. When serving as the cathode, the CN/Au/S composite can realize enhanced sulfur utilization, excellent cycling stability, and outstanding rate capability. This work deepens our understanding of the catalytic effect of gold atoms on sulfur molecules, opening a new avenue for cathode design and development of advanced RT-Na-S batteries.

Authors


  •   Wang, Nana
  •   Wang, Yun-Xiao
  •   Bai, Zhongchao (external author)
  •   Fang, Zhiwei (external author)
  •   Zhang, Xiao (external author)
  •   Xu, Zhongfei (external author)
  •   Ding, Yu (external author)
  •   Xu, Xun
  •   Du, Yi
  •   Dou, Shi Xue
  •   Yu, Guihua (external author)

Publication Date


  • 2020

Citation


  • Wang, N., Wang, Y., Bai, Z., Fang, Z., Zhang, X., Xu, Z., Ding, Y., Xu, X., Du, Y., Dou, S. & Yu, G. (2020). High-performance room-temperature sodium-sulfur battery enabled by electrocatalytic sodium polysulfides full conversion. Energy and Environmental Science, 13 (2), 562-570.

Scopus Eid


  • 2-s2.0-85081790409

Ro Full-text Url


  • https://ro.uow.edu.au/context/aiimpapers/article/5132/type/native/viewcontent

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/4077

Has Global Citation Frequency


Number Of Pages


  • 8

Start Page


  • 562

End Page


  • 570

Volume


  • 13

Issue


  • 2

Place Of Publication


  • United Kingdom

Abstract


  • © 2020 The Royal Society of Chemistry. Room-temperature sodium-sulfur (RT-Na-S) batteries are highly desirable for grid-scale stationary energy storage due to their low cost; however, short cycling stability caused by the incomplete conversion of sodium polysulfides is a major issue for their application. Herein, we introduce an effective sulfiphilic host, gold nanodots decorated on hierarchical N-doped carbon microspheres (CN/Au/S), to achieve completely reversible conversion reactions in the S cathode by electrocatalyzing the low-kinetics conversion of Na2S4 into NaS2 (discharge process) or S (charge process). Besides, gold nanodots and N-doped carbon can increase the conductivity of the S cathode and provide strong polar-polar adsorption of sodium polysulfides to alleviate the shuttling effects. When serving as the cathode, the CN/Au/S composite can realize enhanced sulfur utilization, excellent cycling stability, and outstanding rate capability. This work deepens our understanding of the catalytic effect of gold atoms on sulfur molecules, opening a new avenue for cathode design and development of advanced RT-Na-S batteries.

Authors


  •   Wang, Nana
  •   Wang, Yun-Xiao
  •   Bai, Zhongchao (external author)
  •   Fang, Zhiwei (external author)
  •   Zhang, Xiao (external author)
  •   Xu, Zhongfei (external author)
  •   Ding, Yu (external author)
  •   Xu, Xun
  •   Du, Yi
  •   Dou, Shi Xue
  •   Yu, Guihua (external author)

Publication Date


  • 2020

Citation


  • Wang, N., Wang, Y., Bai, Z., Fang, Z., Zhang, X., Xu, Z., Ding, Y., Xu, X., Du, Y., Dou, S. & Yu, G. (2020). High-performance room-temperature sodium-sulfur battery enabled by electrocatalytic sodium polysulfides full conversion. Energy and Environmental Science, 13 (2), 562-570.

Scopus Eid


  • 2-s2.0-85081790409

Ro Full-text Url


  • https://ro.uow.edu.au/context/aiimpapers/article/5132/type/native/viewcontent

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/4077

Has Global Citation Frequency


Number Of Pages


  • 8

Start Page


  • 562

End Page


  • 570

Volume


  • 13

Issue


  • 2

Place Of Publication


  • United Kingdom