Skip to main content
placeholder image

A pyrolyzed polyacrylonitrile/selenium disulfide composite cathode with remarkable lithium and sodium storage performances

Journal Article


Abstract


  • As a special class of cathode materials for lithium-sulfur batteries, pyrolyzed polyacrylonitrile/sulfur (pPAN/S) can completely solve the polysulfide dissolution problem and deliver reliable performance. However, the applicable S contents of pPAN/S are usually lower than 50 weight % (wt %), and their capacity utilizations are not sufficient, both of which greatly limit their energy densities for commercial applications. We report a pyrolyzed polyacrylonitrile/selenium disulfide (pPAN/SeS2) composite with dramatically enhanced active material content (63 wt %) and superior performances for both lithium and sodium storage. As a result, pPAN/SeS2 delivers high capacity of >1100 mAh g−1 at 0.2 A g−1 for Li storage with extremely stable cycle life over 2000 cycles at 4.0 A g−1. Moreover, when applied in a room temperature Na-SeS2 battery, pPAN/SeS2 achieves superior capacity of >900 mAh g−1 at 0.1 A g−1 and delivers prolonged cycle life over 400 cycles at 1.0 A g−1.

UOW Authors


  •   Li, Zhen (external author)
  •   Zhang, Jintao (external author)
  •   Lu, Yan (external author)
  •   Lou, Xiongwen (external author)

Publication Date


  • 2018

Citation


  • Li, Z., Zhang, J., Lu, Y. & Lou, X. (2018). A pyrolyzed polyacrylonitrile/selenium disulfide composite cathode with remarkable lithium and sodium storage performances. Science Advances, 4 (6), eaat1687-1-eaat1687-11.

Scopus Eid


  • 2-s2.0-85048306340

Start Page


  • eaat1687-1

End Page


  • eaat1687-11

Volume


  • 4

Issue


  • 6

Place Of Publication


  • United States

Abstract


  • As a special class of cathode materials for lithium-sulfur batteries, pyrolyzed polyacrylonitrile/sulfur (pPAN/S) can completely solve the polysulfide dissolution problem and deliver reliable performance. However, the applicable S contents of pPAN/S are usually lower than 50 weight % (wt %), and their capacity utilizations are not sufficient, both of which greatly limit their energy densities for commercial applications. We report a pyrolyzed polyacrylonitrile/selenium disulfide (pPAN/SeS2) composite with dramatically enhanced active material content (63 wt %) and superior performances for both lithium and sodium storage. As a result, pPAN/SeS2 delivers high capacity of >1100 mAh g−1 at 0.2 A g−1 for Li storage with extremely stable cycle life over 2000 cycles at 4.0 A g−1. Moreover, when applied in a room temperature Na-SeS2 battery, pPAN/SeS2 achieves superior capacity of >900 mAh g−1 at 0.1 A g−1 and delivers prolonged cycle life over 400 cycles at 1.0 A g−1.

UOW Authors


  •   Li, Zhen (external author)
  •   Zhang, Jintao (external author)
  •   Lu, Yan (external author)
  •   Lou, Xiongwen (external author)

Publication Date


  • 2018

Citation


  • Li, Z., Zhang, J., Lu, Y. & Lou, X. (2018). A pyrolyzed polyacrylonitrile/selenium disulfide composite cathode with remarkable lithium and sodium storage performances. Science Advances, 4 (6), eaat1687-1-eaat1687-11.

Scopus Eid


  • 2-s2.0-85048306340

Start Page


  • eaat1687-1

End Page


  • eaat1687-11

Volume


  • 4

Issue


  • 6

Place Of Publication


  • United States