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Synergistically Enhanced Interfacial Interaction to Polysulfide via N,O Dual-Doped Highly Porous Carbon Microrods for Advanced Lithium-Sulfur Batteries

Journal Article


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Abstract


  • Lithium-sulfur (Li-S) batteries have received tremendous attention because of their extremely high theoretical capacity (1672 mA h g -1 ) and energy density (2600 W h kg -1 ). Nevertheless, the commercialization of Li-S batteries has been blocked by the shuttle effect of lithium polysulfide intermediates, the insulating nature of sulfur, and the volume expansion during cycling. Here, hierarchical porous N,O dual-doped carbon microrods (NOCMs) were developed as sulfur host materials with a large pore volume (1.5 cm 3 g -1 ) and a high surface area (1147 m 2 g -1 ). The highly porous structure of the NOCMs can act as a physical barrier to lithium polysulfides, while N and O functional groups enhance the interfacial interaction to trap lithium polysulfides, permitting a high loading amount of sulfur (79-90 wt % in the composite). Benefiting from the physical and chemical anchoring effect to prevent shuttling of polysulfides, S@NOCMs composites successfully solve the problems of low sulfur utilization and fast capacity fade and exhibit a stable reversible capacity of 1071 mA h g -1 after 160 cycles with nearly 100% Coulombic efficiency at 0.2 C. The N,O dual doping treatment to porous carbon microrods paves a way toward rational design of high-performance Li-S cathodes with high energy density.

Authors


  •   Wang, Nana
  •   Xu, Zhongfei (external author)
  •   Xu, Xun
  •   Liao, Ting (external author)
  •   Tang, Bin (external author)
  •   Bai, Zhongchao (external author)
  •   Dou, Shi Xue

Publication Date


  • 2018

Citation


  • Wang, N., Xu, Z., Xu, X., Liao, T., Tang, B., Bai, Z. & Dou, S. (2018). Synergistically Enhanced Interfacial Interaction to Polysulfide via N,O Dual-Doped Highly Porous Carbon Microrods for Advanced Lithium-Sulfur Batteries. ACS Applied Materials and Interfaces, 10 (16), 13573-13580.

Scopus Eid


  • 2-s2.0-85045883180

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=4140&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3090

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 13573

End Page


  • 13580

Volume


  • 10

Issue


  • 16

Place Of Publication


  • United States

Abstract


  • Lithium-sulfur (Li-S) batteries have received tremendous attention because of their extremely high theoretical capacity (1672 mA h g -1 ) and energy density (2600 W h kg -1 ). Nevertheless, the commercialization of Li-S batteries has been blocked by the shuttle effect of lithium polysulfide intermediates, the insulating nature of sulfur, and the volume expansion during cycling. Here, hierarchical porous N,O dual-doped carbon microrods (NOCMs) were developed as sulfur host materials with a large pore volume (1.5 cm 3 g -1 ) and a high surface area (1147 m 2 g -1 ). The highly porous structure of the NOCMs can act as a physical barrier to lithium polysulfides, while N and O functional groups enhance the interfacial interaction to trap lithium polysulfides, permitting a high loading amount of sulfur (79-90 wt % in the composite). Benefiting from the physical and chemical anchoring effect to prevent shuttling of polysulfides, S@NOCMs composites successfully solve the problems of low sulfur utilization and fast capacity fade and exhibit a stable reversible capacity of 1071 mA h g -1 after 160 cycles with nearly 100% Coulombic efficiency at 0.2 C. The N,O dual doping treatment to porous carbon microrods paves a way toward rational design of high-performance Li-S cathodes with high energy density.

Authors


  •   Wang, Nana
  •   Xu, Zhongfei (external author)
  •   Xu, Xun
  •   Liao, Ting (external author)
  •   Tang, Bin (external author)
  •   Bai, Zhongchao (external author)
  •   Dou, Shi Xue

Publication Date


  • 2018

Citation


  • Wang, N., Xu, Z., Xu, X., Liao, T., Tang, B., Bai, Z. & Dou, S. (2018). Synergistically Enhanced Interfacial Interaction to Polysulfide via N,O Dual-Doped Highly Porous Carbon Microrods for Advanced Lithium-Sulfur Batteries. ACS Applied Materials and Interfaces, 10 (16), 13573-13580.

Scopus Eid


  • 2-s2.0-85045883180

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=4140&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3090

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 13573

End Page


  • 13580

Volume


  • 10

Issue


  • 16

Place Of Publication


  • United States