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Sulfur-graphene nanostructured cathodes via ball-milling for high-performance lithium-sulfur batteries

Journal Article


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Abstract


  • Although much progress has been made to develop high-performance lithium-sulfur batteries (LSBs), the reported physical or chemical routes to sulfur cathode materials are often multistep/complex and even involve environmentally hazardous reagents, and hence are infeasible for mass production. Here, we report a simple ball-milling technique to combine both the physical and chemical routes into a one-step process for low-cost, scalable, and eco-friendly production of graphene nanoplatelets (GnPs) edge-functionalized with sulfur (S-GnPs) as highly efficient LSB cathode materials of practical significance. LSBs based on the S-GnP cathode materials, produced by ball-milling 70 wt % sulfur and 30 wt % graphite, delivered a high initial reversible capacity of 1265.3 mAh g-1 at 0.1 C in the voltage range of 1.5-3.0 V with an excellent rate capability, followed by a high reversible capacity of 966.1 mAh g-1 at 2 C with a low capacity decay rate of 0.099% per cycle over 500 cycles, outperformed the current state-of-the-art cathode materials for LSBs. The observed excellent electrochemical performance can be attributed to a 3D "sandwich-like" structure of S-GnPs with an enhanced ionic conductivity and lithium insertion/extraction capacity during the discharge-charge process. Furthermore, a low-cost porous carbon paper pyrolyzed from common filter paper was inserted between the 0.7S-0.3GnP electrode and porous polypropylene film separator to reduce/eliminate the dissolution of physically adsorbed polysulfide into the electrolyte and subsequent cross-deposition on the anode, leading to further improved capacity and cycling stability.

Authors


  •   Xu, Jiantie
  •   Shui, Jianglan (external author)
  •   Wang, Jian Li.
  •   Wang, Min (external author)
  •   Liu, Hua K.
  •   Dou, Shi Xue
  •   Jeon, In-Yup (external author)
  •   Seo, Jeong-Min (external author)
  •   Baek, Jong-Beom (external author)
  •   Dai, Liming (external author)

Publication Date


  • 2014

Citation


  • Xu, J., Shui, J., Wang, J., Wang, M., Liu, H., Dou, S. Xue., Jeon, I., Seo, J., Baek, J. & Dai, L. (2014). Sulfur-graphene nanostructured cathodes via ball-milling for high-performance lithium-sulfur batteries. ACS Nano, 8 (10), 10920-10930.

Scopus Eid


  • 2-s2.0-84908452486

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2271&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1270

Number Of Pages


  • 10

Start Page


  • 10920

End Page


  • 10930

Volume


  • 8

Issue


  • 10

Abstract


  • Although much progress has been made to develop high-performance lithium-sulfur batteries (LSBs), the reported physical or chemical routes to sulfur cathode materials are often multistep/complex and even involve environmentally hazardous reagents, and hence are infeasible for mass production. Here, we report a simple ball-milling technique to combine both the physical and chemical routes into a one-step process for low-cost, scalable, and eco-friendly production of graphene nanoplatelets (GnPs) edge-functionalized with sulfur (S-GnPs) as highly efficient LSB cathode materials of practical significance. LSBs based on the S-GnP cathode materials, produced by ball-milling 70 wt % sulfur and 30 wt % graphite, delivered a high initial reversible capacity of 1265.3 mAh g-1 at 0.1 C in the voltage range of 1.5-3.0 V with an excellent rate capability, followed by a high reversible capacity of 966.1 mAh g-1 at 2 C with a low capacity decay rate of 0.099% per cycle over 500 cycles, outperformed the current state-of-the-art cathode materials for LSBs. The observed excellent electrochemical performance can be attributed to a 3D "sandwich-like" structure of S-GnPs with an enhanced ionic conductivity and lithium insertion/extraction capacity during the discharge-charge process. Furthermore, a low-cost porous carbon paper pyrolyzed from common filter paper was inserted between the 0.7S-0.3GnP electrode and porous polypropylene film separator to reduce/eliminate the dissolution of physically adsorbed polysulfide into the electrolyte and subsequent cross-deposition on the anode, leading to further improved capacity and cycling stability.

Authors


  •   Xu, Jiantie
  •   Shui, Jianglan (external author)
  •   Wang, Jian Li.
  •   Wang, Min (external author)
  •   Liu, Hua K.
  •   Dou, Shi Xue
  •   Jeon, In-Yup (external author)
  •   Seo, Jeong-Min (external author)
  •   Baek, Jong-Beom (external author)
  •   Dai, Liming (external author)

Publication Date


  • 2014

Citation


  • Xu, J., Shui, J., Wang, J., Wang, M., Liu, H., Dou, S. Xue., Jeon, I., Seo, J., Baek, J. & Dai, L. (2014). Sulfur-graphene nanostructured cathodes via ball-milling for high-performance lithium-sulfur batteries. ACS Nano, 8 (10), 10920-10930.

Scopus Eid


  • 2-s2.0-84908452486

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2271&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1270

Number Of Pages


  • 10

Start Page


  • 10920

End Page


  • 10930

Volume


  • 8

Issue


  • 10