RSC_Journal of Materials A

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RSC_Journal of Materials A


28 May 2022, Issue 20

Page 10795 to 11308



Geometrical engineering of a SPAN–graphene composite cathode for practical Li–S batteries



The realization of practical lithium–sulfur (Li–S) batteries is contingent on the development of innovative electrode designs having high energy, high power and a long lifespan. Herein, we propose a compact, high-performance, 2D sulfurized-polyacrylonitrile/graphene (2D-SPAN/G) cathode for practical Li–S batteries. A 2D-SPAN/G cathode with a high active-mass (sulfur) loading of 10 mg cm−2 is successfully prepared via high-pressure pelletization. In the 2D-SPAN/G cathode, graphene nanosheets function as a robust and conductive scaffold, which uniformly encapsulates SPAN nanoparticles, providing structural integrity and enabling the high electrochemical utilization of sulfur. The combination of the stabilized lithium metal anode, a modified electrolyte (consisting of 1 M LiPF6 and 0.05 M LiDFOB in EMC : FEC (3 : 1 (v/v))) and a 2D-SPAN/G cathode delivers a high areal capacity of 11 mA h cm−2 and demonstrates outstanding cycling stability over 300 cycles at a high current density of 4 mA cm−2. Moreover, the excellent electrochemical performance of a scaled-up, pouch-type Li–S battery featuring a 2D-SPAN/G cathode demonstrates the viability of the proposed cathode. The reversibility of the Li+-ion storage mechanism of the 2D-SPAN/G cathode is confirmed using operando Raman spectroscopy.



  • Hun Kim
  • Jang-Yeon Hwang
  • Sangin Bang
  • Hun-Gi Jung 
  • Yang-Kook Sun



Geometrical engineering of a SPAN–graphene composite cathode for practical Li–S batteries - Journal of Materials Chemistry A (RSC Publishing)



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