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High capacity cathode materials for Li-S batteries

Journal Article


Abstract


  • To enhance the stability of sulfur cathode for a high energy lithium-sulfur battery, sulfur-activated carbon (S-AC) composite was prepared by encapsulating sulfur into micropores of activated carbon using a solution-based processing technique. In the analysis using the prepared specimen of S-AC composite by the focused ion beam (FIB) technique, the elemental sulfur exists in a highly dispersed state inside the micropores of activated carbon, which has a large surface area and a narrow pore distribution. The S-AC composite was characterized through X-ray powder diffraction (XRD), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET) method, selected area electron diffraction (SAED), energy dispersive X-ray spectrometry (EDX), Fourier transform infrared spectroscopy (FT-IR), thermogravimetry analysis (TGA), and field emission scanning electron microscopy (FESEM). A lithium-sulfur cell using the S-AC composite has a high first discharge capacity over 800 mA h g -1 S even at a high current density such as 2C (3200 mA g -1 S) and has good cycleability around 500 mA h g-1 S discharge capacity at the 50th cycle at the same current density. © 2013 The Royal Society of Chemistry.

UOW Authors


  •   Wang, Guoxiu (external author)

Publication Date


  • 2013

Citation


  • Ryu, H. S., Park, J. W., Park, J., Ahn, J. P., Kim, K. W., Ahn, J. H., . . . Ahn, H. J. (2013). High capacity cathode materials for Li-S batteries. Journal of Materials Chemistry A, 1(5), 1573-1578. doi:10.1039/c2ta00056c

Scopus Eid


  • 2-s2.0-84874975326

Start Page


  • 1573

End Page


  • 1578

Volume


  • 1

Issue


  • 5

Abstract


  • To enhance the stability of sulfur cathode for a high energy lithium-sulfur battery, sulfur-activated carbon (S-AC) composite was prepared by encapsulating sulfur into micropores of activated carbon using a solution-based processing technique. In the analysis using the prepared specimen of S-AC composite by the focused ion beam (FIB) technique, the elemental sulfur exists in a highly dispersed state inside the micropores of activated carbon, which has a large surface area and a narrow pore distribution. The S-AC composite was characterized through X-ray powder diffraction (XRD), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET) method, selected area electron diffraction (SAED), energy dispersive X-ray spectrometry (EDX), Fourier transform infrared spectroscopy (FT-IR), thermogravimetry analysis (TGA), and field emission scanning electron microscopy (FESEM). A lithium-sulfur cell using the S-AC composite has a high first discharge capacity over 800 mA h g -1 S even at a high current density such as 2C (3200 mA g -1 S) and has good cycleability around 500 mA h g-1 S discharge capacity at the 50th cycle at the same current density. © 2013 The Royal Society of Chemistry.

UOW Authors


  •   Wang, Guoxiu (external author)

Publication Date


  • 2013

Citation


  • Ryu, H. S., Park, J. W., Park, J., Ahn, J. P., Kim, K. W., Ahn, J. H., . . . Ahn, H. J. (2013). High capacity cathode materials for Li-S batteries. Journal of Materials Chemistry A, 1(5), 1573-1578. doi:10.1039/c2ta00056c

Scopus Eid


  • 2-s2.0-84874975326

Start Page


  • 1573

End Page


  • 1578

Volume


  • 1

Issue


  • 5