New developments in lithium sulfur batteries

Rui Xu, Ilias Belharouak, Xiaofeng Zhang, Bryant Polzin, James C M Li

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

In this work, efforts were conducted in order to mitigate the issue of polysulfides dissolution and hence to improve the capacity and efficiency of Li-sulfur cells. The first approach was achieved by optimizing the amount of sulfur that can be contained in the sulfur/carbon electrode. Five sulfur/carbon ratios were prepared- (1) 50/50, (2) 60/40, (3) 70/30, (4) 80/20, and (5) 90/10- to study the effect of carbon contents on electrochemical cycling. The second approach was by adding nano-sized TiO2 particles having a large specific surface area as the polysulfide adsorbing agent in the electrodes. The impact of nano-sized TiO2 particles in improving the electrochemical properties of sulfur electrodes was investigated using CV measurements and charge/discharge tests. To further enhance the efficiency and cycling stability of Li-S batteries, a novel polysulfide electrolyte was developed. This new electrolyte mainly consisted of pre-dissolved lithium polysulfides (Li2Sx) as an alternative electrolyte salt to replace the lithium bis(trifluoromethanesulfone)imide (LiTFSI). We also used LiNO3 to mitigate the shuttle mechanism that occurs in Li-S cells during the charge and discharge. By creating a dynamic equilibrium at the interface of the cathode and electrolyte, the dissolution of lithium polysulfides, and thus the loss of active materials from the cathode during the discharge and charge of the cell, was greatly prevented.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume8728
DOIs
Publication statusPublished - 12 Aug 2013
Externally publishedYes
EventEnergy Harvesting and Storage: Materials, Devices, and Applications IV - Baltimore, MD, United States
Duration: 29 Apr 20131 May 2013

Other

OtherEnergy Harvesting and Storage: Materials, Devices, and Applications IV
CountryUnited States
CityBaltimore, MD
Period29/4/131/5/13

Fingerprint

lithium sulfur batteries
polysulfides
Polysulfides
Electrolyte
Sulfur
Battery
sulfur
Electrolytes
Electrode
Carbon
Lithium
TiO2
electrolytes
Dissolution
Charge
Cycling
lithium
Cell
Electrodes
electrodes

Keywords

  • Coulombic efficiency
  • Energy density
  • Lithium polysulfide
  • Lithium-sulfur (Li-S) batteries
  • Shuttle effect

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Xu, R., Belharouak, I., Zhang, X., Polzin, B., & Li, J. C. M. (2013). New developments in lithium sulfur batteries. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 8728). [872804] https://doi.org/10.1117/12.2016110

New developments in lithium sulfur batteries. / Xu, Rui; Belharouak, Ilias; Zhang, Xiaofeng; Polzin, Bryant; Li, James C M.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8728 2013. 872804.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Xu, R, Belharouak, I, Zhang, X, Polzin, B & Li, JCM 2013, New developments in lithium sulfur batteries. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 8728, 872804, Energy Harvesting and Storage: Materials, Devices, and Applications IV, Baltimore, MD, United States, 29/4/13. https://doi.org/10.1117/12.2016110
Xu R, Belharouak I, Zhang X, Polzin B, Li JCM. New developments in lithium sulfur batteries. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8728. 2013. 872804 https://doi.org/10.1117/12.2016110
Xu, Rui ; Belharouak, Ilias ; Zhang, Xiaofeng ; Polzin, Bryant ; Li, James C M. / New developments in lithium sulfur batteries. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8728 2013.
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