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Suppressed Shuttle via Inhibiting the Formation of Long-Chain Lithium Polysulfides and Functional Separator for Greatly Improved Lithium–Organosulfur Batteries Performance

Journal Article


Abstract


  • The development of lithium–sulfur batteries is limited by the poor conductivity of sulfur cathodes and soluble long-chain lithium polysulfides (LPSs), which cause the low utilization of sulfur and the aversive shuttle effect, and further, give rise to self-discharge, rapid reversible capacity fading, and low Coulombic efficiency. In this work, a novel configuration is built for high-performance lithium–organosulfur batteries, in which the organosulfur hybrid material and lithium metal are used as the cathode and the anode, respectively, and are separated by a functional separator decorated with nitrogen and sulfur co-doped reduced graphite oxide. The organosulfur in the cathode prevents the shuttle effect by inhibiting the formation of long-chain LPSs. In addition, the functional separator effectively adsorbs LPSs escaping from the cathode by electrostatic interactions and further restrains the shuttle effect. These effects are confirmed by density-functional theory calculations. As a result, this novel configuration provides a high initial discharge capacity of 1364 mAh g−1 at 0.2 C and a high discharge capacity of 750 mAh g−1 at 1 C after 700 cycles with a very low capacity decay rate of 0.037% per cycle.

Authors


  •   Li, Huan (external author)
  •   Zhou, Yitong (external author)
  •   Zhao, Ming (external author)
  •   Jin, Bo (external author)
  •   Wen, Zi (external author)
  •   Xie, Haiming (external author)
  •   Dou, Shi Xue
  •   Jiang, Qing (external author)

Publication Date


  • 2019

Citation


  • Li, H., Zhou, Y., Zhao, M., Jin, B., Wen, Z., Xie, H., Dou, S. & Jiang, Q. (2019). Suppressed Shuttle via Inhibiting the Formation of Long-Chain Lithium Polysulfides and Functional Separator for Greatly Improved Lithium–Organosulfur Batteries Performance. Advanced Energy Materials, Online First 1902695-1-1902695-11.

Scopus Eid


  • 2-s2.0-85075726131

Start Page


  • 1902695-1

End Page


  • 1902695-11

Volume


  • Online First

Place Of Publication


  • Germany

Abstract


  • The development of lithium–sulfur batteries is limited by the poor conductivity of sulfur cathodes and soluble long-chain lithium polysulfides (LPSs), which cause the low utilization of sulfur and the aversive shuttle effect, and further, give rise to self-discharge, rapid reversible capacity fading, and low Coulombic efficiency. In this work, a novel configuration is built for high-performance lithium–organosulfur batteries, in which the organosulfur hybrid material and lithium metal are used as the cathode and the anode, respectively, and are separated by a functional separator decorated with nitrogen and sulfur co-doped reduced graphite oxide. The organosulfur in the cathode prevents the shuttle effect by inhibiting the formation of long-chain LPSs. In addition, the functional separator effectively adsorbs LPSs escaping from the cathode by electrostatic interactions and further restrains the shuttle effect. These effects are confirmed by density-functional theory calculations. As a result, this novel configuration provides a high initial discharge capacity of 1364 mAh g−1 at 0.2 C and a high discharge capacity of 750 mAh g−1 at 1 C after 700 cycles with a very low capacity decay rate of 0.037% per cycle.

Authors


  •   Li, Huan (external author)
  •   Zhou, Yitong (external author)
  •   Zhao, Ming (external author)
  •   Jin, Bo (external author)
  •   Wen, Zi (external author)
  •   Xie, Haiming (external author)
  •   Dou, Shi Xue
  •   Jiang, Qing (external author)

Publication Date


  • 2019

Citation


  • Li, H., Zhou, Y., Zhao, M., Jin, B., Wen, Z., Xie, H., Dou, S. & Jiang, Q. (2019). Suppressed Shuttle via Inhibiting the Formation of Long-Chain Lithium Polysulfides and Functional Separator for Greatly Improved Lithium–Organosulfur Batteries Performance. Advanced Energy Materials, Online First 1902695-1-1902695-11.

Scopus Eid


  • 2-s2.0-85075726131

Start Page


  • 1902695-1

End Page


  • 1902695-11

Volume


  • Online First

Place Of Publication


  • Germany