Shuttle-effect-free sodium–sulfur batteries derived from a Tröger's base polymer of intrinsic microporosity

Jun Woo Jeon, Dong Min Kim, Jinyoung Lee, Min Su Kim, Min Ho Jeon, Richard Malpass-Evans, Neil B. McKeown, Kyu Tae Lee, Byoung Gak Kim*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Room-temperature sodium–sulfur (RT Na–S) batteries have recently gained attention as next-generation energy storage devices owing to their low cost, the abundance of sodium, and the high theoretical capacity of sulfur. However, the notorious shuttle effect, caused by the dissolution of intermediate polysulfides during cycling, limits the long-term performance of Na–S batteries. In this study, intrinsically microporous Tröger's base based polymer (PIM-EA-TB)-based carbon–sulfur composites are prepared for shuttle-effect-free RT Na–S batteries by utilizing the combination of physical confinement and covalent bonding in a single material. The composites demonstrate excellent electrochemical performance, including a negligible capacity fading over 350 cycles and a high coulombic efficiency of approximately greater than 99%.

Original languageEnglish
Article number230539
JournalJournal of Power Sources
Volume513
Early online date25 Sep 2021
DOIs
Publication statusE-pub ahead of print - 25 Sep 2021

Keywords

  • Carbon–sulfur composite
  • Na–S batteries
  • Polymer of intrinsic microporosity
  • Shuttle effect free batteries
  • Tröger's base

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