Unraveling Shuttle Effect and Suppression Strategy in Lithium/Sulfur Cells by In Situ/Operando X-ray Absorption Spectroscopic Characterization

Lujie Jia, Jian Wang, Shuaiyang Ren, Guoxi Ren, Xiang Jin, Licheng Kao, Xuefei Feng, Feipeng Yang, Qi Wang, Ludi Pan, Qingtian Li, Yi sheng Liu, Yang Wu, Gao Liu, Jun Feng, Shoushan Fan, Yifan Ye, Jinghua Guo, Yuegang Zhang

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

The polysulfides shuttle effect represents a great challenge in achieving high capacity and long lifespan of lithium/sulfur (Li/S) cells. A comprehensive understanding of the shuttle-related sulfur speciation and diffusion process is vital for addressing this issue. Herein, we employed in situ/operando X-ray absorption spectroscopy (XAS) to trace the migration of polysulfides across the Li/S cells by precisely monitoring the sulfur chemical speciation at the cathodic electrolyte-separator and electrolyte-anode interfaces, respectively, in a real-time condition. After we adopted a shuttle-suppressing strategy by introducing an electrocatalytic layer of twinborn bismuth sulfide/bismuth oxide nanoclusters in a carbon matrix (BSOC), we found the Li/S cell showed greatly improved sulfur utilization and longer life span. The operando S K-edge XAS results revealed that the BSOC modification was bi-functional: trapping polysulfides and catalyzing conversion of sulfur species simultaneously. We elucidated that the polysulfide trapping-and-catalyzing effect of the BSOC electrocatalytic layer resulted in an effective lithium anode protection. Our results could offer potential stratagem for designing more advanced Li/S cells.

Original languageEnglish
Pages (from-to)222-228
Number of pages7
JournalEnergy and Environmental Materials
Volume4
Issue number2
DOIs
Publication statusPublished - 2021 Apr

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • General Materials Science
  • Water Science and Technology
  • Environmental Science (miscellaneous)
  • Waste Management and Disposal
  • Energy (miscellaneous)

Fingerprint

Dive into the research topics of 'Unraveling Shuttle Effect and Suppression Strategy in Lithium/Sulfur Cells by In Situ/Operando X-ray Absorption Spectroscopic Characterization'. Together they form a unique fingerprint.

Cite this