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Title: Chemisorption of polysulfides through redox reactions with organic molecules for lithium–sulfur batteries

Lithium-sulfur battery possesses high energy density but suffers from severe capacity fading due to the dissolution of lithium polysulfides. Novel design and mechanisms to encapsulate lithium polysulfides are greatly desired by high-performance lithium-sulfur batteries towards practical applications. Herein, we report a strategy of utilizing anthraquinone, a natural abundant organic molecule, to suppress dissolution and diffusion of polysulfides species through redox reactions during cycling. The keto groups of anthraquinone play a critical role in forming strong Lewis acid-based chemical bonding. This mechanism leads to a long cycling stability of sulfur-based electrodes. With a high sulfur content of ~73%, a low capacity decay of 0.019% per cycle for 300 cycles and retention of 81.7% over 500 cycles at 0.5 C rate can be achieved. Here, this finding and understanding paves an alternative avenue for the future design of sulfur-based cathodes toward the practical application of lithium-sulfur batteries.
Authors:
 [1] ;  [2] ; ORCiD logo [3] ;  [4] ;  [5] ;  [5] ;  [5] ;  [4] ;  [6] ; ORCiD logo [5] ;  [4]
  1. Wenzhou Univ., Zhejiang (China); Univ. of Waterloo, Waterloo, ON (Canada)
  2. Univ. of Waterloo, Waterloo, ON (Canada); Concordia Univ., Montreal, QC (Canada)
  3. Univ. of Waterloo, Waterloo, ON (Canada); Korea Institute of Energy Research, Jellabuk-do (Republic of Korea)
  4. Univ. of Waterloo, Waterloo, ON (Canada)
  5. Argonne National Lab. (ANL), Argonne, IL (United States)
  6. Wenzhou Univ., Zhejiang (China)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
Natural Sciences and Engineering Research Council of Canada (NSERC); Wenzhou University; University of Waterloo; Concordia University, Montreal; National Natural Science Foundation of China (NNSFC); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE
OSTI Identifier:
1466377