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Title: Reduction mechanism of sulfur in lithium-sulfur battery: From elemental sulfur to polysulfide

Journal Article · · Journal of Power Sources
 [1];  [2];  [3];  [4];  [2];  [1]
  1. Univ. of Wisconsin, Milwaukee, WI (United States)
  2. Wuhan Univ. of Technology, Wuhan (People's Republic of China)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
  4. Xidian Univ., Shanxi (People's Republic of China)

In this study, the polysulfide ions formed during the first reduction wave of sulfur in Li–S battery were determined through both in-situ and ex-situ derivatization of polysulfides. By comparing the cyclic voltammetric results with and without the derivatization reagent (methyl triflate) as well as the in-situ and ex-situ derivatization results under potentiostatic condition, in-situ derivatization was found to be more appropriate than its ex-situ counterpart, since subsequent fast chemical reactions between the polysulfides and sulfur may occur during the timeframe of ex-situ procedures. It was found that the major polysulfide ions formed at the first reduction wave of elemental sulfur were the S42– and S52– species, while the widely accepted reduction products of S82– and S62– for the first reduction wave were in low abundance.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
SC00112704
OSTI ID:
1235890
Report Number(s):
BNL-111743-2016-JA; R&D Project: MA453MAEA; VT1201000
Journal Information:
Journal of Power Sources, Vol. 301, Issue C; ISSN 0378-7753
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 77 works
Citation information provided by
Web of Science

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Sulfur Hosts against the Shuttle Effect journal April 2018
Reduced graphene oxide@CoSe2 interlayer as anchor of polysulfides for high properties of lithium–sulfur battery journal April 2019
Polysulfide Stabilization: A Pivotal Strategy to Achieve High Energy Density Li-S Batteries with Long Cycle Life journal December 2017
Chemical Confinement and Utility of Lithium Polysulfides in Lithium Sulfur Batteries journal April 2019
High Lithium Ion Conductivity LiF/GO Solid Electrolyte Interphase Inhibiting the Shuttle of Lithium Polysulfides in Long-Life Li-S Batteries journal January 2018
Separator Modification and Functionalization for Inhibiting the Shuttle Effect in Lithium-Sulfur Batteries journal July 2018
Advanced Characterization Techniques in Promoting Mechanism Understanding for Lithium-Sulfur Batteries journal March 2018
The phase transfer effect of sulfur in lithium–sulfur batteries journal January 2019
Differences in Electrochemistry between Fibrous SPAN and Fibrous S/C Cathodes Relevant to Cycle Stability and Capacity journal June 2017
The Progress of Li-S Batteries-Understanding of the Sulfur Redox Mechanism: Dissolved Polysulfide Ions in the Electrolytes journal June 2018
Mesoporous carbon prepared by etching halloysite nanotubes (HNTs) with pyrrole as a precursor for a sulfur carrier of superior lithium–sulfur batteries journal January 2019
Polar and Nonpolar Matrix Consisting of Twined Multiwalled Carbon Nanotube and High Nitrogen‐Doped Porous Carbon Derived from Ionic Liquid for Stable Li‐S Battery journal May 2019