Reduction mechanism of sulfur in lithium-sulfur battery: From elemental sulfur to polysulfide
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 S 4 2– and S 5 2– species, while the widely accepted reduction products of S 8 2– and S 6 2– for the first reduction wave were in low abundance.
- Authors:
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[1]
; [2]
; [3]
; [4]
; [2]
; [1]
- Univ. of Wisconsin, Milwaukee, WI (United States)
- Wuhan Univ. of Technology, Wuhan (People's Republic of China)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Xidian Univ., Shanxi (People's Republic of China)
- Publication Date:
- Report Number(s):
- BNL-111743-2016-JA
Journal ID: ISSN 0378-7753; R&D Project: MA453MAEA; VT1201000
- Grant/Contract Number:
- SC00112704
- Type:
- Accepted Manuscript
- Journal Name:
- Journal of Power Sources
- Additional Journal Information:
- Journal Volume: 301; Journal Issue: C; Journal ID: ISSN 0378-7753
- Publisher:
- Elsevier
- Research Org:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; reduction of sulfur; Lithium–sulfur battery; polysulfide; HPLC
- OSTI Identifier:
- 1235890
- Free Publicly Accessible Full Text
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Accepted Manuscript (DOE)
- Publisher's Version of Record
- https://doi.org/10.1016/j.jpowsour.2015.10.002