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 S42– and S52– species, while the widely accepted reduction products of S82– and S62– 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