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Polysulfides Formation in Different Electrolytes from the Perspective of X-ray Absorption Spectroscopy

Robert Dominko, Alen Vizintin, Guiliana Aquilanti, Lorenzo Stievano, Maria Joseph Helen, Anji Munnangi Orcid Logo, Maximilian Fichtner, Iztok Arcon

Journal of The Electrochemical Society, Volume: 165, Issue: 1, Pages: A5014 - A5019

Swansea University Author: Anji Munnangi Orcid Logo

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DOI (Published version): 10.1149/2.0151801jes

Abstract

Li-S batteries are promising energy storage technology for the future, however there two major problems remained which need to be solved before successful commercialization. Capacity fading due to polysulfide shuttle and corrosion of lithium metal are directly connected with the type and quantity of...

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Published in: Journal of The Electrochemical Society
ISSN: 0013-4651 1945-7111
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa51572
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spelling 2019-09-03T11:55:17.6337631 v2 51572 2019-08-27 Polysulfides Formation in Different Electrolytes from the Perspective of X-ray Absorption Spectroscopy 3ed0b4f2ff4fb9e87c7a73e7a3c39da7 0000-0001-9101-0252 Anji Munnangi Anji Munnangi true false 2019-08-27 MTLS Li-S batteries are promising energy storage technology for the future, however there two major problems remained which need to be solved before successful commercialization. Capacity fading due to polysulfide shuttle and corrosion of lithium metal are directly connected with the type and quantity of electrolyte used in the cells. Several recent works show dependence of the electrochemical behavior of Li-S batteries on type of the electrolyte. In this work we compare and discuss a discharge mechanism of sulfur conversion in three different electrolytes based on measurements with sulfur K-edge XAS. The sulfur conversion mechanism in the ether based electrolytes, the most studied type of solvents in the Li-S batteries, which are enabling high solubility of polysulfides are compared with the fluorinated ether based electrolytes with a reduced polysulfide solubility and in carbonate based electrolytes with the sulfur confined into a ultramicroporous carbon. In all three cases the sulfur reduction proceeds through polysulfide intermediate phases with a difference on the type polysulfides detected at different steps of discharge. Journal Article Journal of The Electrochemical Society 165 1 A5014 A5019 0013-4651 1945-7111 electrolyte, Li-S batteries, XAS 31 12 2018 2018-12-31 10.1149/2.0151801jes COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2019-09-03T11:55:17.6337631 2019-08-27T12:18:42.5522000 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Robert Dominko 1 Alen Vizintin 2 Guiliana Aquilanti 3 Lorenzo Stievano 4 Maria Joseph Helen 5 Anji Munnangi 0000-0001-9101-0252 6 Maximilian Fichtner 7 Iztok Arcon 8 0051572-03092019115509.pdf dominiko2018.pdf 2019-09-03T11:55:09.8200000 Output 589547 application/pdf Version of Record true 2019-09-03T00:00:00.0000000 false eng
title Polysulfides Formation in Different Electrolytes from the Perspective of X-ray Absorption Spectroscopy
spellingShingle Polysulfides Formation in Different Electrolytes from the Perspective of X-ray Absorption Spectroscopy
Anji Munnangi
title_short Polysulfides Formation in Different Electrolytes from the Perspective of X-ray Absorption Spectroscopy
title_full Polysulfides Formation in Different Electrolytes from the Perspective of X-ray Absorption Spectroscopy
title_fullStr Polysulfides Formation in Different Electrolytes from the Perspective of X-ray Absorption Spectroscopy
title_full_unstemmed Polysulfides Formation in Different Electrolytes from the Perspective of X-ray Absorption Spectroscopy
title_sort Polysulfides Formation in Different Electrolytes from the Perspective of X-ray Absorption Spectroscopy
author_id_str_mv 3ed0b4f2ff4fb9e87c7a73e7a3c39da7
author_id_fullname_str_mv 3ed0b4f2ff4fb9e87c7a73e7a3c39da7_***_Anji Munnangi
author Anji Munnangi
author2 Robert Dominko
Alen Vizintin
Guiliana Aquilanti
Lorenzo Stievano
Maria Joseph Helen
Anji Munnangi
Maximilian Fichtner
Iztok Arcon
format Journal article
container_title Journal of The Electrochemical Society
container_volume 165
container_issue 1
container_start_page A5014
publishDate 2018
institution Swansea University
issn 0013-4651
1945-7111
doi_str_mv 10.1149/2.0151801jes
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering
document_store_str 1
active_str 0
description Li-S batteries are promising energy storage technology for the future, however there two major problems remained which need to be solved before successful commercialization. Capacity fading due to polysulfide shuttle and corrosion of lithium metal are directly connected with the type and quantity of electrolyte used in the cells. Several recent works show dependence of the electrochemical behavior of Li-S batteries on type of the electrolyte. In this work we compare and discuss a discharge mechanism of sulfur conversion in three different electrolytes based on measurements with sulfur K-edge XAS. The sulfur conversion mechanism in the ether based electrolytes, the most studied type of solvents in the Li-S batteries, which are enabling high solubility of polysulfides are compared with the fluorinated ether based electrolytes with a reduced polysulfide solubility and in carbonate based electrolytes with the sulfur confined into a ultramicroporous carbon. In all three cases the sulfur reduction proceeds through polysulfide intermediate phases with a difference on the type polysulfides detected at different steps of discharge.
published_date 2018-12-31T04:03:30Z
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score 11.016235

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