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Insight into Sulfur Confined in Ultramicroporous Carbon
M. Helen,
Thomas Diemant,
Stefan Schindler,
R. Jürgen Behm,
Michael Danzer,
Ute Kaiser,
Maximilian Fichtner,
M. Anji Reddy,
Anji Munnangi
ACS Omega, Volume: 3, Issue: 9, Pages: 11290 - 11299
Swansea University Author:
Anji Munnangi
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DOI (Published version): 10.1021/acsomega.8b01681
Abstract
Here, we provide a deeper insight into the state of sulfur confined in ultramicroporous carbon (UMC) and clarify its electrochemical reaction mechanism with lithium by corroborating the results obtained using various experimental techniques, such as X-ray photoelectron spectroscopy, electron energy...
Published in: | ACS Omega |
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ISSN: | 2470-1343 2470-1343 |
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2018
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URI: | https://cronfa.swan.ac.uk/Record/cronfa51586 |
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2019-09-03T11:48:09.1339004 v2 51586 2019-08-27 Insight into Sulfur Confined in Ultramicroporous Carbon 3ed0b4f2ff4fb9e87c7a73e7a3c39da7 0000-0001-9101-0252 Anji Munnangi Anji Munnangi true false 2019-08-27 MTLS Here, we provide a deeper insight into the state of sulfur confined in ultramicroporous carbon (UMC) and clarify its electrochemical reaction mechanism with lithium by corroborating the results obtained using various experimental techniques, such as X-ray photoelectron spectroscopy, electron energy loss spectroscopy, in situ Raman spectroscopy, and in situ electrochemical impedance spectroscopy. In combination, these results indicate that sulfur in UMC exists as linear polymeric sulfur rather than smaller allotropes. The electrochemical reactivity of lithium with sulfur confined in UMC (pore size ≤0.7 nm) is different from that of sulfur confined in microporous carbon (≤2 nm, or ultramicroporous carbon containing significant amount of micropores) and mesoporous carbon (>2 nm). The observed quasi-solid-state reaction of lithium with sulfur in UMC with a single voltage plateau during the discharge/charge process is due to the effective separation of solvent molecules from the active material. The size of carbon pores plays a vital role in determining the reaction path of lithium with sulfur confined in UMC. Journal Article ACS Omega 3 9 11290 11299 2470-1343 2470-1343 30 9 2018 2018-09-30 10.1021/acsomega.8b01681 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2019-09-03T11:48:09.1339004 2019-08-27T12:29:59.6953205 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering M. Helen 1 Thomas Diemant 2 Stefan Schindler 3 R. Jürgen Behm 4 Michael Danzer 5 Ute Kaiser 6 Maximilian Fichtner 7 M. Anji Reddy 8 Anji Munnangi 0000-0001-9101-0252 9 0051586-03092019114759.pdf helen2018.pdf 2019-09-03T11:47:59.8900000 Output 5026283 application/pdf Version of Record true 2019-09-03T00:00:00.0000000 false eng |
title |
Insight into Sulfur Confined in Ultramicroporous Carbon |
spellingShingle |
Insight into Sulfur Confined in Ultramicroporous Carbon Anji Munnangi |
title_short |
Insight into Sulfur Confined in Ultramicroporous Carbon |
title_full |
Insight into Sulfur Confined in Ultramicroporous Carbon |
title_fullStr |
Insight into Sulfur Confined in Ultramicroporous Carbon |
title_full_unstemmed |
Insight into Sulfur Confined in Ultramicroporous Carbon |
title_sort |
Insight into Sulfur Confined in Ultramicroporous Carbon |
author_id_str_mv |
3ed0b4f2ff4fb9e87c7a73e7a3c39da7 |
author_id_fullname_str_mv |
3ed0b4f2ff4fb9e87c7a73e7a3c39da7_***_Anji Munnangi |
author |
Anji Munnangi |
author2 |
M. Helen Thomas Diemant Stefan Schindler R. Jürgen Behm Michael Danzer Ute Kaiser Maximilian Fichtner M. Anji Reddy Anji Munnangi |
format |
Journal article |
container_title |
ACS Omega |
container_volume |
3 |
container_issue |
9 |
container_start_page |
11290 |
publishDate |
2018 |
institution |
Swansea University |
issn |
2470-1343 2470-1343 |
doi_str_mv |
10.1021/acsomega.8b01681 |
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Faculty of Science and Engineering |
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facultyofscienceandengineering |
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Faculty of Science and Engineering |
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facultyofscienceandengineering |
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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 |
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description |
Here, we provide a deeper insight into the state of sulfur confined in ultramicroporous carbon (UMC) and clarify its electrochemical reaction mechanism with lithium by corroborating the results obtained using various experimental techniques, such as X-ray photoelectron spectroscopy, electron energy loss spectroscopy, in situ Raman spectroscopy, and in situ electrochemical impedance spectroscopy. In combination, these results indicate that sulfur in UMC exists as linear polymeric sulfur rather than smaller allotropes. The electrochemical reactivity of lithium with sulfur confined in UMC (pore size ≤0.7 nm) is different from that of sulfur confined in microporous carbon (≤2 nm, or ultramicroporous carbon containing significant amount of micropores) and mesoporous carbon (>2 nm). The observed quasi-solid-state reaction of lithium with sulfur in UMC with a single voltage plateau during the discharge/charge process is due to the effective separation of solvent molecules from the active material. The size of carbon pores plays a vital role in determining the reaction path of lithium with sulfur confined in UMC. |
published_date |
2018-09-30T04:03:32Z |
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1763753289256534016 |
score |
11.021648 |