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Perspective on ultramicroporous carbon as sulphur host for Li–S batteries

Helen Maria Joseph Orcid Logo, Maximilian Fichtner, Anji Munnangi Orcid Logo

Journal of Energy Chemistry, Volume: 59, Pages: 242 - 256

Swansea University Authors: Helen Maria Joseph Orcid Logo, Anji Munnangi Orcid Logo

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DOI (Published version): 10.1016/j.jechem.2020.11.001

Abstract

Lithium-sulphur (Li-S) batteries are currently considered as next-generation battery technology. Sulphur is an attractive positive electrode for lithium metal batteries, mainly due to its high capacity (1675 mAh g-1) and high specific energy (2600 Wh kg-1). The electrochemical reaction of lithium wi...

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Published in: Journal of Energy Chemistry
ISSN: 2095-4956
Published: Elsevier BV 2021
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URI: https://cronfa.swan.ac.uk/Record/cronfa55645
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spelling 2020-12-30T13:52:18.8812119 v2 55645 2020-11-11 Perspective on ultramicroporous carbon as sulphur host for Li–S batteries 14b38b35d68f119e7c197338c21f4461 0000-0002-8739-3147 Helen Maria Joseph Helen Maria Joseph true false 3ed0b4f2ff4fb9e87c7a73e7a3c39da7 0000-0001-9101-0252 Anji Munnangi Anji Munnangi true false 2020-11-11 AERO Lithium-sulphur (Li-S) batteries are currently considered as next-generation battery technology. Sulphur is an attractive positive electrode for lithium metal batteries, mainly due to its high capacity (1675 mAh g-1) and high specific energy (2600 Wh kg-1). The electrochemical reaction of lithium with sulphur in non-aqueous electrolytes results in the formation of electrolyte soluble intermediate lithium-polysulphides. The dissolved polysulphides shuttle to the anode and get reduced at the anode resulting in Li metal corrosion. The solubility of polysulphide gradually reduces the amount of sulphur in the cathode, thereby limiting the cycle life of Li-S batteries. Several strategies have been proposed to improve the cycling stability of Li-S batteries. A unique approach to eliminate the polysulphide shuttle is to use ultramicroporous carbon (UMC) as a host for sulphur. The pore size of UMC which is below 7 Å, is the bottleneck for carbonate solvents to access sulphur/polysulphides confined in the pores, thereby preventing the polysulphide dissolution. This perspective article will emphasise the role of UMC host in directing the lithiation mechanism of sulphur and in inhibiting polysulphide dissolution, including the resulting parasitic reaction on the lithium anode. Further, the challenges that need to be addressed by UMC-S based Li-S batteries, and the strategies to realise high power density, high Coulombic efficiency, and resilient Li-S batteries will be discussed. Journal Article Journal of Energy Chemistry 59 242 256 Elsevier BV 2095-4956 Lithium-sulphur batteries, Ultramicroporous carbon, Sulphur, Cathode, Composites 1 8 2021 2021-08-01 10.1016/j.jechem.2020.11.001 COLLEGE NANME Aerospace Engineering COLLEGE CODE AERO Swansea University 2020-12-30T13:52:18.8812119 2020-11-11T12:09:00.2786648 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Helen Maria Joseph 0000-0002-8739-3147 1 Maximilian Fichtner 2 Anji Munnangi 0000-0001-9101-0252 3 55645__18643__8e3d7ce7f34f4af3b453ca140a75156d.pdf 55645.pdf 2020-11-11T12:11:42.1731657 Output 2809475 application/pdf Accepted Manuscript true 2021-11-09T00:00:00.0000000 © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license true eng http://creativecommons.org/licenses/by-nc-nd/4.0/
title Perspective on ultramicroporous carbon as sulphur host for Li–S batteries
spellingShingle Perspective on ultramicroporous carbon as sulphur host for Li–S batteries
Helen Maria Joseph
Anji Munnangi
title_short Perspective on ultramicroporous carbon as sulphur host for Li–S batteries
title_full Perspective on ultramicroporous carbon as sulphur host for Li–S batteries
title_fullStr Perspective on ultramicroporous carbon as sulphur host for Li–S batteries
title_full_unstemmed Perspective on ultramicroporous carbon as sulphur host for Li–S batteries
title_sort Perspective on ultramicroporous carbon as sulphur host for Li–S batteries
author_id_str_mv 14b38b35d68f119e7c197338c21f4461
3ed0b4f2ff4fb9e87c7a73e7a3c39da7
author_id_fullname_str_mv 14b38b35d68f119e7c197338c21f4461_***_Helen Maria Joseph
3ed0b4f2ff4fb9e87c7a73e7a3c39da7_***_Anji Munnangi
author Helen Maria Joseph
Anji Munnangi
author2 Helen Maria Joseph
Maximilian Fichtner
Anji Munnangi
format Journal article
container_title Journal of Energy Chemistry
container_volume 59
container_start_page 242
publishDate 2021
institution Swansea University
issn 2095-4956
doi_str_mv 10.1016/j.jechem.2020.11.001
publisher Elsevier BV
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 Lithium-sulphur (Li-S) batteries are currently considered as next-generation battery technology. Sulphur is an attractive positive electrode for lithium metal batteries, mainly due to its high capacity (1675 mAh g-1) and high specific energy (2600 Wh kg-1). The electrochemical reaction of lithium with sulphur in non-aqueous electrolytes results in the formation of electrolyte soluble intermediate lithium-polysulphides. The dissolved polysulphides shuttle to the anode and get reduced at the anode resulting in Li metal corrosion. The solubility of polysulphide gradually reduces the amount of sulphur in the cathode, thereby limiting the cycle life of Li-S batteries. Several strategies have been proposed to improve the cycling stability of Li-S batteries. A unique approach to eliminate the polysulphide shuttle is to use ultramicroporous carbon (UMC) as a host for sulphur. The pore size of UMC which is below 7 Å, is the bottleneck for carbonate solvents to access sulphur/polysulphides confined in the pores, thereby preventing the polysulphide dissolution. This perspective article will emphasise the role of UMC host in directing the lithiation mechanism of sulphur and in inhibiting polysulphide dissolution, including the resulting parasitic reaction on the lithium anode. Further, the challenges that need to be addressed by UMC-S based Li-S batteries, and the strategies to realise high power density, high Coulombic efficiency, and resilient Li-S batteries will be discussed.
published_date 2021-08-01T04:10:01Z
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