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Toward Improving the Areal Energy Density of Lithium–Sulfur Batteries with Ultramicroporous Carbon–Sulfur Composite Electrodes

M. Helen, Maximilian Fichtner, M. Anji Reddy, Anji Munnangi Orcid Logo

Energy Technology, Start page: 1900183

Swansea University Author: Anji Munnangi Orcid Logo

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DOI (Published version): 10.1002/ente.201900183

Abstract

Sulfur possesses high specific capacity (1672 mA h g−1) and high specific energy (2600 Wh kg−1), which makes it attractive as a cathode material for lithium–sulfur batteries. However, the areal energy density of sulfur electrodes is usually low due to an excess amount of inactive materials, mostly c...

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Published in: Energy Technology
ISSN: 2194-4288 2194-4296
Published: 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa51593
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first_indexed 2019-08-27T15:31:01Z
last_indexed 2019-09-03T14:52:02Z
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spelling 2019-09-03T10:34:14.0565358 v2 51593 2019-08-27 Toward Improving the Areal Energy Density of Lithium–Sulfur Batteries with Ultramicroporous Carbon–Sulfur Composite Electrodes 3ed0b4f2ff4fb9e87c7a73e7a3c39da7 0000-0001-9101-0252 Anji Munnangi Anji Munnangi true false 2019-08-27 MTLS Sulfur possesses high specific capacity (1672 mA h g−1) and high specific energy (2600 Wh kg−1), which makes it attractive as a cathode material for lithium–sulfur batteries. However, the areal energy density of sulfur electrodes is usually low due to an excess amount of inactive materials, mostly carbon, in the electrode composite. Typically, the electrode layers must be thin to achieve good specific capacity and cyclic stability. This further reduces the areal capacities, and it is challenging to design high areal density sulfur electrodes. Herein, the possibility of achieving high areal energy density by using ultramicroporous carbon–sulfur (UMC‐S) composite electrodes is investigated. For this purpose, the weight of sulfur per area is systematically varied by varying the amount of UMC‐S, and its electrochemical performance with respect to current density, cycling voltage window, electrolyte amount, and effect of temperature on cycling is investigated. A sulfur loading of up to 9.7 mg cm−2 and areal capacities above 4.5 mAh cm−2 are attained. The results indicate that a high areal energy density can be achieved with UMC‐S electrodes, however, at lower current rates. Higher current rates can be achieved by reducing the particle size and by improving the intrinsic electronic conductivity of the UMC host. Journal Article Energy Technology 1900183 2194-4288 2194-4296 6 5 2019 2019-05-06 10.1002/ente.201900183 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2019-09-03T10:34:14.0565358 2019-08-27T12:34:34.2684350 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering M. Helen 1 Maximilian Fichtner 2 M. Anji Reddy 3 Anji Munnangi 0000-0001-9101-0252 4
title Toward Improving the Areal Energy Density of Lithium–Sulfur Batteries with Ultramicroporous Carbon–Sulfur Composite Electrodes
spellingShingle Toward Improving the Areal Energy Density of Lithium–Sulfur Batteries with Ultramicroporous Carbon–Sulfur Composite Electrodes
Anji Munnangi
title_short Toward Improving the Areal Energy Density of Lithium–Sulfur Batteries with Ultramicroporous Carbon–Sulfur Composite Electrodes
title_full Toward Improving the Areal Energy Density of Lithium–Sulfur Batteries with Ultramicroporous Carbon–Sulfur Composite Electrodes
title_fullStr Toward Improving the Areal Energy Density of Lithium–Sulfur Batteries with Ultramicroporous Carbon–Sulfur Composite Electrodes
title_full_unstemmed Toward Improving the Areal Energy Density of Lithium–Sulfur Batteries with Ultramicroporous Carbon–Sulfur Composite Electrodes
title_sort Toward Improving the Areal Energy Density of Lithium–Sulfur Batteries with Ultramicroporous Carbon–Sulfur Composite Electrodes
author_id_str_mv 3ed0b4f2ff4fb9e87c7a73e7a3c39da7
author_id_fullname_str_mv 3ed0b4f2ff4fb9e87c7a73e7a3c39da7_***_Anji Munnangi
author Anji Munnangi
author2 M. Helen
Maximilian Fichtner
M. Anji Reddy
Anji Munnangi
format Journal article
container_title Energy Technology
container_start_page 1900183
publishDate 2019
institution Swansea University
issn 2194-4288
2194-4296
doi_str_mv 10.1002/ente.201900183
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 0
active_str 0
description Sulfur possesses high specific capacity (1672 mA h g−1) and high specific energy (2600 Wh kg−1), which makes it attractive as a cathode material for lithium–sulfur batteries. However, the areal energy density of sulfur electrodes is usually low due to an excess amount of inactive materials, mostly carbon, in the electrode composite. Typically, the electrode layers must be thin to achieve good specific capacity and cyclic stability. This further reduces the areal capacities, and it is challenging to design high areal density sulfur electrodes. Herein, the possibility of achieving high areal energy density by using ultramicroporous carbon–sulfur (UMC‐S) composite electrodes is investigated. For this purpose, the weight of sulfur per area is systematically varied by varying the amount of UMC‐S, and its electrochemical performance with respect to current density, cycling voltage window, electrolyte amount, and effect of temperature on cycling is investigated. A sulfur loading of up to 9.7 mg cm−2 and areal capacities above 4.5 mAh cm−2 are attained. The results indicate that a high areal energy density can be achieved with UMC‐S electrodes, however, at lower current rates. Higher current rates can be achieved by reducing the particle size and by improving the intrinsic electronic conductivity of the UMC host.
published_date 2019-05-06T04:00:51Z
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score 10.928156