Enhancement of lithium-sulfur batteries’ performance with spinel CuFe2O4 and MnFe2O4 additives

Lithium-sulfur battery is explored due to its high theoretical energy density of 2500 W h kg-1 and sulfur’s high theoretical specific capacity of 1675 mA h g-1. However, one of the reasons for not commercializing lithium-sulfur batteries is because of the dissolution of polysulfide intermediates. Di...

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Main Author: Low, Han Rou
Other Authors: XU Zhichuan, Jason
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2020
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Online Access:https://hdl.handle.net/10356/138507
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spelling sg-ntu-dr.10356-1385072023-03-04T15:44:15Z Enhancement of lithium-sulfur batteries’ performance with spinel CuFe2O4 and MnFe2O4 additives Low, Han Rou XU Zhichuan, Jason School of Materials Science and Engineering xuzc@ntu.edu.sg Engineering::Materials Lithium-sulfur battery is explored due to its high theoretical energy density of 2500 W h kg-1 and sulfur’s high theoretical specific capacity of 1675 mA h g-1. However, one of the reasons for not commercializing lithium-sulfur batteries is because of the dissolution of polysulfide intermediates. Dissolution of polysulfides results in the loss of the active materials – sulfur. In order to trap the polysulfides, in this experiment, two spinel ferrites, copper ferrites (CuFe2O4) and manganese ferrites (MnFe2O4) are mixed with sulfur and carbon in the cathodes to adsorb the active materials. Static Polysulfide Adsorption Test has been done and the test has shown that MnFe2O4 has a higher adsorption capability for Li2S6 as compared to CuFe2O4. 7 samples (Control, Cu-3, Cu-5, Cu-10, Mn-3, Mn-5 and Mn-10) are produced with 60wt% of sulfur loading in the cathodes. From battery testing, samples with 3wt% of MnFe2O4 additives and 3wt% of CuFe2O4 additives in the cathodes showed a higher initial specific capacity of 1067 mA h g-1 and 900 mA h g-1 as compared to the Control with an initial specific capacity of 706 mA h g-1. Among the 7 samples, cell with 5wt% of MnFe2O4 has registered the highest specific capacity of 653 mA h g-1 after 200 charge-discharge cycles at 0.5C while cell with 5wt% of CuFe2O4 additives has demonstrated the lowest capacity decay per cycle of 0.1194% after 200 charge-discharge cycles at 0.5C. Bachelor of Engineering (Materials Engineering) 2020-05-07T10:47:28Z 2020-05-07T10:47:28Z 2020 Final Year Project (FYP) https://hdl.handle.net/10356/138507 en application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Materials
spellingShingle Engineering::Materials
Low, Han Rou
Enhancement of lithium-sulfur batteries’ performance with spinel CuFe2O4 and MnFe2O4 additives
description Lithium-sulfur battery is explored due to its high theoretical energy density of 2500 W h kg-1 and sulfur’s high theoretical specific capacity of 1675 mA h g-1. However, one of the reasons for not commercializing lithium-sulfur batteries is because of the dissolution of polysulfide intermediates. Dissolution of polysulfides results in the loss of the active materials – sulfur. In order to trap the polysulfides, in this experiment, two spinel ferrites, copper ferrites (CuFe2O4) and manganese ferrites (MnFe2O4) are mixed with sulfur and carbon in the cathodes to adsorb the active materials. Static Polysulfide Adsorption Test has been done and the test has shown that MnFe2O4 has a higher adsorption capability for Li2S6 as compared to CuFe2O4. 7 samples (Control, Cu-3, Cu-5, Cu-10, Mn-3, Mn-5 and Mn-10) are produced with 60wt% of sulfur loading in the cathodes. From battery testing, samples with 3wt% of MnFe2O4 additives and 3wt% of CuFe2O4 additives in the cathodes showed a higher initial specific capacity of 1067 mA h g-1 and 900 mA h g-1 as compared to the Control with an initial specific capacity of 706 mA h g-1. Among the 7 samples, cell with 5wt% of MnFe2O4 has registered the highest specific capacity of 653 mA h g-1 after 200 charge-discharge cycles at 0.5C while cell with 5wt% of CuFe2O4 additives has demonstrated the lowest capacity decay per cycle of 0.1194% after 200 charge-discharge cycles at 0.5C.
author2 XU Zhichuan, Jason
author_facet XU Zhichuan, Jason
Low, Han Rou
format Final Year Project
author Low, Han Rou
author_sort Low, Han Rou
title Enhancement of lithium-sulfur batteries’ performance with spinel CuFe2O4 and MnFe2O4 additives
title_short Enhancement of lithium-sulfur batteries’ performance with spinel CuFe2O4 and MnFe2O4 additives
title_full Enhancement of lithium-sulfur batteries’ performance with spinel CuFe2O4 and MnFe2O4 additives
title_fullStr Enhancement of lithium-sulfur batteries’ performance with spinel CuFe2O4 and MnFe2O4 additives
title_full_unstemmed Enhancement of lithium-sulfur batteries’ performance with spinel CuFe2O4 and MnFe2O4 additives
title_sort enhancement of lithium-sulfur batteries’ performance with spinel cufe2o4 and mnfe2o4 additives
publisher Nanyang Technological University
publishDate 2020
url https://hdl.handle.net/10356/138507
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