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Encapsulation of S/SWNT with PANI Web for Enhanced Rate and Cycle Performance in Lithium Sulfur Batteries

Lithium-sulfur batteries show great potential to compete with lithium-ion batteries due to the fact that sulfur can deliver a high theoretical capacity of 1672 mAh/g and a high theoretical energy density of 2500 Wh/kg. But it has several problems to be solved in order to achieve high sulfur utilizat...

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Autores principales: Kim, Joo Hyun, Fu, Kun, Choi, Junghyun, Kil, Kichun, Kim, Jeonghyun, Han, Xiaogang, Hu, Liangbing, Paik, Ungyu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4354035/
https://www.ncbi.nlm.nih.gov/pubmed/25752298
http://dx.doi.org/10.1038/srep08946
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author Kim, Joo Hyun
Fu, Kun
Choi, Junghyun
Kil, Kichun
Kim, Jeonghyun
Han, Xiaogang
Hu, Liangbing
Paik, Ungyu
author_facet Kim, Joo Hyun
Fu, Kun
Choi, Junghyun
Kil, Kichun
Kim, Jeonghyun
Han, Xiaogang
Hu, Liangbing
Paik, Ungyu
author_sort Kim, Joo Hyun
collection PubMed
description Lithium-sulfur batteries show great potential to compete with lithium-ion batteries due to the fact that sulfur can deliver a high theoretical capacity of 1672 mAh/g and a high theoretical energy density of 2500 Wh/kg. But it has several problems to be solved in order to achieve high sulfur utilization with high Coulombic efficiency and long cycle life of Li-S batteries. These problems are mainly caused by the dissoluble polysulfide species, which are a series of complex reduced sulfur products, associating with shuttle effect between electrodes as well as side reactions on lithium metal anode. To alleviate these challenges, we developed a sulfur-carbon nanotube (S/SWNT) composite coated with polyaniline (PANI) polymer as polysulfide block to achieve high sulfur utilization, high Coulombic efficiency, and long cycle life. The PANI coated S/SWNT composite showed a superior specific capacity of 1011 mAh/g over 100 cycles and a good rate retention, demonstrating the synergic contribution of porous carbon and conducting polymer protection to address challenges underlying sulfur cathode.
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spelling pubmed-43540352015-03-17 Encapsulation of S/SWNT with PANI Web for Enhanced Rate and Cycle Performance in Lithium Sulfur Batteries Kim, Joo Hyun Fu, Kun Choi, Junghyun Kil, Kichun Kim, Jeonghyun Han, Xiaogang Hu, Liangbing Paik, Ungyu Sci Rep Article Lithium-sulfur batteries show great potential to compete with lithium-ion batteries due to the fact that sulfur can deliver a high theoretical capacity of 1672 mAh/g and a high theoretical energy density of 2500 Wh/kg. But it has several problems to be solved in order to achieve high sulfur utilization with high Coulombic efficiency and long cycle life of Li-S batteries. These problems are mainly caused by the dissoluble polysulfide species, which are a series of complex reduced sulfur products, associating with shuttle effect between electrodes as well as side reactions on lithium metal anode. To alleviate these challenges, we developed a sulfur-carbon nanotube (S/SWNT) composite coated with polyaniline (PANI) polymer as polysulfide block to achieve high sulfur utilization, high Coulombic efficiency, and long cycle life. The PANI coated S/SWNT composite showed a superior specific capacity of 1011 mAh/g over 100 cycles and a good rate retention, demonstrating the synergic contribution of porous carbon and conducting polymer protection to address challenges underlying sulfur cathode. Nature Publishing Group 2015-03-10 /pmc/articles/PMC4354035/ /pubmed/25752298 http://dx.doi.org/10.1038/srep08946 Text en Copyright © 2015, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Kim, Joo Hyun
Fu, Kun
Choi, Junghyun
Kil, Kichun
Kim, Jeonghyun
Han, Xiaogang
Hu, Liangbing
Paik, Ungyu
Encapsulation of S/SWNT with PANI Web for Enhanced Rate and Cycle Performance in Lithium Sulfur Batteries
title Encapsulation of S/SWNT with PANI Web for Enhanced Rate and Cycle Performance in Lithium Sulfur Batteries
title_full Encapsulation of S/SWNT with PANI Web for Enhanced Rate and Cycle Performance in Lithium Sulfur Batteries
title_fullStr Encapsulation of S/SWNT with PANI Web for Enhanced Rate and Cycle Performance in Lithium Sulfur Batteries
title_full_unstemmed Encapsulation of S/SWNT with PANI Web for Enhanced Rate and Cycle Performance in Lithium Sulfur Batteries
title_short Encapsulation of S/SWNT with PANI Web for Enhanced Rate and Cycle Performance in Lithium Sulfur Batteries
title_sort encapsulation of s/swnt with pani web for enhanced rate and cycle performance in lithium sulfur batteries
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4354035/
https://www.ncbi.nlm.nih.gov/pubmed/25752298
http://dx.doi.org/10.1038/srep08946
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