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Supercritical Carbon Dioxide-Assisted Process for Well-Dispersed Silicon/Graphene Composite as a Li ion Battery Anode

The silicon (Si)/graphene composite has been touted as one of the most promising anode materials for lithium ion batteries. However, the optimal fabrication method for this composite remains a challenge. Here, we developed a novel method using supercritical carbon dioxide (scCO(2)) to intercalate Si...

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Autores principales: Lee, Sang Ha, Park, Sengyoen, Kim, Min, Yoon, Dohyeon, Chanthad, Chalathorn, Cho, Misuk, Kim, Jaehoon, Park, Jong Hyeok, Lee, Youngkwan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4989224/
https://www.ncbi.nlm.nih.gov/pubmed/27535108
http://dx.doi.org/10.1038/srep32011
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author Lee, Sang Ha
Park, Sengyoen
Kim, Min
Yoon, Dohyeon
Chanthad, Chalathorn
Cho, Misuk
Kim, Jaehoon
Park, Jong Hyeok
Lee, Youngkwan
author_facet Lee, Sang Ha
Park, Sengyoen
Kim, Min
Yoon, Dohyeon
Chanthad, Chalathorn
Cho, Misuk
Kim, Jaehoon
Park, Jong Hyeok
Lee, Youngkwan
author_sort Lee, Sang Ha
collection PubMed
description The silicon (Si)/graphene composite has been touted as one of the most promising anode materials for lithium ion batteries. However, the optimal fabrication method for this composite remains a challenge. Here, we developed a novel method using supercritical carbon dioxide (scCO(2)) to intercalate Si nanoparticles into graphene nanosheets. Silicon was modified with a thin layer of polyaniline, which assisted the dispersion of graphene sheets by introducing π-π interaction. Using scCO(2), well-dispersed Si/graphene composite was successfully obtained in a short time under mild temperature. The composite showed high cycle performance (1,789 mAh/g after 250 cycles) and rate capability (1,690 mAh/g at a current density of 4,000 mA/g). This study provides a new approach for cost-effective and scalable preparation of a Si/graphene composite using scCO(2) for a highly stable lithium battery anode material.
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spelling pubmed-49892242016-08-30 Supercritical Carbon Dioxide-Assisted Process for Well-Dispersed Silicon/Graphene Composite as a Li ion Battery Anode Lee, Sang Ha Park, Sengyoen Kim, Min Yoon, Dohyeon Chanthad, Chalathorn Cho, Misuk Kim, Jaehoon Park, Jong Hyeok Lee, Youngkwan Sci Rep Article The silicon (Si)/graphene composite has been touted as one of the most promising anode materials for lithium ion batteries. However, the optimal fabrication method for this composite remains a challenge. Here, we developed a novel method using supercritical carbon dioxide (scCO(2)) to intercalate Si nanoparticles into graphene nanosheets. Silicon was modified with a thin layer of polyaniline, which assisted the dispersion of graphene sheets by introducing π-π interaction. Using scCO(2), well-dispersed Si/graphene composite was successfully obtained in a short time under mild temperature. The composite showed high cycle performance (1,789 mAh/g after 250 cycles) and rate capability (1,690 mAh/g at a current density of 4,000 mA/g). This study provides a new approach for cost-effective and scalable preparation of a Si/graphene composite using scCO(2) for a highly stable lithium battery anode material. Nature Publishing Group 2016-08-18 /pmc/articles/PMC4989224/ /pubmed/27535108 http://dx.doi.org/10.1038/srep32011 Text en Copyright © 2016, The Author(s) 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 to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Lee, Sang Ha
Park, Sengyoen
Kim, Min
Yoon, Dohyeon
Chanthad, Chalathorn
Cho, Misuk
Kim, Jaehoon
Park, Jong Hyeok
Lee, Youngkwan
Supercritical Carbon Dioxide-Assisted Process for Well-Dispersed Silicon/Graphene Composite as a Li ion Battery Anode
title Supercritical Carbon Dioxide-Assisted Process for Well-Dispersed Silicon/Graphene Composite as a Li ion Battery Anode
title_full Supercritical Carbon Dioxide-Assisted Process for Well-Dispersed Silicon/Graphene Composite as a Li ion Battery Anode
title_fullStr Supercritical Carbon Dioxide-Assisted Process for Well-Dispersed Silicon/Graphene Composite as a Li ion Battery Anode
title_full_unstemmed Supercritical Carbon Dioxide-Assisted Process for Well-Dispersed Silicon/Graphene Composite as a Li ion Battery Anode
title_short Supercritical Carbon Dioxide-Assisted Process for Well-Dispersed Silicon/Graphene Composite as a Li ion Battery Anode
title_sort supercritical carbon dioxide-assisted process for well-dispersed silicon/graphene composite as a li ion battery anode
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4989224/
https://www.ncbi.nlm.nih.gov/pubmed/27535108
http://dx.doi.org/10.1038/srep32011
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