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Novel Sulfur/Ethylenediamine-Functionalized Reduced Graphene Oxide Composite as Cathode Material for High-performance Lithium-Sulfur Batteries

Sulfur/ethylenediamine-functionalized reduced graphene oxide (S/EDA-RGO) nanocomposites were synthesized using a simple process. Ethylenediamine (EDA) was employed as both the reducing agent and the modification component. The morphologies, microstructures, and compositions of S/EDA-RGO composites w...

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Autores principales: Chen, Zhuo, Sun, Zhenghao, Zhang, Yongguang, Tan, Taizhe, Tian, Yuan, Chen, Zhihong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5977317/
https://www.ncbi.nlm.nih.gov/pubmed/29734767
http://dx.doi.org/10.3390/nano8050303
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author Chen, Zhuo
Sun, Zhenghao
Zhang, Yongguang
Tan, Taizhe
Tian, Yuan
Chen, Zhihong
author_facet Chen, Zhuo
Sun, Zhenghao
Zhang, Yongguang
Tan, Taizhe
Tian, Yuan
Chen, Zhihong
author_sort Chen, Zhuo
collection PubMed
description Sulfur/ethylenediamine-functionalized reduced graphene oxide (S/EDA-RGO) nanocomposites were synthesized using a simple process. Ethylenediamine (EDA) was employed as both the reducing agent and the modification component. The morphologies, microstructures, and compositions of S/EDA-RGO composites were characterized by various detection techniques. The data indicated that EDA-RGO used as scaffolds for sulfur cathodes could enhance the electronic conductivity of the composites and strengthen the adsorbability of polysulfides. Meanwhile, the electrochemical properties of both S/EDA-RGO and S/RGO composites that were used as cathodes for lithium-sulfur (Li-S) batteries were investigated. The initial discharge capacity of S/EDA-RGO composites reached 1240 mAh g(−1), with reversible capacity being maintained at 714 mAh g(−1) after 100 cycles. The improvement in cycling stability of S/EDA-RGO composites was further verified at different current rates. These findings demonstrated that proper surface modification of RGO by EDA reducing agent might improve the electrochemical performances of Li–S batteries.
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spelling pubmed-59773172018-06-05 Novel Sulfur/Ethylenediamine-Functionalized Reduced Graphene Oxide Composite as Cathode Material for High-performance Lithium-Sulfur Batteries Chen, Zhuo Sun, Zhenghao Zhang, Yongguang Tan, Taizhe Tian, Yuan Chen, Zhihong Nanomaterials (Basel) Article Sulfur/ethylenediamine-functionalized reduced graphene oxide (S/EDA-RGO) nanocomposites were synthesized using a simple process. Ethylenediamine (EDA) was employed as both the reducing agent and the modification component. The morphologies, microstructures, and compositions of S/EDA-RGO composites were characterized by various detection techniques. The data indicated that EDA-RGO used as scaffolds for sulfur cathodes could enhance the electronic conductivity of the composites and strengthen the adsorbability of polysulfides. Meanwhile, the electrochemical properties of both S/EDA-RGO and S/RGO composites that were used as cathodes for lithium-sulfur (Li-S) batteries were investigated. The initial discharge capacity of S/EDA-RGO composites reached 1240 mAh g(−1), with reversible capacity being maintained at 714 mAh g(−1) after 100 cycles. The improvement in cycling stability of S/EDA-RGO composites was further verified at different current rates. These findings demonstrated that proper surface modification of RGO by EDA reducing agent might improve the electrochemical performances of Li–S batteries. MDPI 2018-05-06 /pmc/articles/PMC5977317/ /pubmed/29734767 http://dx.doi.org/10.3390/nano8050303 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Chen, Zhuo
Sun, Zhenghao
Zhang, Yongguang
Tan, Taizhe
Tian, Yuan
Chen, Zhihong
Novel Sulfur/Ethylenediamine-Functionalized Reduced Graphene Oxide Composite as Cathode Material for High-performance Lithium-Sulfur Batteries
title Novel Sulfur/Ethylenediamine-Functionalized Reduced Graphene Oxide Composite as Cathode Material for High-performance Lithium-Sulfur Batteries
title_full Novel Sulfur/Ethylenediamine-Functionalized Reduced Graphene Oxide Composite as Cathode Material for High-performance Lithium-Sulfur Batteries
title_fullStr Novel Sulfur/Ethylenediamine-Functionalized Reduced Graphene Oxide Composite as Cathode Material for High-performance Lithium-Sulfur Batteries
title_full_unstemmed Novel Sulfur/Ethylenediamine-Functionalized Reduced Graphene Oxide Composite as Cathode Material for High-performance Lithium-Sulfur Batteries
title_short Novel Sulfur/Ethylenediamine-Functionalized Reduced Graphene Oxide Composite as Cathode Material for High-performance Lithium-Sulfur Batteries
title_sort novel sulfur/ethylenediamine-functionalized reduced graphene oxide composite as cathode material for high-performance lithium-sulfur batteries
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5977317/
https://www.ncbi.nlm.nih.gov/pubmed/29734767
http://dx.doi.org/10.3390/nano8050303
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