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Hierarchical, porous CuS microspheres integrated with carbon nanotubes for high-performance supercapacitors

Carbon nanotubes (CNTs) incorporated porous 3-dimensional (3D) CuS microspheres have been successfully synthesized via a simple refluxing method assisted by PVP. The composites are composed of flower-shaped CuS secondary microspheres, which in turn are assembled with primary nanosheets of 15–30 nm i...

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Autores principales: Lu, Yang, Liu, Xianming, Wang, Weixiao, Cheng, Jinbing, Yan, Hailong, Tang, Chengchun, Kim, Jang-Kyo, Luo, Yongsong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4645118/
https://www.ncbi.nlm.nih.gov/pubmed/26568518
http://dx.doi.org/10.1038/srep16584
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author Lu, Yang
Liu, Xianming
Wang, Weixiao
Cheng, Jinbing
Yan, Hailong
Tang, Chengchun
Kim, Jang-Kyo
Luo, Yongsong
author_facet Lu, Yang
Liu, Xianming
Wang, Weixiao
Cheng, Jinbing
Yan, Hailong
Tang, Chengchun
Kim, Jang-Kyo
Luo, Yongsong
author_sort Lu, Yang
collection PubMed
description Carbon nanotubes (CNTs) incorporated porous 3-dimensional (3D) CuS microspheres have been successfully synthesized via a simple refluxing method assisted by PVP. The composites are composed of flower-shaped CuS secondary microspheres, which in turn are assembled with primary nanosheets of 15–30 nm in thickness and fully integrated with CNT. The composites possess a large specific surface area of 189.6 m(2) g(−1) and a high conductivity of 0.471 S cm(−1). As electrode materials for supercapacitors, the nanocomposites show excellent cyclability and rate capability and deliver an average reversible capacitance as high as 1960 F g(−1) at a current density of 10 mA cm(−2) over 10000 cycles. The high electrochemical performance can be attributed to the synergistic effect of CNTs and the unique microstructure of CuS. The CNTs serve as not only a conductive agent to accelerate the transfer of electrons in the composites, but also as a buffer matrix to restrain the volume change and stabilize the electrode structure during the charge/discharge process. The porous structure of CuS also helps to stabilize the electrode structure and facilitates the transport for electrons.
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spelling pubmed-46451182015-11-20 Hierarchical, porous CuS microspheres integrated with carbon nanotubes for high-performance supercapacitors Lu, Yang Liu, Xianming Wang, Weixiao Cheng, Jinbing Yan, Hailong Tang, Chengchun Kim, Jang-Kyo Luo, Yongsong Sci Rep Article Carbon nanotubes (CNTs) incorporated porous 3-dimensional (3D) CuS microspheres have been successfully synthesized via a simple refluxing method assisted by PVP. The composites are composed of flower-shaped CuS secondary microspheres, which in turn are assembled with primary nanosheets of 15–30 nm in thickness and fully integrated with CNT. The composites possess a large specific surface area of 189.6 m(2) g(−1) and a high conductivity of 0.471 S cm(−1). As electrode materials for supercapacitors, the nanocomposites show excellent cyclability and rate capability and deliver an average reversible capacitance as high as 1960 F g(−1) at a current density of 10 mA cm(−2) over 10000 cycles. The high electrochemical performance can be attributed to the synergistic effect of CNTs and the unique microstructure of CuS. The CNTs serve as not only a conductive agent to accelerate the transfer of electrons in the composites, but also as a buffer matrix to restrain the volume change and stabilize the electrode structure during the charge/discharge process. The porous structure of CuS also helps to stabilize the electrode structure and facilitates the transport for electrons. Nature Publishing Group 2015-11-16 /pmc/articles/PMC4645118/ /pubmed/26568518 http://dx.doi.org/10.1038/srep16584 Text en Copyright © 2015, Macmillan Publishers Limited 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
Lu, Yang
Liu, Xianming
Wang, Weixiao
Cheng, Jinbing
Yan, Hailong
Tang, Chengchun
Kim, Jang-Kyo
Luo, Yongsong
Hierarchical, porous CuS microspheres integrated with carbon nanotubes for high-performance supercapacitors
title Hierarchical, porous CuS microspheres integrated with carbon nanotubes for high-performance supercapacitors
title_full Hierarchical, porous CuS microspheres integrated with carbon nanotubes for high-performance supercapacitors
title_fullStr Hierarchical, porous CuS microspheres integrated with carbon nanotubes for high-performance supercapacitors
title_full_unstemmed Hierarchical, porous CuS microspheres integrated with carbon nanotubes for high-performance supercapacitors
title_short Hierarchical, porous CuS microspheres integrated with carbon nanotubes for high-performance supercapacitors
title_sort hierarchical, porous cus microspheres integrated with carbon nanotubes for high-performance supercapacitors
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4645118/
https://www.ncbi.nlm.nih.gov/pubmed/26568518
http://dx.doi.org/10.1038/srep16584
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