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Hierarchical VOOH hollow spheres for symmetrical and asymmetrical supercapacitor devices
Hierarchical VOOH hollow spheres with low crystallinity composed of nanoparticles were prepared by a facile and template-free method, which involved a precipitation of precursor microspheres in aqueous solution at room temperature and subsequent hydrothermal reaction. Quasi-solid-state symmetric and...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society Publishing
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5792947/ https://www.ncbi.nlm.nih.gov/pubmed/29410870 http://dx.doi.org/10.1098/rsos.171768 |
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author | Jing, Xuyang Wang, Cong Feng, Wenjing Xing, Na Jiang, Hanmei Lu, Xiangyu Zhang, Yifu Meng, Changgong |
author_facet | Jing, Xuyang Wang, Cong Feng, Wenjing Xing, Na Jiang, Hanmei Lu, Xiangyu Zhang, Yifu Meng, Changgong |
author_sort | Jing, Xuyang |
collection | PubMed |
description | Hierarchical VOOH hollow spheres with low crystallinity composed of nanoparticles were prepared by a facile and template-free method, which involved a precipitation of precursor microspheres in aqueous solution at room temperature and subsequent hydrothermal reaction. Quasi-solid-state symmetric and asymmetric supercapacitor (SSC and ASC) devices were fabricated using hierarchical VOOH hollow spheres as the electrodes, and the electrochemical properties of the VOOH//VOOH SSC device and the VOOH//AC ASC device were studied by cyclic voltammetry (CV), galvanostatic charge–discharge (GCD) and electrochemical impedance spectroscopy (EIS). Results demonstrated that the electrochemical performance of the VOOH//AC ASC device was better than that of the VOOH//VOOH SSC device. After 3000 cycles, the specific capacitance of the VOOH//AC ASC device retains 83% of the initial capacitance, while the VOOH//VOOH SSC device retains only 7.7%. Findings in this work proved that hierarchical VOOH hollow spheres could be a promising candidate as an ideal electrode material for supercapacitor devices. |
format | Online Article Text |
id | pubmed-5792947 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | The Royal Society Publishing |
record_format | MEDLINE/PubMed |
spelling | pubmed-57929472018-02-06 Hierarchical VOOH hollow spheres for symmetrical and asymmetrical supercapacitor devices Jing, Xuyang Wang, Cong Feng, Wenjing Xing, Na Jiang, Hanmei Lu, Xiangyu Zhang, Yifu Meng, Changgong R Soc Open Sci Chemistry Hierarchical VOOH hollow spheres with low crystallinity composed of nanoparticles were prepared by a facile and template-free method, which involved a precipitation of precursor microspheres in aqueous solution at room temperature and subsequent hydrothermal reaction. Quasi-solid-state symmetric and asymmetric supercapacitor (SSC and ASC) devices were fabricated using hierarchical VOOH hollow spheres as the electrodes, and the electrochemical properties of the VOOH//VOOH SSC device and the VOOH//AC ASC device were studied by cyclic voltammetry (CV), galvanostatic charge–discharge (GCD) and electrochemical impedance spectroscopy (EIS). Results demonstrated that the electrochemical performance of the VOOH//AC ASC device was better than that of the VOOH//VOOH SSC device. After 3000 cycles, the specific capacitance of the VOOH//AC ASC device retains 83% of the initial capacitance, while the VOOH//VOOH SSC device retains only 7.7%. Findings in this work proved that hierarchical VOOH hollow spheres could be a promising candidate as an ideal electrode material for supercapacitor devices. The Royal Society Publishing 2018-01-31 /pmc/articles/PMC5792947/ /pubmed/29410870 http://dx.doi.org/10.1098/rsos.171768 Text en © 2018 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. |
spellingShingle | Chemistry Jing, Xuyang Wang, Cong Feng, Wenjing Xing, Na Jiang, Hanmei Lu, Xiangyu Zhang, Yifu Meng, Changgong Hierarchical VOOH hollow spheres for symmetrical and asymmetrical supercapacitor devices |
title | Hierarchical VOOH hollow spheres for symmetrical and asymmetrical supercapacitor devices |
title_full | Hierarchical VOOH hollow spheres for symmetrical and asymmetrical supercapacitor devices |
title_fullStr | Hierarchical VOOH hollow spheres for symmetrical and asymmetrical supercapacitor devices |
title_full_unstemmed | Hierarchical VOOH hollow spheres for symmetrical and asymmetrical supercapacitor devices |
title_short | Hierarchical VOOH hollow spheres for symmetrical and asymmetrical supercapacitor devices |
title_sort | hierarchical vooh hollow spheres for symmetrical and asymmetrical supercapacitor devices |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5792947/ https://www.ncbi.nlm.nih.gov/pubmed/29410870 http://dx.doi.org/10.1098/rsos.171768 |
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