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Fast Ionic Diffusion-Enabled Nanoflake Electrode by Spontaneous Electrochemical Pre-Intercalation for High-Performance Supercapacitor
Layered intercalation compounds Na(x)MnO(2) (x = 0.7 and 0.91) nanoflakes have been prepared directly through wet electrochemical process with Na(+) ions intercalated into MnO(2) interlayers spontaneously. The as-prepared Na(x)MnO(2) nanoflake based supercapacitors exhibit faster ionic diffusion wit...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2013
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3634106/ http://dx.doi.org/10.1038/srep01718 |
_version_ | 1782267058980913152 |
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author | Mai, Liqiang Li, Han Zhao, Yunlong Xu, Lin Xu, Xu Luo, Yanzhu Zhang, Zhengfei Ke, Wang Niu, Chaojiang Zhang, Qingjie |
author_facet | Mai, Liqiang Li, Han Zhao, Yunlong Xu, Lin Xu, Xu Luo, Yanzhu Zhang, Zhengfei Ke, Wang Niu, Chaojiang Zhang, Qingjie |
author_sort | Mai, Liqiang |
collection | PubMed |
description | Layered intercalation compounds Na(x)MnO(2) (x = 0.7 and 0.91) nanoflakes have been prepared directly through wet electrochemical process with Na(+) ions intercalated into MnO(2) interlayers spontaneously. The as-prepared Na(x)MnO(2) nanoflake based supercapacitors exhibit faster ionic diffusion with enhanced redox peaks, tenfold-higher energy densities up to 110 Wh·kg(−1) and higher capacitances over 1000 F·g(−1) in aqueous sodium system compared with traditional MnO(2) supercapacitors. Due to the free-standing electrode structure and suitable crystal structure, Na(x)MnO(2 )nanoflake electrodes also maintain outstanding electrochemical stability with capacitance retention up to 99.9% after 1000 cycles. Besides, pre-intercalation effect is further studied to explain this enhanced electrochemical performance. This study indicates that the suitable pre-intercalation is effective to improve the diffusion of electrolyte cations and other electrochemical performance for layered oxides, and suggests that the as-obtained nanoflakes are promising materials to achieve the hybridization of both high energy and power density for advanced supercapacitors. |
format | Online Article Text |
id | pubmed-3634106 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-36341062013-04-25 Fast Ionic Diffusion-Enabled Nanoflake Electrode by Spontaneous Electrochemical Pre-Intercalation for High-Performance Supercapacitor Mai, Liqiang Li, Han Zhao, Yunlong Xu, Lin Xu, Xu Luo, Yanzhu Zhang, Zhengfei Ke, Wang Niu, Chaojiang Zhang, Qingjie Sci Rep Article Layered intercalation compounds Na(x)MnO(2) (x = 0.7 and 0.91) nanoflakes have been prepared directly through wet electrochemical process with Na(+) ions intercalated into MnO(2) interlayers spontaneously. The as-prepared Na(x)MnO(2) nanoflake based supercapacitors exhibit faster ionic diffusion with enhanced redox peaks, tenfold-higher energy densities up to 110 Wh·kg(−1) and higher capacitances over 1000 F·g(−1) in aqueous sodium system compared with traditional MnO(2) supercapacitors. Due to the free-standing electrode structure and suitable crystal structure, Na(x)MnO(2 )nanoflake electrodes also maintain outstanding electrochemical stability with capacitance retention up to 99.9% after 1000 cycles. Besides, pre-intercalation effect is further studied to explain this enhanced electrochemical performance. This study indicates that the suitable pre-intercalation is effective to improve the diffusion of electrolyte cations and other electrochemical performance for layered oxides, and suggests that the as-obtained nanoflakes are promising materials to achieve the hybridization of both high energy and power density for advanced supercapacitors. Nature Publishing Group 2013-04-24 /pmc/articles/PMC3634106/ http://dx.doi.org/10.1038/srep01718 Text en Copyright © 2013, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-nd/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/ |
spellingShingle | Article Mai, Liqiang Li, Han Zhao, Yunlong Xu, Lin Xu, Xu Luo, Yanzhu Zhang, Zhengfei Ke, Wang Niu, Chaojiang Zhang, Qingjie Fast Ionic Diffusion-Enabled Nanoflake Electrode by Spontaneous Electrochemical Pre-Intercalation for High-Performance Supercapacitor |
title | Fast Ionic Diffusion-Enabled Nanoflake Electrode by Spontaneous Electrochemical Pre-Intercalation for High-Performance Supercapacitor |
title_full | Fast Ionic Diffusion-Enabled Nanoflake Electrode by Spontaneous Electrochemical Pre-Intercalation for High-Performance Supercapacitor |
title_fullStr | Fast Ionic Diffusion-Enabled Nanoflake Electrode by Spontaneous Electrochemical Pre-Intercalation for High-Performance Supercapacitor |
title_full_unstemmed | Fast Ionic Diffusion-Enabled Nanoflake Electrode by Spontaneous Electrochemical Pre-Intercalation for High-Performance Supercapacitor |
title_short | Fast Ionic Diffusion-Enabled Nanoflake Electrode by Spontaneous Electrochemical Pre-Intercalation for High-Performance Supercapacitor |
title_sort | fast ionic diffusion-enabled nanoflake electrode by spontaneous electrochemical pre-intercalation for high-performance supercapacitor |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3634106/ http://dx.doi.org/10.1038/srep01718 |
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