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Amorphous nickel hydroxide nanospheres with ultrahigh capacitance and energy density as electrochemical pseudocapacitor materials

Among numerous active electrode materials, nickel hydroxide is a promising electrode in electrochemical capacitors. Nickel hydroxide research has thus far focused on the crystalline rather than the amorphous phase, despite the impressive electrochemical properties of the latter, which includes an im...

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Autores principales: Li, H. B., Yu, M. H., Wang, F. X., Liu, P., Liang, Y., Xiao, J., Wang, C. X., Tong, Y. X., Yang, G. W.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Pub. Group 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3674274/
https://www.ncbi.nlm.nih.gov/pubmed/23695688
http://dx.doi.org/10.1038/ncomms2932
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author Li, H. B.
Yu, M. H.
Wang, F. X.
Liu, P.
Liang, Y.
Xiao, J.
Wang, C. X.
Tong, Y. X.
Yang, G. W.
author_facet Li, H. B.
Yu, M. H.
Wang, F. X.
Liu, P.
Liang, Y.
Xiao, J.
Wang, C. X.
Tong, Y. X.
Yang, G. W.
author_sort Li, H. B.
collection PubMed
description Among numerous active electrode materials, nickel hydroxide is a promising electrode in electrochemical capacitors. Nickel hydroxide research has thus far focused on the crystalline rather than the amorphous phase, despite the impressive electrochemical properties of the latter, which includes an improved electrochemical efficiency due to disorder. Here we demonstrate high-performance electrochemical supercapacitors prepared from amorphous nickel hydroxide nanospheres synthesized via simple, green electrochemistry. The amorphous nickel hydroxide electrode exhibits high capacitance (2,188 F g(−1)), and the asymmetric pseudocapacitors of the amorphous nickel hydroxide exhibit high capacitance (153 F g(−1)), high energy density (35.7 W h kg(−1) at a power density of 490 W kg(−1)) and super-long cycle life (97% and 81% charge retentions after 5,000 and 10,000 cycles, respectively). The integrated electrochemical performance of the amorphous nickel hydroxide is commensurate with crystalline materials in supercapacitors. These findings promote the application of amorphous nanostructures as advanced electrochemical pseudocapacitor materials.
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spelling pubmed-36742742013-06-06 Amorphous nickel hydroxide nanospheres with ultrahigh capacitance and energy density as electrochemical pseudocapacitor materials Li, H. B. Yu, M. H. Wang, F. X. Liu, P. Liang, Y. Xiao, J. Wang, C. X. Tong, Y. X. Yang, G. W. Nat Commun Article Among numerous active electrode materials, nickel hydroxide is a promising electrode in electrochemical capacitors. Nickel hydroxide research has thus far focused on the crystalline rather than the amorphous phase, despite the impressive electrochemical properties of the latter, which includes an improved electrochemical efficiency due to disorder. Here we demonstrate high-performance electrochemical supercapacitors prepared from amorphous nickel hydroxide nanospheres synthesized via simple, green electrochemistry. The amorphous nickel hydroxide electrode exhibits high capacitance (2,188 F g(−1)), and the asymmetric pseudocapacitors of the amorphous nickel hydroxide exhibit high capacitance (153 F g(−1)), high energy density (35.7 W h kg(−1) at a power density of 490 W kg(−1)) and super-long cycle life (97% and 81% charge retentions after 5,000 and 10,000 cycles, respectively). The integrated electrochemical performance of the amorphous nickel hydroxide is commensurate with crystalline materials in supercapacitors. These findings promote the application of amorphous nanostructures as advanced electrochemical pseudocapacitor materials. Nature Pub. Group 2013-05-21 /pmc/articles/PMC3674274/ /pubmed/23695688 http://dx.doi.org/10.1038/ncomms2932 Text en Copyright © 2013, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by-nc-sa/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/
spellingShingle Article
Li, H. B.
Yu, M. H.
Wang, F. X.
Liu, P.
Liang, Y.
Xiao, J.
Wang, C. X.
Tong, Y. X.
Yang, G. W.
Amorphous nickel hydroxide nanospheres with ultrahigh capacitance and energy density as electrochemical pseudocapacitor materials
title Amorphous nickel hydroxide nanospheres with ultrahigh capacitance and energy density as electrochemical pseudocapacitor materials
title_full Amorphous nickel hydroxide nanospheres with ultrahigh capacitance and energy density as electrochemical pseudocapacitor materials
title_fullStr Amorphous nickel hydroxide nanospheres with ultrahigh capacitance and energy density as electrochemical pseudocapacitor materials
title_full_unstemmed Amorphous nickel hydroxide nanospheres with ultrahigh capacitance and energy density as electrochemical pseudocapacitor materials
title_short Amorphous nickel hydroxide nanospheres with ultrahigh capacitance and energy density as electrochemical pseudocapacitor materials
title_sort amorphous nickel hydroxide nanospheres with ultrahigh capacitance and energy density as electrochemical pseudocapacitor materials
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3674274/
https://www.ncbi.nlm.nih.gov/pubmed/23695688
http://dx.doi.org/10.1038/ncomms2932
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