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Simultaneous Electrodeposition of Ternary Metal Oxide Nanocomposites for High-Efficiency Supercapacitor Applications
[Image: see text] Complex oxides and hydroxides of Ni, Co, and Mn from a precursor mixture were electrochemically deposited on both a cathode and an anode. On the Ni foam cathode, the complex metal hydroxides precipitated as nanolayers at −0.9 V. Simultaneously, the metal ions were oxidized and depo...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2022
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9134227/ https://www.ncbi.nlm.nih.gov/pubmed/35647438 http://dx.doi.org/10.1021/acsomega.2c00826 |
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author | Abebe, Eshetu Mekonnen Ujihara, Masaki |
author_facet | Abebe, Eshetu Mekonnen Ujihara, Masaki |
author_sort | Abebe, Eshetu Mekonnen |
collection | PubMed |
description | [Image: see text] Complex oxides and hydroxides of Ni, Co, and Mn from a precursor mixture were electrochemically deposited on both a cathode and an anode. On the Ni foam cathode, the complex metal hydroxides precipitated as nanolayers at −0.9 V. Simultaneously, the metal ions were oxidized and deposited as blocks on the Ni foam anode. While the concentrations of Ni(NO(3))(2) and Mn(NO(3))(2) were constant (80 mM for Ni(2+) and 40 mM for Mn(2+), respectively), the concentration of Co(NO(3))(2) was varied from 20 to 120 mM, which affected the morphology and electrochemical properties of the electrode: a Co:Ni:Mn molar ratio resulted in the highest specific capacitance (at a scan rate of 5 mV s(–1), 1800 F g(–1) for the cathode material and 720 F g(–1) for the anode material). This cathode material was assembled into symmetric supercapacitors, which demonstrated an excellent energy density of 39 Wh kg(–1) at a power density of 1300 W kg(–1) and a high capacitance retention of 90% after 3000 charge/discharge cycles. This high electrochemical performance was attributed to the optimized ratio of metal oxides, and this simple preparation strategy can be applied to other nanocomposites of complex metal oxides/hydroxides with desired characteristics for various applications. |
format | Online Article Text |
id | pubmed-9134227 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-91342272022-05-27 Simultaneous Electrodeposition of Ternary Metal Oxide Nanocomposites for High-Efficiency Supercapacitor Applications Abebe, Eshetu Mekonnen Ujihara, Masaki ACS Omega [Image: see text] Complex oxides and hydroxides of Ni, Co, and Mn from a precursor mixture were electrochemically deposited on both a cathode and an anode. On the Ni foam cathode, the complex metal hydroxides precipitated as nanolayers at −0.9 V. Simultaneously, the metal ions were oxidized and deposited as blocks on the Ni foam anode. While the concentrations of Ni(NO(3))(2) and Mn(NO(3))(2) were constant (80 mM for Ni(2+) and 40 mM for Mn(2+), respectively), the concentration of Co(NO(3))(2) was varied from 20 to 120 mM, which affected the morphology and electrochemical properties of the electrode: a Co:Ni:Mn molar ratio resulted in the highest specific capacitance (at a scan rate of 5 mV s(–1), 1800 F g(–1) for the cathode material and 720 F g(–1) for the anode material). This cathode material was assembled into symmetric supercapacitors, which demonstrated an excellent energy density of 39 Wh kg(–1) at a power density of 1300 W kg(–1) and a high capacitance retention of 90% after 3000 charge/discharge cycles. This high electrochemical performance was attributed to the optimized ratio of metal oxides, and this simple preparation strategy can be applied to other nanocomposites of complex metal oxides/hydroxides with desired characteristics for various applications. American Chemical Society 2022-05-14 /pmc/articles/PMC9134227/ /pubmed/35647438 http://dx.doi.org/10.1021/acsomega.2c00826 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Abebe, Eshetu Mekonnen Ujihara, Masaki Simultaneous Electrodeposition of Ternary Metal Oxide Nanocomposites for High-Efficiency Supercapacitor Applications |
title | Simultaneous Electrodeposition of Ternary Metal Oxide
Nanocomposites for High-Efficiency Supercapacitor Applications |
title_full | Simultaneous Electrodeposition of Ternary Metal Oxide
Nanocomposites for High-Efficiency Supercapacitor Applications |
title_fullStr | Simultaneous Electrodeposition of Ternary Metal Oxide
Nanocomposites for High-Efficiency Supercapacitor Applications |
title_full_unstemmed | Simultaneous Electrodeposition of Ternary Metal Oxide
Nanocomposites for High-Efficiency Supercapacitor Applications |
title_short | Simultaneous Electrodeposition of Ternary Metal Oxide
Nanocomposites for High-Efficiency Supercapacitor Applications |
title_sort | simultaneous electrodeposition of ternary metal oxide
nanocomposites for high-efficiency supercapacitor applications |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9134227/ https://www.ncbi.nlm.nih.gov/pubmed/35647438 http://dx.doi.org/10.1021/acsomega.2c00826 |
work_keys_str_mv | AT abebeeshetumekonnen simultaneouselectrodepositionofternarymetaloxidenanocompositesforhighefficiencysupercapacitorapplications AT ujiharamasaki simultaneouselectrodepositionofternarymetaloxidenanocompositesforhighefficiencysupercapacitorapplications |