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2D Hierarchical NiMoO(4) Nanosheets/Activated Carbon Nanocomposites for High Performance Supercapacitors: The Effect of Nickel to Molybdenum Ratios

Supercapacitors have the potential to be used in a variety of fields, including electric vehicles, and a lot of research is focused on unique electrode materials to enhance capacitance and stability. Herein, we prepared nickel molybdate/activated carbon (AC) nanocomposites using a facile impregnatio...

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Detalles Bibliográficos
Autores principales: Hamdi, Esraa, Abdelwahab, Abdalla, Farghali, Ahmed A., Rouby, Waleed M. A. El, Carrasco-Marín, Francisco
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9921724/
https://www.ncbi.nlm.nih.gov/pubmed/36770269
http://dx.doi.org/10.3390/ma16031264
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author Hamdi, Esraa
Abdelwahab, Abdalla
Farghali, Ahmed A.
Rouby, Waleed M. A. El
Carrasco-Marín, Francisco
author_facet Hamdi, Esraa
Abdelwahab, Abdalla
Farghali, Ahmed A.
Rouby, Waleed M. A. El
Carrasco-Marín, Francisco
author_sort Hamdi, Esraa
collection PubMed
description Supercapacitors have the potential to be used in a variety of fields, including electric vehicles, and a lot of research is focused on unique electrode materials to enhance capacitance and stability. Herein, we prepared nickel molybdate/activated carbon (AC) nanocomposites using a facile impregnation method that preserved the carbon surface area. In order to study how the nickel-to-molybdenum ratio affects the efficiency of the electrode, different ratios between Ni-Mo were prepared and tested as supercapacitor electrodes, namely in the following ratios: 1:1, 1:2, 1:3, 1:4, and 1:5. X-ray diffraction, X-ray photoelectron spectroscopy, FESEM, HRTEM, and BET devices were extensively used to analyze the structure of the nanocomposites. The structure of the prepared nickel molybdates was discovered to be 2D hierarchical nanosheets, which functionalized the carbon surface. Among all of the electrodes, the best molar ratio between Ni-Mo was found to be 1:3 NiMo3/AC reaching (541 F·g(−1)) of specific capacitance at a current density of 1 A·g(−1), and 67 W·h·Kg(−1) of energy density at a power density of 487 W·Kg(−1). Furthermore, after 4000 repetitive cycles at a large current density of 4 A·g(−1), an amazing capacitance stability of 97.7% was maintained. This remarkable electrochemical activity for NiMo3/AC could be credited towards its 2D hierarchical structure, which has a huge surface area of 1703 m(2)·g(−1), high pore volume of 0.925 cm(3)·g(−1), and large particle size distribution.
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spelling pubmed-99217242023-02-12 2D Hierarchical NiMoO(4) Nanosheets/Activated Carbon Nanocomposites for High Performance Supercapacitors: The Effect of Nickel to Molybdenum Ratios Hamdi, Esraa Abdelwahab, Abdalla Farghali, Ahmed A. Rouby, Waleed M. A. El Carrasco-Marín, Francisco Materials (Basel) Article Supercapacitors have the potential to be used in a variety of fields, including electric vehicles, and a lot of research is focused on unique electrode materials to enhance capacitance and stability. Herein, we prepared nickel molybdate/activated carbon (AC) nanocomposites using a facile impregnation method that preserved the carbon surface area. In order to study how the nickel-to-molybdenum ratio affects the efficiency of the electrode, different ratios between Ni-Mo were prepared and tested as supercapacitor electrodes, namely in the following ratios: 1:1, 1:2, 1:3, 1:4, and 1:5. X-ray diffraction, X-ray photoelectron spectroscopy, FESEM, HRTEM, and BET devices were extensively used to analyze the structure of the nanocomposites. The structure of the prepared nickel molybdates was discovered to be 2D hierarchical nanosheets, which functionalized the carbon surface. Among all of the electrodes, the best molar ratio between Ni-Mo was found to be 1:3 NiMo3/AC reaching (541 F·g(−1)) of specific capacitance at a current density of 1 A·g(−1), and 67 W·h·Kg(−1) of energy density at a power density of 487 W·Kg(−1). Furthermore, after 4000 repetitive cycles at a large current density of 4 A·g(−1), an amazing capacitance stability of 97.7% was maintained. This remarkable electrochemical activity for NiMo3/AC could be credited towards its 2D hierarchical structure, which has a huge surface area of 1703 m(2)·g(−1), high pore volume of 0.925 cm(3)·g(−1), and large particle size distribution. MDPI 2023-02-01 /pmc/articles/PMC9921724/ /pubmed/36770269 http://dx.doi.org/10.3390/ma16031264 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Hamdi, Esraa
Abdelwahab, Abdalla
Farghali, Ahmed A.
Rouby, Waleed M. A. El
Carrasco-Marín, Francisco
2D Hierarchical NiMoO(4) Nanosheets/Activated Carbon Nanocomposites for High Performance Supercapacitors: The Effect of Nickel to Molybdenum Ratios
title 2D Hierarchical NiMoO(4) Nanosheets/Activated Carbon Nanocomposites for High Performance Supercapacitors: The Effect of Nickel to Molybdenum Ratios
title_full 2D Hierarchical NiMoO(4) Nanosheets/Activated Carbon Nanocomposites for High Performance Supercapacitors: The Effect of Nickel to Molybdenum Ratios
title_fullStr 2D Hierarchical NiMoO(4) Nanosheets/Activated Carbon Nanocomposites for High Performance Supercapacitors: The Effect of Nickel to Molybdenum Ratios
title_full_unstemmed 2D Hierarchical NiMoO(4) Nanosheets/Activated Carbon Nanocomposites for High Performance Supercapacitors: The Effect of Nickel to Molybdenum Ratios
title_short 2D Hierarchical NiMoO(4) Nanosheets/Activated Carbon Nanocomposites for High Performance Supercapacitors: The Effect of Nickel to Molybdenum Ratios
title_sort 2d hierarchical nimoo(4) nanosheets/activated carbon nanocomposites for high performance supercapacitors: the effect of nickel to molybdenum ratios
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9921724/
https://www.ncbi.nlm.nih.gov/pubmed/36770269
http://dx.doi.org/10.3390/ma16031264
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