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Enhanced Capacitance of Hybrid Layered Graphene/Nickel Nanocomposite for Supercapacitors

In this work, Ni nanoparticles were directly decorated on graphene (G) nanosheets via mechanical ball milling. Based on transmission electron microscopy observations, the Ni nanoparticles were well dispersed and attached to the G nanosheet without any agglomerations. Electrochemical results showed t...

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Detalles Bibliográficos
Autores principales: Mohd Zaid, Norsaadatul Akmal, Idris, Nurul Hayati
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4995428/
https://www.ncbi.nlm.nih.gov/pubmed/27553290
http://dx.doi.org/10.1038/srep32082
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author Mohd Zaid, Norsaadatul Akmal
Idris, Nurul Hayati
author_facet Mohd Zaid, Norsaadatul Akmal
Idris, Nurul Hayati
author_sort Mohd Zaid, Norsaadatul Akmal
collection PubMed
description In this work, Ni nanoparticles were directly decorated on graphene (G) nanosheets via mechanical ball milling. Based on transmission electron microscopy observations, the Ni nanoparticles were well dispersed and attached to the G nanosheet without any agglomerations. Electrochemical results showed that the capacitance of a G/Ni nanocomposite was 275 F g(−1) at a current density of 2 A g(−1), which is higher than the capacitance of bare G (145 F g(−1)) and bare Ni (3 F g(−1)). The G/Ni electrode also showed superior performance at a high current density, exhibiting a capacitance of 190 F g(−1) at a current density of 5 A g(−1) and a capacitance of 144 F g(−1) at a current density of 10 A g(−1). The equivalent series resistance for G/Ni nanocomposites also decreased. The enhanced performance of this hybrid supercapacitor is best described by the synergistic effect, i.e. dual charge-storage mechanism, which is demonstrated by electrical double layer and pseudocapacitance materials. Moreover, a high specific surface area and electrical conductivity of the materials enhanced the capacitance. These results indicate that the G/Ni nanocomposite is a potential supercapacitor.
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spelling pubmed-49954282016-08-30 Enhanced Capacitance of Hybrid Layered Graphene/Nickel Nanocomposite for Supercapacitors Mohd Zaid, Norsaadatul Akmal Idris, Nurul Hayati Sci Rep Article In this work, Ni nanoparticles were directly decorated on graphene (G) nanosheets via mechanical ball milling. Based on transmission electron microscopy observations, the Ni nanoparticles were well dispersed and attached to the G nanosheet without any agglomerations. Electrochemical results showed that the capacitance of a G/Ni nanocomposite was 275 F g(−1) at a current density of 2 A g(−1), which is higher than the capacitance of bare G (145 F g(−1)) and bare Ni (3 F g(−1)). The G/Ni electrode also showed superior performance at a high current density, exhibiting a capacitance of 190 F g(−1) at a current density of 5 A g(−1) and a capacitance of 144 F g(−1) at a current density of 10 A g(−1). The equivalent series resistance for G/Ni nanocomposites also decreased. The enhanced performance of this hybrid supercapacitor is best described by the synergistic effect, i.e. dual charge-storage mechanism, which is demonstrated by electrical double layer and pseudocapacitance materials. Moreover, a high specific surface area and electrical conductivity of the materials enhanced the capacitance. These results indicate that the G/Ni nanocomposite is a potential supercapacitor. Nature Publishing Group 2016-08-24 /pmc/articles/PMC4995428/ /pubmed/27553290 http://dx.doi.org/10.1038/srep32082 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Mohd Zaid, Norsaadatul Akmal
Idris, Nurul Hayati
Enhanced Capacitance of Hybrid Layered Graphene/Nickel Nanocomposite for Supercapacitors
title Enhanced Capacitance of Hybrid Layered Graphene/Nickel Nanocomposite for Supercapacitors
title_full Enhanced Capacitance of Hybrid Layered Graphene/Nickel Nanocomposite for Supercapacitors
title_fullStr Enhanced Capacitance of Hybrid Layered Graphene/Nickel Nanocomposite for Supercapacitors
title_full_unstemmed Enhanced Capacitance of Hybrid Layered Graphene/Nickel Nanocomposite for Supercapacitors
title_short Enhanced Capacitance of Hybrid Layered Graphene/Nickel Nanocomposite for Supercapacitors
title_sort enhanced capacitance of hybrid layered graphene/nickel nanocomposite for supercapacitors
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4995428/
https://www.ncbi.nlm.nih.gov/pubmed/27553290
http://dx.doi.org/10.1038/srep32082
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