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High Density Arrayed Ni/NiO Core-shell Nanospheres Evenly Distributed on Graphene for Ultrahigh Performance Supercapacitor

A novel NiO/Ni/RGO three-dimensional core-shell architecture consisting of Ni nanoparticles as core, NiO as shell and reduced graphene oxide (RGO) as conductivity layer, has been constructed by redox reactions with hydrothermal method and heat treatment. High density arrayed nickel nanoparticles (20...

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Autores principales: Liu, Fanggang, Wang, Xiaobing, Hao, Jin, Han, Shuang, Lian, Jianshe, Jiang, Qing
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5735128/
https://www.ncbi.nlm.nih.gov/pubmed/29255141
http://dx.doi.org/10.1038/s41598-017-17899-6
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author Liu, Fanggang
Wang, Xiaobing
Hao, Jin
Han, Shuang
Lian, Jianshe
Jiang, Qing
author_facet Liu, Fanggang
Wang, Xiaobing
Hao, Jin
Han, Shuang
Lian, Jianshe
Jiang, Qing
author_sort Liu, Fanggang
collection PubMed
description A novel NiO/Ni/RGO three-dimensional core-shell architecture consisting of Ni nanoparticles as core, NiO as shell and reduced graphene oxide (RGO) as conductivity layer, has been constructed by redox reactions with hydrothermal method and heat treatment. High density arrayed nickel nanoparticles (20 nm diameter) semi-coated by a 3 nm thick layer of NiO are evenly distributed on the surface of graphene. This elaborate design not only uses abundant NiO surfaces to provide a wealth of active sites, but also bridges electrochemical active NiO shell and graphene by Ni core to construct an interconnected 3D conductive network. Since both electrochemical activity and excellent conductivity are reserved in this Ni/NiO core-shell/graphene layer 3D structure, the as-prepared electrode material exhibits an extremely high specific capacitance (2048.3 F g(−1) at current density of 1 A g(−1)) and excellent cycle stability (77.8% capacitance retention after 10000 cycles at current density of 50 A g(−1)). The novel method presented here is easy and effective and would provide reference for the preparation of other high performance supercapacitor electrodes.
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spelling pubmed-57351282017-12-21 High Density Arrayed Ni/NiO Core-shell Nanospheres Evenly Distributed on Graphene for Ultrahigh Performance Supercapacitor Liu, Fanggang Wang, Xiaobing Hao, Jin Han, Shuang Lian, Jianshe Jiang, Qing Sci Rep Article A novel NiO/Ni/RGO three-dimensional core-shell architecture consisting of Ni nanoparticles as core, NiO as shell and reduced graphene oxide (RGO) as conductivity layer, has been constructed by redox reactions with hydrothermal method and heat treatment. High density arrayed nickel nanoparticles (20 nm diameter) semi-coated by a 3 nm thick layer of NiO are evenly distributed on the surface of graphene. This elaborate design not only uses abundant NiO surfaces to provide a wealth of active sites, but also bridges electrochemical active NiO shell and graphene by Ni core to construct an interconnected 3D conductive network. Since both electrochemical activity and excellent conductivity are reserved in this Ni/NiO core-shell/graphene layer 3D structure, the as-prepared electrode material exhibits an extremely high specific capacitance (2048.3 F g(−1) at current density of 1 A g(−1)) and excellent cycle stability (77.8% capacitance retention after 10000 cycles at current density of 50 A g(−1)). The novel method presented here is easy and effective and would provide reference for the preparation of other high performance supercapacitor electrodes. Nature Publishing Group UK 2017-12-18 /pmc/articles/PMC5735128/ /pubmed/29255141 http://dx.doi.org/10.1038/s41598-017-17899-6 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Liu, Fanggang
Wang, Xiaobing
Hao, Jin
Han, Shuang
Lian, Jianshe
Jiang, Qing
High Density Arrayed Ni/NiO Core-shell Nanospheres Evenly Distributed on Graphene for Ultrahigh Performance Supercapacitor
title High Density Arrayed Ni/NiO Core-shell Nanospheres Evenly Distributed on Graphene for Ultrahigh Performance Supercapacitor
title_full High Density Arrayed Ni/NiO Core-shell Nanospheres Evenly Distributed on Graphene for Ultrahigh Performance Supercapacitor
title_fullStr High Density Arrayed Ni/NiO Core-shell Nanospheres Evenly Distributed on Graphene for Ultrahigh Performance Supercapacitor
title_full_unstemmed High Density Arrayed Ni/NiO Core-shell Nanospheres Evenly Distributed on Graphene for Ultrahigh Performance Supercapacitor
title_short High Density Arrayed Ni/NiO Core-shell Nanospheres Evenly Distributed on Graphene for Ultrahigh Performance Supercapacitor
title_sort high density arrayed ni/nio core-shell nanospheres evenly distributed on graphene for ultrahigh performance supercapacitor
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5735128/
https://www.ncbi.nlm.nih.gov/pubmed/29255141
http://dx.doi.org/10.1038/s41598-017-17899-6
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