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Core-Shell Carbon Nanofibers@Ni(OH)(2)/NiO Composites for High-Performance Asymmetric Supercapacitors
The application of transition metal oxides/hydroxides in energy storage has long been studied by researchers. In this paper, the core-shell CNFs@Ni(OH)(2)/NiO composite electrodes were prepared by calcining carbon nanofibers (CNFs) coated with Ni(OH)(2) under an N(2) atmosphere, in which NiO was gen...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9738488/ https://www.ncbi.nlm.nih.gov/pubmed/36499871 http://dx.doi.org/10.3390/ma15238377 |
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author | Fan, Peizhi Xu, Lan |
author_facet | Fan, Peizhi Xu, Lan |
author_sort | Fan, Peizhi |
collection | PubMed |
description | The application of transition metal oxides/hydroxides in energy storage has long been studied by researchers. In this paper, the core-shell CNFs@Ni(OH)(2)/NiO composite electrodes were prepared by calcining carbon nanofibers (CNFs) coated with Ni(OH)(2) under an N(2) atmosphere, in which NiO was generated by the thermal decomposition of Ni(OH)(2). After low-temperature carbonization at 200 °C, 250 °C and 300 °C for 1 h, Ni(OH)(2) or/and NiO existed on the surface of CNFs to form the core-shell composite CNFs@Ni(OH)(2)/NiO-X (X = 200, 250, 300), in which CNFs@Ni(OH)(2)/NiO-250 had the optimal electrochemical properties due to the coexistence of Ni(OH)(2) and NiO. Its specific capacitance could reach 695 F g(−1) at 1 A g(−1), and it still had 74% capacitance retention and 88% coulomb efficiency after 2000 cycles at 5 A g(−1). Additionally, the asymmetric supercapacitor (ASC) assembled from CNFs@Ni(OH)(2)/NiO-250 had excellent energy storage performance with a maximum power density of 4000 W kg(−1) and a maximum functional capacity density of 16.56 Wh kg(−1). |
format | Online Article Text |
id | pubmed-9738488 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-97384882022-12-11 Core-Shell Carbon Nanofibers@Ni(OH)(2)/NiO Composites for High-Performance Asymmetric Supercapacitors Fan, Peizhi Xu, Lan Materials (Basel) Article The application of transition metal oxides/hydroxides in energy storage has long been studied by researchers. In this paper, the core-shell CNFs@Ni(OH)(2)/NiO composite electrodes were prepared by calcining carbon nanofibers (CNFs) coated with Ni(OH)(2) under an N(2) atmosphere, in which NiO was generated by the thermal decomposition of Ni(OH)(2). After low-temperature carbonization at 200 °C, 250 °C and 300 °C for 1 h, Ni(OH)(2) or/and NiO existed on the surface of CNFs to form the core-shell composite CNFs@Ni(OH)(2)/NiO-X (X = 200, 250, 300), in which CNFs@Ni(OH)(2)/NiO-250 had the optimal electrochemical properties due to the coexistence of Ni(OH)(2) and NiO. Its specific capacitance could reach 695 F g(−1) at 1 A g(−1), and it still had 74% capacitance retention and 88% coulomb efficiency after 2000 cycles at 5 A g(−1). Additionally, the asymmetric supercapacitor (ASC) assembled from CNFs@Ni(OH)(2)/NiO-250 had excellent energy storage performance with a maximum power density of 4000 W kg(−1) and a maximum functional capacity density of 16.56 Wh kg(−1). MDPI 2022-11-24 /pmc/articles/PMC9738488/ /pubmed/36499871 http://dx.doi.org/10.3390/ma15238377 Text en © 2022 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 Fan, Peizhi Xu, Lan Core-Shell Carbon Nanofibers@Ni(OH)(2)/NiO Composites for High-Performance Asymmetric Supercapacitors |
title | Core-Shell Carbon Nanofibers@Ni(OH)(2)/NiO Composites for High-Performance Asymmetric Supercapacitors |
title_full | Core-Shell Carbon Nanofibers@Ni(OH)(2)/NiO Composites for High-Performance Asymmetric Supercapacitors |
title_fullStr | Core-Shell Carbon Nanofibers@Ni(OH)(2)/NiO Composites for High-Performance Asymmetric Supercapacitors |
title_full_unstemmed | Core-Shell Carbon Nanofibers@Ni(OH)(2)/NiO Composites for High-Performance Asymmetric Supercapacitors |
title_short | Core-Shell Carbon Nanofibers@Ni(OH)(2)/NiO Composites for High-Performance Asymmetric Supercapacitors |
title_sort | core-shell carbon nanofibers@ni(oh)(2)/nio composites for high-performance asymmetric supercapacitors |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9738488/ https://www.ncbi.nlm.nih.gov/pubmed/36499871 http://dx.doi.org/10.3390/ma15238377 |
work_keys_str_mv | AT fanpeizhi coreshellcarbonnanofibersnioh2niocompositesforhighperformanceasymmetricsupercapacitors AT xulan coreshellcarbonnanofibersnioh2niocompositesforhighperformanceasymmetricsupercapacitors |