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Facile Synthesis of Zn-Co-S Nanostrip Cluster Arrays on Ni Foam for High-Performance Hybrid Supercapacitors

Mixed metal sulfides exhibit outstanding electrochemical performance compared to single metal sulfides and mixed metal oxides because of their richer redox reactions and high electronic conductivity. In the present study, Zn-Co-S nanostrip cluster arrays were formed from ZnCo(2)O(4) grown on Ni foam...

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Autores principales: Vijayakumar, Subbukalai, Dhakal, Ganesh, Kim, Soo-Hyun, Lee, Jintae, Lee, Yong Rok, Shim, Jae-Jin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8706522/
https://www.ncbi.nlm.nih.gov/pubmed/34947557
http://dx.doi.org/10.3390/nano11123209
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author Vijayakumar, Subbukalai
Dhakal, Ganesh
Kim, Soo-Hyun
Lee, Jintae
Lee, Yong Rok
Shim, Jae-Jin
author_facet Vijayakumar, Subbukalai
Dhakal, Ganesh
Kim, Soo-Hyun
Lee, Jintae
Lee, Yong Rok
Shim, Jae-Jin
author_sort Vijayakumar, Subbukalai
collection PubMed
description Mixed metal sulfides exhibit outstanding electrochemical performance compared to single metal sulfides and mixed metal oxides because of their richer redox reactions and high electronic conductivity. In the present study, Zn-Co-S nanostrip cluster arrays were formed from ZnCo(2)O(4) grown on Ni foam by an anion exchange reaction using a two-step hydrothermal process. Morphological characterization confirmed that the Zn-Co-S nanostrip cluster arrays had grown homogeneously on the skeleton of the 3D Ni foam. The length of the nanostrip was approximately 8 µm, and the width ranged from 600 to 800 nm. The Ni foam-supported Zn-Co-S nanostrip cluster arrays were assessed directly for electrochemical supercapacitor applications. Compared to ZnCo(2)O(4), the Zn-Co-S electrode exhibited a three-fold higher specific capacity of 830 C g(−1) at a specific current of 2.0 A g(−1). The higher polarizability, lower electro-negativity, and larger size of the S(2−) ion played an important role in substituting oxygen with sulfur, which enhanced the performance. The Zn-Co-S//AC hybrid device delivered a maximum specific energy of 19.0 Wh kg(−1) at a specific power of 514 W kg(−1). The remarkable performance of Zn-Co-S nanostrip cluster arrays highlights their potential as a positive electrode for hybrid supercapacitor applications.
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spelling pubmed-87065222021-12-25 Facile Synthesis of Zn-Co-S Nanostrip Cluster Arrays on Ni Foam for High-Performance Hybrid Supercapacitors Vijayakumar, Subbukalai Dhakal, Ganesh Kim, Soo-Hyun Lee, Jintae Lee, Yong Rok Shim, Jae-Jin Nanomaterials (Basel) Article Mixed metal sulfides exhibit outstanding electrochemical performance compared to single metal sulfides and mixed metal oxides because of their richer redox reactions and high electronic conductivity. In the present study, Zn-Co-S nanostrip cluster arrays were formed from ZnCo(2)O(4) grown on Ni foam by an anion exchange reaction using a two-step hydrothermal process. Morphological characterization confirmed that the Zn-Co-S nanostrip cluster arrays had grown homogeneously on the skeleton of the 3D Ni foam. The length of the nanostrip was approximately 8 µm, and the width ranged from 600 to 800 nm. The Ni foam-supported Zn-Co-S nanostrip cluster arrays were assessed directly for electrochemical supercapacitor applications. Compared to ZnCo(2)O(4), the Zn-Co-S electrode exhibited a three-fold higher specific capacity of 830 C g(−1) at a specific current of 2.0 A g(−1). The higher polarizability, lower electro-negativity, and larger size of the S(2−) ion played an important role in substituting oxygen with sulfur, which enhanced the performance. The Zn-Co-S//AC hybrid device delivered a maximum specific energy of 19.0 Wh kg(−1) at a specific power of 514 W kg(−1). The remarkable performance of Zn-Co-S nanostrip cluster arrays highlights their potential as a positive electrode for hybrid supercapacitor applications. MDPI 2021-11-26 /pmc/articles/PMC8706522/ /pubmed/34947557 http://dx.doi.org/10.3390/nano11123209 Text en © 2021 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
Vijayakumar, Subbukalai
Dhakal, Ganesh
Kim, Soo-Hyun
Lee, Jintae
Lee, Yong Rok
Shim, Jae-Jin
Facile Synthesis of Zn-Co-S Nanostrip Cluster Arrays on Ni Foam for High-Performance Hybrid Supercapacitors
title Facile Synthesis of Zn-Co-S Nanostrip Cluster Arrays on Ni Foam for High-Performance Hybrid Supercapacitors
title_full Facile Synthesis of Zn-Co-S Nanostrip Cluster Arrays on Ni Foam for High-Performance Hybrid Supercapacitors
title_fullStr Facile Synthesis of Zn-Co-S Nanostrip Cluster Arrays on Ni Foam for High-Performance Hybrid Supercapacitors
title_full_unstemmed Facile Synthesis of Zn-Co-S Nanostrip Cluster Arrays on Ni Foam for High-Performance Hybrid Supercapacitors
title_short Facile Synthesis of Zn-Co-S Nanostrip Cluster Arrays on Ni Foam for High-Performance Hybrid Supercapacitors
title_sort facile synthesis of zn-co-s nanostrip cluster arrays on ni foam for high-performance hybrid supercapacitors
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8706522/
https://www.ncbi.nlm.nih.gov/pubmed/34947557
http://dx.doi.org/10.3390/nano11123209
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