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Co(3)O(4)@CoS Core-Shell Nanosheets on Carbon Cloth for High Performance Supercapacitor Electrodes
In this work, a two-step electrodeposition strategy is developed for the synthesis of core-shell Co(3)O(4)@CoS nanosheet arrays on carbon cloth (CC) for supercapacitor applications. Porous Co(3)O(4) nanosheet arrays are first directly grown on CC by electrodeposition, followed by the coating of a th...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5553425/ https://www.ncbi.nlm.nih.gov/pubmed/28772968 http://dx.doi.org/10.3390/ma10060608 |
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author | Ning, Jinfeng Zhang, Tianyu He, Ying Jia, Congpu Saha, Petr Cheng, Qilin |
author_facet | Ning, Jinfeng Zhang, Tianyu He, Ying Jia, Congpu Saha, Petr Cheng, Qilin |
author_sort | Ning, Jinfeng |
collection | PubMed |
description | In this work, a two-step electrodeposition strategy is developed for the synthesis of core-shell Co(3)O(4)@CoS nanosheet arrays on carbon cloth (CC) for supercapacitor applications. Porous Co(3)O(4) nanosheet arrays are first directly grown on CC by electrodeposition, followed by the coating of a thin layer of CoS on the surface of Co(3)O(4) nanosheets via the secondary electrodeposition. The morphology control of the ternary composites can be easily achieved by altering the number of cyclic voltammetry (CV) cycles of CoS deposition. Electrochemical performance of the composite electrodes was evaluated by cyclic voltammetry, galvanostatic charge–discharge and electrochemical impedance spectroscopy techniques. The results demonstrate that the Co(3)O(4)@CoS/CC with 4 CV cycles of CoS deposition possesses the largest specific capacitance 887.5 F·g(−1) at a scan rate of 10 mV·s(−1) (764.2 F·g(−1) at a current density of 1.0 A·g(−1)), and excellent cycling stability (78.1% capacitance retention) at high current density of 5.0 A·g(−1) after 5000 cycles. The porous nanostructures on CC not only provide large accessible surface area for fast ions diffusion, electron transport and efficient utilization of active CoS and Co(3)O(4), but also reduce the internal resistance of electrodes, which leads to superior electrochemical performance of Co(3)O(4)@CoS/CC composite at 4 cycles of CoS deposition. |
format | Online Article Text |
id | pubmed-5553425 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-55534252017-08-14 Co(3)O(4)@CoS Core-Shell Nanosheets on Carbon Cloth for High Performance Supercapacitor Electrodes Ning, Jinfeng Zhang, Tianyu He, Ying Jia, Congpu Saha, Petr Cheng, Qilin Materials (Basel) Article In this work, a two-step electrodeposition strategy is developed for the synthesis of core-shell Co(3)O(4)@CoS nanosheet arrays on carbon cloth (CC) for supercapacitor applications. Porous Co(3)O(4) nanosheet arrays are first directly grown on CC by electrodeposition, followed by the coating of a thin layer of CoS on the surface of Co(3)O(4) nanosheets via the secondary electrodeposition. The morphology control of the ternary composites can be easily achieved by altering the number of cyclic voltammetry (CV) cycles of CoS deposition. Electrochemical performance of the composite electrodes was evaluated by cyclic voltammetry, galvanostatic charge–discharge and electrochemical impedance spectroscopy techniques. The results demonstrate that the Co(3)O(4)@CoS/CC with 4 CV cycles of CoS deposition possesses the largest specific capacitance 887.5 F·g(−1) at a scan rate of 10 mV·s(−1) (764.2 F·g(−1) at a current density of 1.0 A·g(−1)), and excellent cycling stability (78.1% capacitance retention) at high current density of 5.0 A·g(−1) after 5000 cycles. The porous nanostructures on CC not only provide large accessible surface area for fast ions diffusion, electron transport and efficient utilization of active CoS and Co(3)O(4), but also reduce the internal resistance of electrodes, which leads to superior electrochemical performance of Co(3)O(4)@CoS/CC composite at 4 cycles of CoS deposition. MDPI 2017-06-01 /pmc/articles/PMC5553425/ /pubmed/28772968 http://dx.doi.org/10.3390/ma10060608 Text en © 2017 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Ning, Jinfeng Zhang, Tianyu He, Ying Jia, Congpu Saha, Petr Cheng, Qilin Co(3)O(4)@CoS Core-Shell Nanosheets on Carbon Cloth for High Performance Supercapacitor Electrodes |
title | Co(3)O(4)@CoS Core-Shell Nanosheets on Carbon Cloth for High Performance Supercapacitor Electrodes |
title_full | Co(3)O(4)@CoS Core-Shell Nanosheets on Carbon Cloth for High Performance Supercapacitor Electrodes |
title_fullStr | Co(3)O(4)@CoS Core-Shell Nanosheets on Carbon Cloth for High Performance Supercapacitor Electrodes |
title_full_unstemmed | Co(3)O(4)@CoS Core-Shell Nanosheets on Carbon Cloth for High Performance Supercapacitor Electrodes |
title_short | Co(3)O(4)@CoS Core-Shell Nanosheets on Carbon Cloth for High Performance Supercapacitor Electrodes |
title_sort | co(3)o(4)@cos core-shell nanosheets on carbon cloth for high performance supercapacitor electrodes |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5553425/ https://www.ncbi.nlm.nih.gov/pubmed/28772968 http://dx.doi.org/10.3390/ma10060608 |
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