Co3O4/SiO2 Nanocomposites for Supercapacitor Application

In this study, Co3O4/SiO2 nanocomposites have been successfully synthesized by citrate–gel method by utilizing SiO2 matrix for Co3O4 embedment. Spectroscopy analyses confirm the formation of high crystalline Co3O4 nanoparticles; meanwhile, microscopy findings reveal that the Co3O4 nanoparticles are...

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Main Authors:	Ali, Gomaa A. M., Fouad, Osama A., Makhlouf, Salah A., M. M., Yusoff, K. F., Chong
Format:	Article
Language:	English
Published:	Springer Link 2014
Subjects:	QD Chemistry
Online Access:	http://umpir.ump.edu.my/id/eprint/8063/ http://umpir.ump.edu.my/id/eprint/8063/ http://umpir.ump.edu.my/id/eprint/8063/ http://umpir.ump.edu.my/id/eprint/8063/1/fist-2014-gomaa-Co3O4SiO2%20Nanocomposites.pdf

id	ump-8063
recordtype	eprints
spelling	ump-80632018-07-26T06:46:45Z http://umpir.ump.edu.my/id/eprint/8063/ Co3O4/SiO2 Nanocomposites for Supercapacitor Application Ali, Gomaa A. M. Fouad, Osama A. Makhlouf, Salah A. M. M., Yusoff K. F., Chong QD Chemistry In this study, Co3O4/SiO2 nanocomposites have been successfully synthesized by citrate–gel method by utilizing SiO2 matrix for Co3O4 embedment. Spectroscopy analyses confirm the formation of high crystalline Co3O4 nanoparticles; meanwhile, microscopy findings reveal that the Co3O4 nanoparticles are embedded in SiO2 matrix. Electrochemical properties of the Co3O4/SiO2 nanocomposites were carried out using cyclic voltammetry (CV), galvanostatic charge–discharge, and electrochemical impedance spectroscopy(EIS) in 5 M KOH electrolyte. The findings show that the charge storage of Co3O4/SiO2 nanocomposites is mainly due to the reversible redox reaction (pseudocapacitance). The highest specific capacitance of 1,143 F g−1 could be achieved at a scan rate of 2.5 mV s−1 in the potential region between 0 and 0.6 V. Furthermore, high-capacitance retention (>92 %) after 900 continuous charge–discharge tests reveals the excellent stability of the nanocomposites. It is worth noting from the EIS measurements that the nanocomposites have low ESR value of 0.33 Ω. The results manifest that Co3O4/SiO2 nanocomposites are the promising electrode material for supercapacitor application. Springer Link 2014-05-18 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/8063/1/fist-2014-gomaa-Co3O4SiO2%20Nanocomposites.pdf Ali, Gomaa A. M. and Fouad, Osama A. and Makhlouf, Salah A. and M. M., Yusoff and K. F., Chong (2014) Co3O4/SiO2 Nanocomposites for Supercapacitor Application. Journal of Solid State Electrochemistry, 18 (9). pp. 2505-2512. ISSN 1432-8488 (print); 1433-076 (online) http://dx.doi.org/10.1007/s10008-014-2510-3 DOI 10.1007/s10008-014-2510-3
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	QD Chemistry
spellingShingle	QD Chemistry Ali, Gomaa A. M. Fouad, Osama A. Makhlouf, Salah A. M. M., Yusoff K. F., Chong Co3O4/SiO2 Nanocomposites for Supercapacitor Application
description	In this study, Co3O4/SiO2 nanocomposites have been successfully synthesized by citrate–gel method by utilizing SiO2 matrix for Co3O4 embedment. Spectroscopy analyses confirm the formation of high crystalline Co3O4 nanoparticles; meanwhile, microscopy findings reveal that the Co3O4 nanoparticles are embedded in SiO2 matrix. Electrochemical properties of the Co3O4/SiO2 nanocomposites were carried out using cyclic voltammetry (CV), galvanostatic charge–discharge, and electrochemical impedance spectroscopy(EIS) in 5 M KOH electrolyte. The findings show that the charge storage of Co3O4/SiO2 nanocomposites is mainly due to the reversible redox reaction (pseudocapacitance). The highest specific capacitance of 1,143 F g−1 could be achieved at a scan rate of 2.5 mV s−1 in the potential region between 0 and 0.6 V. Furthermore, high-capacitance retention (>92 %) after 900 continuous charge–discharge tests reveals the excellent stability of the nanocomposites. It is worth noting from the EIS measurements that the nanocomposites have low ESR value of 0.33 Ω. The results manifest that Co3O4/SiO2 nanocomposites are the promising electrode material for supercapacitor application.
format	Article
author	Ali, Gomaa A. M. Fouad, Osama A. Makhlouf, Salah A. M. M., Yusoff K. F., Chong
author_facet	Ali, Gomaa A. M. Fouad, Osama A. Makhlouf, Salah A. M. M., Yusoff K. F., Chong
author_sort	Ali, Gomaa A. M.
title	Co3O4/SiO2 Nanocomposites for Supercapacitor Application
title_short	Co3O4/SiO2 Nanocomposites for Supercapacitor Application
title_full	Co3O4/SiO2 Nanocomposites for Supercapacitor Application
title_fullStr	Co3O4/SiO2 Nanocomposites for Supercapacitor Application
title_full_unstemmed	Co3O4/SiO2 Nanocomposites for Supercapacitor Application
title_sort	co3o4/sio2 nanocomposites for supercapacitor application
publisher	Springer Link
publishDate	2014
url	http://umpir.ump.edu.my/id/eprint/8063/ http://umpir.ump.edu.my/id/eprint/8063/ http://umpir.ump.edu.my/id/eprint/8063/ http://umpir.ump.edu.my/id/eprint/8063/1/fist-2014-gomaa-Co3O4SiO2%20Nanocomposites.pdf
first_indexed	2023-09-18T22:05:20Z
last_indexed	2023-09-18T22:05:20Z
_version_	1777414670627373056

Co3O4/SiO2 Nanocomposites for Supercapacitor Application

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