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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/8063/1/fist-2014-gomaa-Co3O4SiO2%20Nanocomposites.pdf
http://umpir.ump.edu.my/id/eprint/8063/
http://dx.doi.org/10.1007/s10008-014-2510-3
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spelling my.ump.umpir.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
institution Universiti Malaysia Pahang
building UMP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Pahang
content_source UMP Institutional Repository
url_provider http://umpir.ump.edu.my/
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/8063/1/fist-2014-gomaa-Co3O4SiO2%20Nanocomposites.pdf
http://umpir.ump.edu.my/id/eprint/8063/
http://dx.doi.org/10.1007/s10008-014-2510-3
_version_ 1643665784542593024
score 13.211869

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