Nano Fe3O4-activated carbon composites for aqueous supercapacitors

In this study, a symmetric supercapacitor has been fabricated by adopting the nanostructured iron oxide (Fe3O4)-activated carbon (AC) composite as the core electrode materials. The composite electrodes were prepared via a facile mechanical mixing process and PTFE polymeric solution has been used as...

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Main Authors:	M.Y., Ho, P.S., Khiew, Isa, D., T.K., Tan, W.S., Chiu, C.H., Chia, Hamid, M.A.A., Shamsudin, R.
Format:	Article
Language:	English
Published:	Universiti Kebangsaan Malaysia 2014
Online Access:	http://journalarticle.ukm.my/7177/ http://journalarticle.ukm.my/7177/ http://journalarticle.ukm.my/7177/1/10_M.Y._Ho.pdf

id	ukm-7177
recordtype	eprints
spelling	ukm-71772016-12-14T06:43:18Z http://journalarticle.ukm.my/7177/ Nano Fe3O4-activated carbon composites for aqueous supercapacitors M.Y., Ho P.S., Khiew Isa, D. T.K., Tan W.S., Chiu C.H., Chia Hamid, M.A.A. Shamsudin, R. In this study, a symmetric supercapacitor has been fabricated by adopting the nanostructured iron oxide (Fe3O4)-activated carbon (AC) composite as the core electrode materials. The composite electrodes were prepared via a facile mechanical mixing process and PTFE polymeric solution has been used as the electrode material binder. Structural analysis of the nanocomposite electrodes were characterized by scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET) analysis. The electrochemical performances of the prepared supercapacitor were studied using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) in 1.0 M Na2SO3 and 1.0 M Na2SO4 aqueous solutions, respectively. The experimental results showed that the highest specific capacitance of 43 F/g is achieved with a fairly low Fe3O4 nanomaterials loading (4 wt. %) in 1 M Na2SO3. It is clear that the low concentration of nanostructured Fe3O4 has improved the capacitive performance of the composite via pseudocapacitance charge storage mechanism as well as the enhancement on the specific surface areas of the electrode. However, further increasing of the Fe3O4 content in the electrode is found to distort the capacitive performance and deteriorate the specific surface area of the electrode, mainly due to the aggregation of the Fe3O4 particles within the composite. Additionally, the CV results showed that the Fe3O4/AC nanocomposite electrode in Na2SO3 electrolyte exhibits a better charge storage performance if compared with Na2SO4 solution. It is believed that Fe3O4 nanoparticles can provide favourable surface adsorption sites for sulphite (SO32-) anions which act as catalysts for subsequent redox and intercalation reactions. Universiti Kebangsaan Malaysia 2014-06 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/7177/1/10_M.Y._Ho.pdf M.Y., Ho and P.S., Khiew and Isa, D. and T.K., Tan and W.S., Chiu and C.H., Chia and Hamid, M.A.A. and Shamsudin, R. (2014) Nano Fe3O4-activated carbon composites for aqueous supercapacitors. Sains Malaysiana, 43 (6). pp. 885-894. ISSN 0126-6039 http://www.ukm.my/jsm/
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
language	English
description	In this study, a symmetric supercapacitor has been fabricated by adopting the nanostructured iron oxide (Fe3O4)-activated carbon (AC) composite as the core electrode materials. The composite electrodes were prepared via a facile mechanical mixing process and PTFE polymeric solution has been used as the electrode material binder. Structural analysis of the nanocomposite electrodes were characterized by scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET) analysis. The electrochemical performances of the prepared supercapacitor were studied using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) in 1.0 M Na2SO3 and 1.0 M Na2SO4 aqueous solutions, respectively. The experimental results showed that the highest specific capacitance of 43 F/g is achieved with a fairly low Fe3O4 nanomaterials loading (4 wt. %) in 1 M Na2SO3. It is clear that the low concentration of nanostructured Fe3O4 has improved the capacitive performance of the composite via pseudocapacitance charge storage mechanism as well as the enhancement on the specific surface areas of the electrode. However, further increasing of the Fe3O4 content in the electrode is found to distort the capacitive performance and deteriorate the specific surface area of the electrode, mainly due to the aggregation of the Fe3O4 particles within the composite. Additionally, the CV results showed that the Fe3O4/AC nanocomposite electrode in Na2SO3 electrolyte exhibits a better charge storage performance if compared with Na2SO4 solution. It is believed that Fe3O4 nanoparticles can provide favourable surface adsorption sites for sulphite (SO32-) anions which act as catalysts for subsequent redox and intercalation reactions.
format	Article
author	M.Y., Ho P.S., Khiew Isa, D. T.K., Tan W.S., Chiu C.H., Chia Hamid, M.A.A. Shamsudin, R.
spellingShingle	M.Y., Ho P.S., Khiew Isa, D. T.K., Tan W.S., Chiu C.H., Chia Hamid, M.A.A. Shamsudin, R. Nano Fe3O4-activated carbon composites for aqueous supercapacitors
author_facet	M.Y., Ho P.S., Khiew Isa, D. T.K., Tan W.S., Chiu C.H., Chia Hamid, M.A.A. Shamsudin, R.
author_sort	M.Y., Ho
title	Nano Fe3O4-activated carbon composites for aqueous supercapacitors
title_short	Nano Fe3O4-activated carbon composites for aqueous supercapacitors
title_full	Nano Fe3O4-activated carbon composites for aqueous supercapacitors
title_fullStr	Nano Fe3O4-activated carbon composites for aqueous supercapacitors
title_full_unstemmed	Nano Fe3O4-activated carbon composites for aqueous supercapacitors
title_sort	nano fe3o4-activated carbon composites for aqueous supercapacitors
publisher	Universiti Kebangsaan Malaysia
publishDate	2014
url	http://journalarticle.ukm.my/7177/ http://journalarticle.ukm.my/7177/ http://journalarticle.ukm.my/7177/1/10_M.Y._Ho.pdf
first_indexed	2023-09-18T19:48:57Z
last_indexed	2023-09-18T19:48:57Z
_version_	1777406089422176256

Nano Fe3O4-activated carbon composites for aqueous supercapacitors

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