Size-dependent charge storage of graphene flakes

This paper focuses on the charge storage properties of reduced graphene oxide (rGO) in different flake sizes. Sonication is used to exfoliate rGO into different flake sizes, as confirmed by the spectroscopy and microscopy techniques. The oxygen-related functionalities on rGO samples are quantified b...

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Main Authors:	K. F., Chong, C. Chan, Geraldine S., Ali, Gomaa A. M., Eunice Tang, Danella, Algarni, H.
Format:	Conference or Workshop Item
Language:	English English
Published:	2018
Subjects:	QD Chemistry
Online Access:	http://umpir.ump.edu.my/id/eprint/21996/ http://umpir.ump.edu.my/id/eprint/21996/1/38.%20Size-dependent%20charge%20storage%20of%20graphene%20flakes.pdf http://umpir.ump.edu.my/id/eprint/21996/2/38.1%20Size-dependent%20charge%20storage%20of%20graphene%20flakes.pdf

id	ump-21996
recordtype	eprints
spelling	ump-219962018-09-21T07:14:22Z http://umpir.ump.edu.my/id/eprint/21996/ Size-dependent charge storage of graphene flakes K. F., Chong C. Chan, Geraldine S. Ali, Gomaa A. M. Eunice Tang, Danella Algarni, H. QD Chemistry This paper focuses on the charge storage properties of reduced graphene oxide (rGO) in different flake sizes. Sonication is used to exfoliate rGO into different flake sizes, as confirmed by the spectroscopy and microscopy techniques. The oxygen-related functionalities on rGO samples are quantified by Fourier transform infrared spectroscopy and reveal that higher amount of unreduced oxygen functionalities can be found on rGO with smaller flake size. The charge storage properties of rGO in different flake sizes are studied by cyclic voltammetry, galvanostatic charge discharge and electrochemical impedance spectroscopy. The findings demonstrate that the rGO with smaller flake size possesses higher charge storage capability (238 F g-1 at x A g-1), as compared to that of rGO with larger flake size (147 F g-1 at x A g-1). Apart from larger surface area contribution, the unreduced oxygen functionalities in rGO with smaller flake size also plays an important role in contributing pseudocapacitance effect to the rGO. The current findings add substantial understanding of rGO flake size effect towards electrochemical properties. 2018-03 Conference or Workshop Item NonPeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/21996/1/38.%20Size-dependent%20charge%20storage%20of%20graphene%20flakes.pdf pdf en http://umpir.ump.edu.my/id/eprint/21996/2/38.1%20Size-dependent%20charge%20storage%20of%20graphene%20flakes.pdf K. F., Chong and C. Chan, Geraldine S. and Ali, Gomaa A. M. and Eunice Tang, Danella and Algarni, H. (2018) Size-dependent charge storage of graphene flakes. In: 4th Nanomaterials for Energy and Environment 2018, 27 - 29 Jun 2018 , Paris, France. pp. 1-20.. (Unpublished)
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English English
topic	QD Chemistry
spellingShingle	QD Chemistry K. F., Chong C. Chan, Geraldine S. Ali, Gomaa A. M. Eunice Tang, Danella Algarni, H. Size-dependent charge storage of graphene flakes
description	This paper focuses on the charge storage properties of reduced graphene oxide (rGO) in different flake sizes. Sonication is used to exfoliate rGO into different flake sizes, as confirmed by the spectroscopy and microscopy techniques. The oxygen-related functionalities on rGO samples are quantified by Fourier transform infrared spectroscopy and reveal that higher amount of unreduced oxygen functionalities can be found on rGO with smaller flake size. The charge storage properties of rGO in different flake sizes are studied by cyclic voltammetry, galvanostatic charge discharge and electrochemical impedance spectroscopy. The findings demonstrate that the rGO with smaller flake size possesses higher charge storage capability (238 F g-1 at x A g-1), as compared to that of rGO with larger flake size (147 F g-1 at x A g-1). Apart from larger surface area contribution, the unreduced oxygen functionalities in rGO with smaller flake size also plays an important role in contributing pseudocapacitance effect to the rGO. The current findings add substantial understanding of rGO flake size effect towards electrochemical properties.
format	Conference or Workshop Item
author	K. F., Chong C. Chan, Geraldine S. Ali, Gomaa A. M. Eunice Tang, Danella Algarni, H.
author_facet	K. F., Chong C. Chan, Geraldine S. Ali, Gomaa A. M. Eunice Tang, Danella Algarni, H.
author_sort	K. F., Chong
title	Size-dependent charge storage of graphene flakes
title_short	Size-dependent charge storage of graphene flakes
title_full	Size-dependent charge storage of graphene flakes
title_fullStr	Size-dependent charge storage of graphene flakes
title_full_unstemmed	Size-dependent charge storage of graphene flakes
title_sort	size-dependent charge storage of graphene flakes
publishDate	2018
url	http://umpir.ump.edu.my/id/eprint/21996/ http://umpir.ump.edu.my/id/eprint/21996/1/38.%20Size-dependent%20charge%20storage%20of%20graphene%20flakes.pdf http://umpir.ump.edu.my/id/eprint/21996/2/38.1%20Size-dependent%20charge%20storage%20of%20graphene%20flakes.pdf
first_indexed	2023-09-18T22:32:31Z
last_indexed	2023-09-18T22:32:31Z
_version_	1777416380668182528

Size-dependent charge storage of graphene flakes

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