Electrochemical Performance of Supercapacitor with Stacked Copper Foils Coated with Graphene Nanoplatelets

Abstract The energy density of conventional supercapacitors is in the range of 6–10 Wh kg−1, which has restricted them from many applications that require devices with long durations. Herein, we report a method for enhancing the energy density of a device through the parallel stacking of five copper...

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Autores principales:	S. L. Chiam, H. N. Lim, S. M. Hafiz, A. Pandikumar, N. M. Huang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/97d74679e84e492db3595735d4b4275f
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spelling	oai:doaj.org-article:97d74679e84e492db3595735d4b4275f2021-12-02T15:08:11ZElectrochemical Performance of Supercapacitor with Stacked Copper Foils Coated with Graphene Nanoplatelets10.1038/s41598-018-21572-x2045-2322https://doaj.org/article/97d74679e84e492db3595735d4b4275f2018-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-21572-xhttps://doaj.org/toc/2045-2322Abstract The energy density of conventional supercapacitors is in the range of 6–10 Wh kg−1, which has restricted them from many applications that require devices with long durations. Herein, we report a method for enhancing the energy density of a device through the parallel stacking of five copper foils coated on each side with graphene nanoplatelets. Microporous papers immersed in 2 M aqueous sodium sulphate were used as separators. With a low contact resistance of 0.05 Ω, the supercapacitor yielded an optimum specific energy density and a specific power density of 24.64 Wh kg−1 and 402 W kg−1 at 0.8 V, respectively. The working potential was increased to 2.4 V when three of the supercapacitors were connected in series, forming a tandem device. Its potential for real applications was manifested by the ability to light up a light-emitting diode for 40 s after charging for 60 s.S. L. ChiamH. N. LimS. M. HafizA. PandikumarN. M. HuangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-7 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q S. L. Chiam H. N. Lim S. M. Hafiz A. Pandikumar N. M. Huang Electrochemical Performance of Supercapacitor with Stacked Copper Foils Coated with Graphene Nanoplatelets
description	Abstract The energy density of conventional supercapacitors is in the range of 6–10 Wh kg−1, which has restricted them from many applications that require devices with long durations. Herein, we report a method for enhancing the energy density of a device through the parallel stacking of five copper foils coated on each side with graphene nanoplatelets. Microporous papers immersed in 2 M aqueous sodium sulphate were used as separators. With a low contact resistance of 0.05 Ω, the supercapacitor yielded an optimum specific energy density and a specific power density of 24.64 Wh kg−1 and 402 W kg−1 at 0.8 V, respectively. The working potential was increased to 2.4 V when three of the supercapacitors were connected in series, forming a tandem device. Its potential for real applications was manifested by the ability to light up a light-emitting diode for 40 s after charging for 60 s.
format	article
author	S. L. Chiam H. N. Lim S. M. Hafiz A. Pandikumar N. M. Huang
author_facet	S. L. Chiam H. N. Lim S. M. Hafiz A. Pandikumar N. M. Huang
author_sort	S. L. Chiam
title	Electrochemical Performance of Supercapacitor with Stacked Copper Foils Coated with Graphene Nanoplatelets
title_short	Electrochemical Performance of Supercapacitor with Stacked Copper Foils Coated with Graphene Nanoplatelets
title_full	Electrochemical Performance of Supercapacitor with Stacked Copper Foils Coated with Graphene Nanoplatelets
title_fullStr	Electrochemical Performance of Supercapacitor with Stacked Copper Foils Coated with Graphene Nanoplatelets
title_full_unstemmed	Electrochemical Performance of Supercapacitor with Stacked Copper Foils Coated with Graphene Nanoplatelets
title_sort	electrochemical performance of supercapacitor with stacked copper foils coated with graphene nanoplatelets
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/97d74679e84e492db3595735d4b4275f
work_keys_str_mv	AT slchiam electrochemicalperformanceofsupercapacitorwithstackedcopperfoilscoatedwithgraphenenanoplatelets AT hnlim electrochemicalperformanceofsupercapacitorwithstackedcopperfoilscoatedwithgraphenenanoplatelets AT smhafiz electrochemicalperformanceofsupercapacitorwithstackedcopperfoilscoatedwithgraphenenanoplatelets AT apandikumar electrochemicalperformanceofsupercapacitorwithstackedcopperfoilscoatedwithgraphenenanoplatelets AT nmhuang electrochemicalperformanceofsupercapacitorwithstackedcopperfoilscoatedwithgraphenenanoplatelets
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Electrochemical Performance of Supercapacitor with Stacked Copper Foils Coated with Graphene Nanoplatelets

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