A flexible supercapacitor with high capacitance retention at an ultra-low temperature of -65.0°C

Zheng, H; Guan, R; Liu, Q; Ou, KT; Li, DS; Fang, J; Fu, Q; Sun, Y

A flexible supercapacitor with high capacitance retention at an ultra-low temperature of -65.0°C

Zheng, H Guan, R Liu, Q Ou, KT Li, DS Fang, J Fu, Q

Sun, Y

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Publisher:: PERGAMON-ELSEVIER SCIENCE LTD
Publication Type:: Journal Article
Citation:: Electrochimica Acta, 2022, 424
Issue Date:: 2022-08-20

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Field	Value	Language
dc.contributor.author	Zheng, H
dc.contributor.author	Guan, R
dc.contributor.author	Liu, Q
dc.contributor.author	Ou, KT
dc.contributor.author	Li, DS
dc.contributor.author	Fang, J
dc.contributor.author	Fu, Q https://orcid.org/0000-0002-4012-330X
dc.contributor.author	Sun, Y
dc.date.accessioned	2023-03-17T00:37:07Z
dc.date.available	2023-03-17T00:37:07Z
dc.date.issued	2022-08-20
dc.identifier.citation	Electrochimica Acta, 2022, 424
dc.identifier.issn	0013-4686
dc.identifier.issn	1873-3859
dc.identifier.uri	http://hdl.handle.net/10453/167393
dc.description.abstract	A novel anti-freezing organo-hydrogel electrolyte is developed to improve capacitance retention of flexible supercapacitor at the ultra-low temperature. The electrolyte is composed of graphene/polyvinyl alcohol matrix and methyl sulfoxide/water/sulfuric acid mixture. It simultaneously possesses a high tensile strength of ca.2.58 MPa and a high ionic conductivity of ca.3.9 S/m. Furthermore, the electrolyte can still maintain high flexibility and high ionic conductivity (ca.1.0S/m) at -65℃. In addition, a flexible supercapacitor with sandwich structure was assembled from the organo-hydrogel electrolyte and two polyaniline fiber/carbon cloth electrodes. The supercapacitor exhibits a high specific capacitance of 252.0F/g and excellent capacitance retention of 93% at -65℃. The excellent capacitance retention is attributed to the synergistic effect of methyl sulfoxide, concentrated sulfuric acid and graphene nanosheets. This study provides a new way to design and prepare anti-freezing electrolyte with high-performance for application in the flexible solid-state electrochemical energy storage at ultra-low temperatures.
dc.language	English
dc.publisher	PERGAMON-ELSEVIER SCIENCE LTD
dc.relation.ispartof	Electrochimica Acta
dc.relation.isbasedon	10.1016/j.electacta.2022.140644
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	02 Physical Sciences, 03 Chemical Sciences, 09 Engineering
dc.subject.classification	Energy
dc.title	A flexible supercapacitor with high capacitance retention at an ultra-low temperature of -65.0°C
dc.type	Journal Article
utslib.citation.volume	424
utslib.for	02 Physical Sciences
utslib.for	03 Chemical Sciences
utslib.for	09 Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	closed_access	*
dc.date.updated	2023-03-17T00:36:34Z
pubs.publication-status	Published
pubs.volume	424

Abstract:

A novel anti-freezing organo-hydrogel electrolyte is developed to improve capacitance retention of flexible supercapacitor at the ultra-low temperature. The electrolyte is composed of graphene/polyvinyl alcohol matrix and methyl sulfoxide/water/sulfuric acid mixture. It simultaneously possesses a high tensile strength of ca.2.58 MPa and a high ionic conductivity of ca.3.9 S/m. Furthermore, the electrolyte can still maintain high flexibility and high ionic conductivity (ca.1.0S/m) at -65℃. In addition, a flexible supercapacitor with sandwich structure was assembled from the organo-hydrogel electrolyte and two polyaniline fiber/carbon cloth electrodes. The supercapacitor exhibits a high specific capacitance of 252.0F/g and excellent capacitance retention of 93% at -65℃. The excellent capacitance retention is attributed to the synergistic effect of methyl sulfoxide, concentrated sulfuric acid and graphene nanosheets. This study provides a new way to design and prepare anti-freezing electrolyte with high-performance for application in the flexible solid-state electrochemical energy storage at ultra-low temperatures.

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http://hdl.handle.net/10453/167393