Inherently multifunctional geopolymeric cementitious composite as electrical energy storage and self-sensing structural material

Saafi, M; Gullane, A; Huang, B; Sadeghi, H; Ye, J; Sadeghi, F

Inherently multifunctional geopolymeric cementitious composite as electrical energy storage and self-sensing structural material

Saafi, M Gullane, A Huang, B Sadeghi, H Ye, J Sadeghi, F

Permalink

Publication Type:: Journal Article
Citation:: Composite Structures, 2018, 201 pp. 766 - 778
Issue Date:: 2018-10-01

Closed Access

	Filename	Description	Size
	1-s2.0-S0263822318312431-main.pdf	Published Version	5.07 MB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Closed Access

This item is closed access and not available.

Full metadata record

Field	Value	Language
dc.contributor.author	Saafi, M	en_US
dc.contributor.author	Gullane, A	en_US
dc.contributor.author	Huang, B	en_US
dc.contributor.author	Sadeghi, H	en_US
dc.contributor.author	Ye, J	en_US
dc.contributor.author	Sadeghi, F	en_US
dc.date.issued	2018-10-01	en_US
dc.identifier.citation	Composite Structures, 2018, 201 pp. 766 - 778	en_US
dc.identifier.issn	0263-8223	en_US
dc.identifier.uri	http://hdl.handle.net/10453/131427
dc.description.abstract	© 2018 Elsevier Ltd In this paper, we demonstrate for the first time that potassium-geopolymeric (KGP) cementitious composites can be tuned to store and deliver energy, and sense themselves without adding any functional additives or physical sensors, thus creating intelligent concrete structures with built-in capacitors for electrical storage and sensors for structural health monitoring. Density function theory (DFT)-based simulations were performed to determine the electronic properties of the KGP cementitious composite and understand its conduction mechanism. Experimental characterization was also conducted to determine the structure, chemical composition, conduction mechanism, energy storage and sensing capabilities of the KGP cementitious composite. The DFT simulations suggested that the KGP cementitious composite relies on the diffusion of potassium (K+) ions to store electrical energy and sense mechanical stresses. The geopolymeric cementitious composite exhibited a good room temperature ionic conductivity in the range of 12 (10−2 S/m) and an activation energy as high as 0.97 eV. The maximum power density of the KGP capacitors is about 0.33 kW/m2 with a discharge life of about 2 h. The KGP stress sensors showed high sensitivity to compressive stress: 11 Ω/MPa based on impedance measurement and 0.55 deg/MPa based on phase measurement. With further development and characterization, the KGP cementitious composite can be an integral part of concrete structures in the form of a battery to store and deliver power, and sensors to monitor the structural integrity of urban infrastructure such as bridges, buildings and roads.	en_US
dc.relation.ispartof	Composite Structures	en_US
dc.relation.isbasedon	10.1016/j.compstruct.2018.06.101	en_US
dc.subject.classification	Materials	en_US
dc.title	Inherently multifunctional geopolymeric cementitious composite as electrical energy storage and self-sensing structural material	en_US
dc.type	Journal Article
utslib.citation.volume	201	en_US
utslib.for	0904 Chemical Engineering	en_US
utslib.for	09 Engineering	en_US
pubs.embargo.period	Not known	en_US
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
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	201	en_US

Abstract:

© 2018 Elsevier Ltd In this paper, we demonstrate for the first time that potassium-geopolymeric (KGP) cementitious composites can be tuned to store and deliver energy, and sense themselves without adding any functional additives or physical sensors, thus creating intelligent concrete structures with built-in capacitors for electrical storage and sensors for structural health monitoring. Density function theory (DFT)-based simulations were performed to determine the electronic properties of the KGP cementitious composite and understand its conduction mechanism. Experimental characterization was also conducted to determine the structure, chemical composition, conduction mechanism, energy storage and sensing capabilities of the KGP cementitious composite. The DFT simulations suggested that the KGP cementitious composite relies on the diffusion of potassium (K+) ions to store electrical energy and sense mechanical stresses. The geopolymeric cementitious composite exhibited a good room temperature ionic conductivity in the range of 12 (10−2 S/m) and an activation energy as high as 0.97 eV. The maximum power density of the KGP capacitors is about 0.33 kW/m2 with a discharge life of about 2 h. The KGP stress sensors showed high sensitivity to compressive stress: 11 Ω/MPa based on impedance measurement and 0.55 deg/MPa based on phase measurement. With further development and characterization, the KGP cementitious composite can be an integral part of concrete structures in the form of a battery to store and deliver power, and sensors to monitor the structural integrity of urban infrastructure such as bridges, buildings and roads.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/131427