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

Saafi, Mohamed Ben Salem and Gullane, Alex and Huang, Bo and Sadeghi, Hatef and Ye, Jianqiao and Sadeghi, Faraz (2018) Inherently multifunctional geopolymeric cementitious composite as electrical energy storage and self-sensing structural material. Composite Structures, 201. pp. 766-778. ISSN 0263-8223

[img]
Preview
PDF (accepted_version_Composite_structures_paper)
accepted_version_Composite_structures_paper.pdf - Accepted Version
Available under License Creative Commons Attribution-NonCommercial-NoDerivs.

Download (247kB)
[img]
Preview
PDF (Manuscript_figures_as_of_27_06_2018)
Manuscript_figures_as_of_27_06_2018.pdf - Accepted Version
Available under License Creative Commons Attribution-NonCommercial-NoDerivs.

Download (4MB)

Abstract

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 0.33kW/m2 with a discharge life of about 2 hours. The KGP stress sensors showed high sensitivity to compressive stress: 11 /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.

Item Type:
Journal Article
Journal or Publication Title:
Composite Structures
Additional Information:
This is the author’s version of a work that was accepted for publication in Composite Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Composite Structures, 201, 2018 DOI: 10.1016/j.compstruct.2018.06.101
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/aacsb/disciplinebasedresearch
Subjects:
ID Code:
126207
Deposited By:
Deposited On:
29 Jun 2018 09:30
Refereed?:
Yes
Published?:
Published
Last Modified:
26 Sep 2020 05:20