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    Rights statement: 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

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    Rights statement: 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

    Accepted author manuscript, 4.46 MB, PDF document

    Available under license: CC BY-NC-ND: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License

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

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Inherently multifunctional geopolymeric cementitious composite as electrical energy storage and self-sensing structural material. / Saafi, Mohamed Ben Salem; Gullane, Alex ; Huang, Bo; Sadeghi, Hatef; Ye, Jianqiao; Sadeghi, Faraz .

In: Composite Structures, Vol. 201, 01.10.2018, p. 766-778.

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@article{9a17c30ea7644188a61c4f69cc799ba4,
title = "Inherently multifunctional geopolymeric cementitious composite as electrical energy storage and self-sensing structural material",
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. ",
keywords = "Geopolymer, cementitious, composite, energy storage, self-sensing",
author = "Saafi, {Mohamed Ben Salem} and Alex Gullane and Bo Huang and Hatef Sadeghi and Jianqiao Ye and Faraz Sadeghi",
note = "This is the author{\textquoteright}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",
year = "2018",
month = oct,
day = "1",
doi = "10.1016/j.compstruct.2018.06.101",
language = "English",
volume = "201",
pages = "766--778",
journal = "Composite Structures",
issn = "0263-8223",
publisher = "Elsevier Ltd",

}

RIS

TY - JOUR

T1 - Inherently multifunctional geopolymeric cementitious composite as electrical energy storage and self-sensing structural material

AU - Saafi, Mohamed Ben Salem

AU - Gullane, Alex

AU - Huang, Bo

AU - Sadeghi, Hatef

AU - Ye, Jianqiao

AU - Sadeghi, Faraz

N1 - 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

PY - 2018/10/1

Y1 - 2018/10/1

N2 - 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.

AB - 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.

KW - Geopolymer

KW - cementitious

KW - composite

KW - energy storage

KW - self-sensing

U2 - 10.1016/j.compstruct.2018.06.101

DO - 10.1016/j.compstruct.2018.06.101

M3 - Journal article

VL - 201

SP - 766

EP - 778

JO - Composite Structures

JF - Composite Structures

SN - 0263-8223

ER -