Pressure-independent through-plane electrical conductivity measurements of highly filled conductive polymer composites

Thomas Larsen; Tom Larsen; Søren Juhl Andreasen; Jesper De C. Christiansen

doi:10.1016/j.ijhydene.2022.11.318

Pressure-independent through-plane electrical conductivity measurements of highly filled conductive polymer composites

Thomas Larsen, Tom Larsen, Søren Juhl Andreasen, Jesper De C. Christiansen^*

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › Research › peer-review

2 Citations (Scopus)

2 Downloads (Pure)

Abstract

Highly filled conductive polymer composites (CPCs) are widely used in applications such as bipolar plate materials for polymer electrolyte membrane fuel cells and redox flow batteries, electromagnetic interference shielding and sensors due to their useful electrical properties. A common method for determining through-plane electrical conductivities σ_tp of such highly filled CPCs applies a conductive carbon paper between electrodes and sample with application of external pressure to improve electrical contact. We show the pressure-dependence of the measured σ_tp can be eliminated by using a liquid metal such as the gallium-indium eutectic alloy (EGaIn) as contact material. Results indicate that EGaIn reduces contact resistance and causes a four times larger σ_tp compared to measurements with carbon paper contacts and a pressure of 20 bar.

Original language	English
Journal	International Journal of Hydrogen Energy
Volume	48
Issue number	33
Pages (from-to)	12493-12500
Number of pages	8
ISSN	0360-3199
DOIs	https://doi.org/10.1016/j.ijhydene.2022.11.318
Publication status	Published - 19 Apr 2023

Keywords

Composite
Contact resistance
Fuel cell
Resistivity
Surface roughness

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10.1016/j.ijhydene.2022.11.318Licence: CC BY 4.0

Open Access articleFinal published version, 1.06 MBLicence: CC BY 4.0

https://arxiv.org/pdf/2208.04643

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title = "Pressure-independent through-plane electrical conductivity measurements of highly filled conductive polymer composites",

abstract = "Highly filled conductive polymer composites (CPCs) are widely used in applications such as bipolar plate materials for polymer electrolyte membrane fuel cells and redox flow batteries, electromagnetic interference shielding and sensors due to their useful electrical properties. A common method for determining through-plane electrical conductivities σtp of such highly filled CPCs applies a conductive carbon paper between electrodes and sample with application of external pressure to improve electrical contact. We show the pressure-dependence of the measured σtp can be eliminated by using a liquid metal such as the gallium-indium eutectic alloy (EGaIn) as contact material. Results indicate that EGaIn reduces contact resistance and causes a four times larger σtp compared to measurements with carbon paper contacts and a pressure of 20 bar.",

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AU - Larsen, Thomas

AU - Larsen, Tom

AU - Andreasen, Søren Juhl

AU - Christiansen, Jesper De C.

PY - 2023/4/19

Y1 - 2023/4/19

N2 - Highly filled conductive polymer composites (CPCs) are widely used in applications such as bipolar plate materials for polymer electrolyte membrane fuel cells and redox flow batteries, electromagnetic interference shielding and sensors due to their useful electrical properties. A common method for determining through-plane electrical conductivities σtp of such highly filled CPCs applies a conductive carbon paper between electrodes and sample with application of external pressure to improve electrical contact. We show the pressure-dependence of the measured σtp can be eliminated by using a liquid metal such as the gallium-indium eutectic alloy (EGaIn) as contact material. Results indicate that EGaIn reduces contact resistance and causes a four times larger σtp compared to measurements with carbon paper contacts and a pressure of 20 bar.

AB - Highly filled conductive polymer composites (CPCs) are widely used in applications such as bipolar plate materials for polymer electrolyte membrane fuel cells and redox flow batteries, electromagnetic interference shielding and sensors due to their useful electrical properties. A common method for determining through-plane electrical conductivities σtp of such highly filled CPCs applies a conductive carbon paper between electrodes and sample with application of external pressure to improve electrical contact. We show the pressure-dependence of the measured σtp can be eliminated by using a liquid metal such as the gallium-indium eutectic alloy (EGaIn) as contact material. Results indicate that EGaIn reduces contact resistance and causes a four times larger σtp compared to measurements with carbon paper contacts and a pressure of 20 bar.

KW - Composite

KW - Contact resistance

KW - Fuel cell

KW - Resistivity

KW - Surface roughness

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DO - 10.1016/j.ijhydene.2022.11.318

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EP - 12500

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

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ER -

Pressure-independent through-plane electrical conductivity measurements of highly filled conductive polymer composites

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Pressure-Independent Through-Plane Electrical Conductivity Measurements of Highly Filled Conductive Polymer Composites

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