Expanded graphite-epoxy-flexible silica composite bipolar plates for PEM fuel cells

B. Dursun; F. Yaren; B. Unveroglu; S. Yazici; F. Dundar

doi:10.1002/fuce.201300185

Expanded graphite-epoxy-flexible silica composite bipolar plates for PEM fuel cells

B. Dursun, F. Yaren, B. Unveroglu, S. Yazici, F. Dundar^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

Abstract

Silica impregnated expanded graphite-epoxy composites are developed as bipolar plates for proton exchange membrane (PEM) fuel cells. These composite plates were prepared by solution impregnation, followed by compression molding and curing. Mechanical properties, electrical conductivities, corrosion resistance, and contact angles were determined as a function of impregnated content. The plates show high flexural strength with 5% methyltrimethoxysilane (MTMS) addition (20MPa) and in-plane conductivity of 131 S cm^-1 that meet the DOE target (>100 S cm^-1). Corrosion current values as low as 1.09 μAcm^-2 were obtained. The contact angle was found to be 80°. Power density of 1Wcm^-2 was achieved with custom made expanded graphite-polymer composite plates. High efficiency values were obtained at low current regions.

Original language	English
Pages (from-to)	862-867
Number of pages	6
Journal	Fuel Cells
Volume	14
Issue number	6
DOIs	https://doi.org/10.1002/fuce.201300185
Publication status	Published - 1 Dec 2014
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords

Bipolar plate
Composite
Expanded graphite
PEMFC
Silica

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/fuce.201300185

Cite this

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title = "Expanded graphite-epoxy-flexible silica composite bipolar plates for PEM fuel cells",

abstract = "Silica impregnated expanded graphite-epoxy composites are developed as bipolar plates for proton exchange membrane (PEM) fuel cells. These composite plates were prepared by solution impregnation, followed by compression molding and curing. Mechanical properties, electrical conductivities, corrosion resistance, and contact angles were determined as a function of impregnated content. The plates show high flexural strength with 5% methyltrimethoxysilane (MTMS) addition (20MPa) and in-plane conductivity of 131 S cm-1 that meet the DOE target (>100 S cm-1). Corrosion current values as low as 1.09 μAcm-2 were obtained. The contact angle was found to be 80°. Power density of 1Wcm-2 was achieved with custom made expanded graphite-polymer composite plates. High efficiency values were obtained at low current regions.",

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author = "B. Dursun and F. Yaren and B. Unveroglu and S. Yazici and F. Dundar",

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T1 - Expanded graphite-epoxy-flexible silica composite bipolar plates for PEM fuel cells

AU - Dursun, B.

AU - Yaren, F.

AU - Unveroglu, B.

AU - Yazici, S.

AU - Dundar, F.

PY - 2014/12/1

Y1 - 2014/12/1

N2 - Silica impregnated expanded graphite-epoxy composites are developed as bipolar plates for proton exchange membrane (PEM) fuel cells. These composite plates were prepared by solution impregnation, followed by compression molding and curing. Mechanical properties, electrical conductivities, corrosion resistance, and contact angles were determined as a function of impregnated content. The plates show high flexural strength with 5% methyltrimethoxysilane (MTMS) addition (20MPa) and in-plane conductivity of 131 S cm-1 that meet the DOE target (>100 S cm-1). Corrosion current values as low as 1.09 μAcm-2 were obtained. The contact angle was found to be 80°. Power density of 1Wcm-2 was achieved with custom made expanded graphite-polymer composite plates. High efficiency values were obtained at low current regions.

AB - Silica impregnated expanded graphite-epoxy composites are developed as bipolar plates for proton exchange membrane (PEM) fuel cells. These composite plates were prepared by solution impregnation, followed by compression molding and curing. Mechanical properties, electrical conductivities, corrosion resistance, and contact angles were determined as a function of impregnated content. The plates show high flexural strength with 5% methyltrimethoxysilane (MTMS) addition (20MPa) and in-plane conductivity of 131 S cm-1 that meet the DOE target (>100 S cm-1). Corrosion current values as low as 1.09 μAcm-2 were obtained. The contact angle was found to be 80°. Power density of 1Wcm-2 was achieved with custom made expanded graphite-polymer composite plates. High efficiency values were obtained at low current regions.

KW - Bipolar plate

KW - Composite

KW - Expanded graphite

KW - PEMFC

KW - Silica

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DO - 10.1002/fuce.201300185

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JO - Fuel Cells

JF - Fuel Cells

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Expanded graphite-epoxy-flexible silica composite bipolar plates for PEM fuel cells

Abstract

Bibliographical note

Keywords

UN SDGs

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