Improving stability of reinforced composite membrane with hydrophilic interlayer coating

Nam Il Kim; Beum Geun Seo; Hae Wook Park; Jung Woo Shim; Hyun Jin Kong; Joon Hyung Shim

doi:10.1016/j.memsci.2023.121668

Improving stability of reinforced composite membrane with hydrophilic interlayer coating

Nam Il Kim, Beum Geun Seo, Hae Wook Park, Jung Woo Shim, Hyun Jin Kong, Joon Hyung Shim

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

3 Citations (Scopus)

Abstract

Coating a reinforced composite membrane with a hydrophilic Pt layer can substantially improve the durability of polymer membranes used in fuel cell applications. In this study, we investigated the performance and durability of Aquivion/expanded polytetrafluoroethylene (ePTFE)-reinforced composite membranes with varying Pt contents. We introduced a Pt coating onto ePTFE via magnetron sputtering and characterized the Pt layer using scanning electron microscopy and X-ray photoelectron spectroscopy. As the amount of Pt coating increased, the surface of ePTFE became more hydrophilic; thus, the Pt-impregnated composite membrane was better than the bare composite membrane. We evaluated the fuel cell performance through a single-cell test following membrane electrode assembly fabrication, and performed an accelerated degradation test by maintaining the cell at an open circuit voltage at 90 °C and low humidity (30% relative humidity) for 144 h. Compared to the pure composite membrane, the Pt-coated composite membrane showed less degradation and a lower fluorine emission rate. These results indicated that Pt-coated composite membranes are potentially suitable candidates for use in proton exchange membrane fuel cells.

Original language	English
Article number	121668
Journal	Journal of Membrane Science
Volume	679
DOIs	https://doi.org/10.1016/j.memsci.2023.121668
Publication status	Published - 2023 Aug 5

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. NRF-2019R1A2C2003054 ). This work was also supported by Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) ( 20213030030040 ).

Publisher Copyright:
© 2023 Elsevier B.V.

Keywords

Fuel cell
Membrane
Proton exchange membrane fuel cell
Reinforced composite membrane
Sputtering

ASJC Scopus subject areas

Biochemistry
General Materials Science
Physical and Theoretical Chemistry
Filtration and Separation

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10.1016/j.memsci.2023.121668

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title = "Improving stability of reinforced composite membrane with hydrophilic interlayer coating",

abstract = "Coating a reinforced composite membrane with a hydrophilic Pt layer can substantially improve the durability of polymer membranes used in fuel cell applications. In this study, we investigated the performance and durability of Aquivion/expanded polytetrafluoroethylene (ePTFE)-reinforced composite membranes with varying Pt contents. We introduced a Pt coating onto ePTFE via magnetron sputtering and characterized the Pt layer using scanning electron microscopy and X-ray photoelectron spectroscopy. As the amount of Pt coating increased, the surface of ePTFE became more hydrophilic; thus, the Pt-impregnated composite membrane was better than the bare composite membrane. We evaluated the fuel cell performance through a single-cell test following membrane electrode assembly fabrication, and performed an accelerated degradation test by maintaining the cell at an open circuit voltage at 90 °C and low humidity (30% relative humidity) for 144 h. Compared to the pure composite membrane, the Pt-coated composite membrane showed less degradation and a lower fluorine emission rate. These results indicated that Pt-coated composite membranes are potentially suitable candidates for use in proton exchange membrane fuel cells.",

keywords = "Fuel cell, Membrane, Proton exchange membrane fuel cell, Reinforced composite membrane, Sputtering",

author = "Kim, {Nam Il} and Seo, {Beum Geun} and Park, {Hae Wook} and Shim, {Jung Woo} and Kong, {Hyun Jin} and Shim, {Joon Hyung}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. NRF-2019R1A2C2003054 ). This work was also supported by Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) ( 20213030030040 ). Publisher Copyright: {\textcopyright} 2023 Elsevier B.V.",

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doi = "10.1016/j.memsci.2023.121668",

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TY - JOUR

T1 - Improving stability of reinforced composite membrane with hydrophilic interlayer coating

AU - Kim, Nam Il

AU - Seo, Beum Geun

AU - Park, Hae Wook

AU - Shim, Jung Woo

AU - Kong, Hyun Jin

AU - Shim, Joon Hyung

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. NRF-2019R1A2C2003054 ). This work was also supported by Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) ( 20213030030040 ). Publisher Copyright: © 2023 Elsevier B.V.

PY - 2023/8/5

Y1 - 2023/8/5

N2 - Coating a reinforced composite membrane with a hydrophilic Pt layer can substantially improve the durability of polymer membranes used in fuel cell applications. In this study, we investigated the performance and durability of Aquivion/expanded polytetrafluoroethylene (ePTFE)-reinforced composite membranes with varying Pt contents. We introduced a Pt coating onto ePTFE via magnetron sputtering and characterized the Pt layer using scanning electron microscopy and X-ray photoelectron spectroscopy. As the amount of Pt coating increased, the surface of ePTFE became more hydrophilic; thus, the Pt-impregnated composite membrane was better than the bare composite membrane. We evaluated the fuel cell performance through a single-cell test following membrane electrode assembly fabrication, and performed an accelerated degradation test by maintaining the cell at an open circuit voltage at 90 °C and low humidity (30% relative humidity) for 144 h. Compared to the pure composite membrane, the Pt-coated composite membrane showed less degradation and a lower fluorine emission rate. These results indicated that Pt-coated composite membranes are potentially suitable candidates for use in proton exchange membrane fuel cells.

AB - Coating a reinforced composite membrane with a hydrophilic Pt layer can substantially improve the durability of polymer membranes used in fuel cell applications. In this study, we investigated the performance and durability of Aquivion/expanded polytetrafluoroethylene (ePTFE)-reinforced composite membranes with varying Pt contents. We introduced a Pt coating onto ePTFE via magnetron sputtering and characterized the Pt layer using scanning electron microscopy and X-ray photoelectron spectroscopy. As the amount of Pt coating increased, the surface of ePTFE became more hydrophilic; thus, the Pt-impregnated composite membrane was better than the bare composite membrane. We evaluated the fuel cell performance through a single-cell test following membrane electrode assembly fabrication, and performed an accelerated degradation test by maintaining the cell at an open circuit voltage at 90 °C and low humidity (30% relative humidity) for 144 h. Compared to the pure composite membrane, the Pt-coated composite membrane showed less degradation and a lower fluorine emission rate. These results indicated that Pt-coated composite membranes are potentially suitable candidates for use in proton exchange membrane fuel cells.

KW - Fuel cell

KW - Membrane

KW - Proton exchange membrane fuel cell

KW - Reinforced composite membrane

KW - Sputtering

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DO - 10.1016/j.memsci.2023.121668

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ER -

Improving stability of reinforced composite membrane with hydrophilic interlayer coating

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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