Multi‐Scale Imaging of Polymer Electrolyte Fuel Cells using X‐ray Micro‐ and Nano‐Computed Tomography, Transmission Electron Microscopy and Helium‐Ion Microscopy.
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| Title: | Multi‐Scale Imaging of Polymer Electrolyte Fuel Cells using X‐ray Micro‐ and Nano‐Computed Tomography, Transmission Electron Microscopy and Helium‐Ion Microscopy. |
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| Authors: | Meyer, Q.1,2, Hack, J.1, Mansor, N.1, Iacoviello, F.1, Bailey, J. J.1, Shearing, P. R.1, Brett, D. J. L.1 d.brett@ucl.ac.uk |
| Source: | Fuel Cells. Feb2019, Vol. 19 Issue 1, p35-42. 8p. |
| Subjects: | Proton exchange membrane fuel cells, Carbon fibers, Nafion, Catalysts, Hot pressing |
| Abstract: | Multi‐length scale imaging of polymer electrolyte fuel cell (PEFC) membrane electrode assembly (MEA) materials is a powerful tool for studying, understanding and furthering improvements in materials engineering, performance and durability. A hot pressed MEA has been imaged using X‐ray micro‐ and nano‐computed tomography (CT), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and recently developed helium‐ion microscopy (HeIM). X‐ray nano‐CT captures a volume containing all of the relevant fuel cell interfaces, from the carbon fiber of the gas diffusion layer (GDL) to the Nafion membrane with a field‐of‐view of 5 µm and a pixel size of 64 nm. Features identified include linear marks on the carbon fiber surface, agglomerates of carbon nanoparticles in the microporous layer (MPL), and intrusion of the catalyst layer material into the Nafion membrane during the hot‐pressing process. HeIM has enabled imaging of a large area of MEA from tens of micrometers to sub‐nanometers pixel resolution without any sample preparation, and has captured similar features to X‐ray micro‐CT and nano‐CT. Furthermore, at its highest resolution, the platinum and carbon catalyst nanoparticles can be distinguished at the surface of the catalyst layer, overcoming the limitations of SEM and TEM. [ABSTRACT FROM AUTHOR] |
| Copyright of Fuel Cells is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 134666520 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Multi‐Scale Imaging of Polymer Electrolyte Fuel Cells using X‐ray Micro‐ and Nano‐Computed Tomography, Transmission Electron Microscopy and Helium‐Ion Microscopy. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Meyer%2C+Q%2E%22">Meyer, Q.</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Hack%2C+J%2E%22">Hack, J.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Mansor%2C+N%2E%22">Mansor, N.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Iacoviello%2C+F%2E%22">Iacoviello, F.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Bailey%2C+J%2E+J%2E%22">Bailey, J. J.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Shearing%2C+P%2E+R%2E%22">Shearing, P. R.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Brett%2C+D%2E+J%2E+L%2E%22">Brett, D. J. L.</searchLink><relatesTo>1</relatesTo><i> d.brett@ucl.ac.uk</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Fuel+Cells%22">Fuel Cells</searchLink>. Feb2019, Vol. 19 Issue 1, p35-42. 8p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Proton+exchange+membrane+fuel+cells%22">Proton exchange membrane fuel cells</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+fibers%22">Carbon fibers</searchLink><br /><searchLink fieldCode="DE" term="%22Nafion%22">Nafion</searchLink><br /><searchLink fieldCode="DE" term="%22Catalysts%22">Catalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Hot+pressing%22">Hot pressing</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Multi‐length scale imaging of polymer electrolyte fuel cell (PEFC) membrane electrode assembly (MEA) materials is a powerful tool for studying, understanding and furthering improvements in materials engineering, performance and durability. A hot pressed MEA has been imaged using X‐ray micro‐ and nano‐computed tomography (CT), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and recently developed helium‐ion microscopy (HeIM). X‐ray nano‐CT captures a volume containing all of the relevant fuel cell interfaces, from the carbon fiber of the gas diffusion layer (GDL) to the Nafion membrane with a field‐of‐view of 5 µm and a pixel size of 64 nm. Features identified include linear marks on the carbon fiber surface, agglomerates of carbon nanoparticles in the microporous layer (MPL), and intrusion of the catalyst layer material into the Nafion membrane during the hot‐pressing process. HeIM has enabled imaging of a large area of MEA from tens of micrometers to sub‐nanometers pixel resolution without any sample preparation, and has captured similar features to X‐ray micro‐CT and nano‐CT. Furthermore, at its highest resolution, the platinum and carbon catalyst nanoparticles can be distinguished at the surface of the catalyst layer, overcoming the limitations of SEM and TEM. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Fuel Cells is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1002/fuce.201800047 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 8 StartPage: 35 Subjects: – SubjectFull: Proton exchange membrane fuel cells Type: general – SubjectFull: Carbon fibers Type: general – SubjectFull: Nafion Type: general – SubjectFull: Catalysts Type: general – SubjectFull: Hot pressing Type: general Titles: – TitleFull: Multi‐Scale Imaging of Polymer Electrolyte Fuel Cells using X‐ray Micro‐ and Nano‐Computed Tomography, Transmission Electron Microscopy and Helium‐Ion Microscopy. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Meyer, Q. – PersonEntity: Name: NameFull: Hack, J. – PersonEntity: Name: NameFull: Mansor, N. – PersonEntity: Name: NameFull: Iacoviello, F. – PersonEntity: Name: NameFull: Bailey, J. J. – PersonEntity: Name: NameFull: Shearing, P. R. – PersonEntity: Name: NameFull: Brett, D. J. L. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 02 Text: Feb2019 Type: published Y: 2019 Identifiers: – Type: issn-print Value: 16156846 Numbering: – Type: volume Value: 19 – Type: issue Value: 1 Titles: – TitleFull: Fuel Cells Type: main |
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